Transcript Integrus - IR & Bandwidth
Slide 1
System Technology
System Block Diagram
Infra-Red Radiation
Signal Processing
Audio Channel Quality Modes
Carriers and Channels
Audio Encoding and Quality
Transmission Protocol
Security Systems
1
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
I&O Manual
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Diagram Digital Infra-Red Transmission System
Transmission Protocol
DCN Next
Generation
DCN
system
Integrus
Transmitter
Up to 32
Interpreters
desks 6ch.
Audio
sources
Channels
Integrus
Radiator
Integrus
Receiver
Integrus
Radiator
Integrus
Receiver
Integrus
Radiator
Integrus
Receiver
Integrus
Radiator
Integrus
Receiver
Integrus
Charging equipment
Security Systems
2
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Infra Red Radiation
Based on transmission by modulated infra-red radiation.
Has a wavelength just above that of visible light.
Like visible light, it is reflected from hard surfaces, yet passes through
translucent materials such as glass.
Radiators are used to emission infra-red light with a wavelength of 870 nm.
Security Systems
3
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Infra- Red spectrum in relation to other spectra
%
100
75
1
50
25
4
5
2
0
400
500
600
700
3
800
1000 nm
1
Daylight spectrum 2 Sensitivity of the human eye 3 Intra- Red radiator
4
Sensitivity of the Infra- Red diode at the receiver
5
Sensitivity of the Infra- Red diode at the receiver with daylight filter
Security Systems
4
870 900
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Signal Processing
Audio
Channel 01
A/D Conversion
& Compression
4x
4x
Audio
Channel 04
Protocol Creation
& Modulation
A/D Conversion
& Compression
The Integrus system uses high frequency carrier signals (typically 2-8 MHz)
to prevent interference problems with modern light sources.
The transmission system converts analogue audio signals to digital
frequency modulated infra-red light.
The digital audio processing guarantees a constant high audio quality.
Receivers pick up the digital frequency modulated infra-red signal and
convert it back to an audio signal for a headphone.
Security Systems
5
Carrier
(to IR Radiator)
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Signal Processing main steps
1. A/D conversion - Each analogue audio channel is converted to a digital
signal.
2. Compression - To increase the amount of digital information.
3. Protocol Creation - Groups of four digital signals are combined into one
digital information stream. Fault algorithm information is added for fault
detection and correction.
4. Modulation - A high frequency carrier signal is phase-modulated with
the digital information stream.
5. Radiation – Up to 8 modulated carrier signals are combined and sent to
the infra-red radiators, which convert the carrier signals to modulated
infra-red light.
6. De-Modulation – a reversed process is used in the IR receivers to
convert the modulated infra-red light to separate analogue audio
channels.
Security Systems
6
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Audio Channel Quality modes
Up to four different audio channel quality modes:
1)
Mono, standard quality, maximum 32 channels of 10kHz
2)
Mono, premium quality, maximum 16 channels of 20kHz
3)
Stereo,standard quality, maximum 16 channels of 2x 10kHz
4)
Stereo,premium quality, maximum 8 channels of 2x 20kHz
The Standard quality mode uses less bandwidth and can be used for
transmitting speech.
For music the Premium quality mode is advisable.
Security Systems
7
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Carriers and Channels
Up to 8 different carrier signals (depending on the transmitter type) can
be transmit. Each carrier can contain up to 4 different audio channels.
The maximum number of channels per carrier is dependent on the
chosen quality modes.
Per carrier a mix of channels with different quality modes is possible, as
long as the total available bandwidth is not exceeded.
Security Systems
8
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Carriers and Channels
This table lists all possible channel combinations per carrier:
Channel Quality
10kHz
10kHz
10kHz
10kHz
10kHz
10kHz
10kHz
Mono SQ
20kHz
20kHz
10kHz (L)
10kHz
10kHz (R)
10kHz (L)
10kHz (R)
10kHz (L)
10kHz (R)
10kHz (L)
10kHz (R)
20kHz
20kHz
20kHz (L)
20kHz (R)
Carrier
Security Systems
9
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Mono PQ
Stereo SQ
Stereo PQ
Carriers and Channels
Carrier Allocation
-3 d B
2 .3 3 3
3
3 .6 6 7
4 .3 3 3
5
5 .6 6 7
6 .3 3 3
G u a rd b a n d
f (M H z )
The data is digitally modulated onto the carriers. The modulation method
used is DQPSK (Differential Quadrature Phase Shift Keying) with coherent
detection at the receiver.
The information is carried by the phase changes.
Security Systems
10
7
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Audio Encoding and Quality
All audio sent by the transmitter, is compressed by a sub-band APCM
(Adaptive Pulse Code Modulation) encoder.
System Audio Performance
Measured from the audio input of an LBB4503 to the headphone output of
an LBB4540
Audio frequency response:
Standard Quality mode………………...
: 20 Hz to 10 kHz (-3 dB)
Premium Quality…………….………….
: 20 Hz to 20 kHz (-3 dB)
Total harmonic distortion at 1kHz …
: < 0.05 %
Crosstalk attenuation at 4 kHz….….
: > 80 dB
Dynamic range………………………..
: > 80 dB
Weighted signal-to-noise ratio……..
: > 80 dB(A)
Security Systems
11
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
I&O Manual
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Transmission Protocol
Protocol and modulation technique :
according to IEC 61603 part 7
Carrier structure
Each carrier contains:
synchronization information
audio slots
data slot(s)
A Reed-Solomon RS coder is applied to protect the audio and data
information for transmission errors.
Security Systems
12
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Transmission Protocol
With four Standard Quality channels
Audio slot A
Audio slot B
SQ
Audio slot A
SYNC
RS frame 0
RS frame 1
RS frame 2
SQ
Audio slot B
SQ
RS frame 3
RS frame 4
1 super frame
Security Systems
13
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
data
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
RS parity
SQ
data
RS frame 5
RS parity
Transmission Protocol
With two Premium Quality channels
Audio slot A
PQ
Audio slot A
SYNC
RS frame 0
RS frame 1
RS frame 2
Audio slot B
PQ
RS frame 3
data
Audio slot B
RS frame 4
1 super frame
Security Systems
14
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
RS parity
data
RS frame 5
RS parity
System Technology
End of section
Security Systems
15
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Slide 2
System Technology
System Block Diagram
Infra-Red Radiation
Signal Processing
Audio Channel Quality Modes
Carriers and Channels
Audio Encoding and Quality
Transmission Protocol
Security Systems
1
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
I&O Manual
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Diagram Digital Infra-Red Transmission System
Transmission Protocol
DCN Next
Generation
DCN
system
Integrus
Transmitter
Up to 32
Interpreters
desks 6ch.
Audio
sources
Channels
Integrus
Radiator
Integrus
Receiver
Integrus
Radiator
Integrus
Receiver
Integrus
Radiator
Integrus
Receiver
Integrus
Radiator
Integrus
Receiver
Integrus
Charging equipment
Security Systems
2
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Infra Red Radiation
Based on transmission by modulated infra-red radiation.
Has a wavelength just above that of visible light.
Like visible light, it is reflected from hard surfaces, yet passes through
translucent materials such as glass.
Radiators are used to emission infra-red light with a wavelength of 870 nm.
Security Systems
3
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Infra- Red spectrum in relation to other spectra
%
100
75
1
50
25
4
5
2
0
400
500
600
700
3
800
1000 nm
1
Daylight spectrum 2 Sensitivity of the human eye 3 Intra- Red radiator
4
Sensitivity of the Infra- Red diode at the receiver
5
Sensitivity of the Infra- Red diode at the receiver with daylight filter
Security Systems
4
870 900
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Signal Processing
Audio
Channel 01
A/D Conversion
& Compression
4x
4x
Audio
Channel 04
Protocol Creation
& Modulation
A/D Conversion
& Compression
The Integrus system uses high frequency carrier signals (typically 2-8 MHz)
to prevent interference problems with modern light sources.
The transmission system converts analogue audio signals to digital
frequency modulated infra-red light.
The digital audio processing guarantees a constant high audio quality.
Receivers pick up the digital frequency modulated infra-red signal and
convert it back to an audio signal for a headphone.
Security Systems
5
Carrier
(to IR Radiator)
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Signal Processing main steps
1. A/D conversion - Each analogue audio channel is converted to a digital
signal.
2. Compression - To increase the amount of digital information.
3. Protocol Creation - Groups of four digital signals are combined into one
digital information stream. Fault algorithm information is added for fault
detection and correction.
4. Modulation - A high frequency carrier signal is phase-modulated with
the digital information stream.
5. Radiation – Up to 8 modulated carrier signals are combined and sent to
the infra-red radiators, which convert the carrier signals to modulated
infra-red light.
6. De-Modulation – a reversed process is used in the IR receivers to
convert the modulated infra-red light to separate analogue audio
channels.
Security Systems
6
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Audio Channel Quality modes
Up to four different audio channel quality modes:
1)
Mono, standard quality, maximum 32 channels of 10kHz
2)
Mono, premium quality, maximum 16 channels of 20kHz
3)
Stereo,standard quality, maximum 16 channels of 2x 10kHz
4)
Stereo,premium quality, maximum 8 channels of 2x 20kHz
The Standard quality mode uses less bandwidth and can be used for
transmitting speech.
For music the Premium quality mode is advisable.
Security Systems
7
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Carriers and Channels
Up to 8 different carrier signals (depending on the transmitter type) can
be transmit. Each carrier can contain up to 4 different audio channels.
The maximum number of channels per carrier is dependent on the
chosen quality modes.
Per carrier a mix of channels with different quality modes is possible, as
long as the total available bandwidth is not exceeded.
Security Systems
8
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Carriers and Channels
This table lists all possible channel combinations per carrier:
Channel Quality
10kHz
10kHz
10kHz
10kHz
10kHz
10kHz
10kHz
Mono SQ
20kHz
20kHz
10kHz (L)
10kHz
10kHz (R)
10kHz (L)
10kHz (R)
10kHz (L)
10kHz (R)
10kHz (L)
10kHz (R)
20kHz
20kHz
20kHz (L)
20kHz (R)
Carrier
Security Systems
9
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Mono PQ
Stereo SQ
Stereo PQ
Carriers and Channels
Carrier Allocation
-3 d B
2 .3 3 3
3
3 .6 6 7
4 .3 3 3
5
5 .6 6 7
6 .3 3 3
G u a rd b a n d
f (M H z )
The data is digitally modulated onto the carriers. The modulation method
used is DQPSK (Differential Quadrature Phase Shift Keying) with coherent
detection at the receiver.
The information is carried by the phase changes.
Security Systems
10
7
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Audio Encoding and Quality
All audio sent by the transmitter, is compressed by a sub-band APCM
(Adaptive Pulse Code Modulation) encoder.
System Audio Performance
Measured from the audio input of an LBB4503 to the headphone output of
an LBB4540
Audio frequency response:
Standard Quality mode………………...
: 20 Hz to 10 kHz (-3 dB)
Premium Quality…………….………….
: 20 Hz to 20 kHz (-3 dB)
Total harmonic distortion at 1kHz …
: < 0.05 %
Crosstalk attenuation at 4 kHz….….
: > 80 dB
Dynamic range………………………..
: > 80 dB
Weighted signal-to-noise ratio……..
: > 80 dB(A)
Security Systems
11
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
I&O Manual
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Transmission Protocol
Protocol and modulation technique :
according to IEC 61603 part 7
Carrier structure
Each carrier contains:
synchronization information
audio slots
data slot(s)
A Reed-Solomon RS coder is applied to protect the audio and data
information for transmission errors.
Security Systems
12
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Transmission Protocol
With four Standard Quality channels
Audio slot A
Audio slot B
SQ
Audio slot A
SYNC
RS frame 0
RS frame 1
RS frame 2
SQ
Audio slot B
SQ
RS frame 3
RS frame 4
1 super frame
Security Systems
13
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
data
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
RS parity
SQ
data
RS frame 5
RS parity
Transmission Protocol
With two Premium Quality channels
Audio slot A
PQ
Audio slot A
SYNC
RS frame 0
RS frame 1
RS frame 2
Audio slot B
PQ
RS frame 3
data
Audio slot B
RS frame 4
1 super frame
Security Systems
14
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
RS parity
data
RS frame 5
RS parity
System Technology
End of section
Security Systems
15
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Slide 3
System Technology
System Block Diagram
Infra-Red Radiation
Signal Processing
Audio Channel Quality Modes
Carriers and Channels
Audio Encoding and Quality
Transmission Protocol
Security Systems
1
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
I&O Manual
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Diagram Digital Infra-Red Transmission System
Transmission Protocol
DCN Next
Generation
DCN
system
Integrus
Transmitter
Up to 32
Interpreters
desks 6ch.
Audio
sources
Channels
Integrus
Radiator
Integrus
Receiver
Integrus
Radiator
Integrus
Receiver
Integrus
Radiator
Integrus
Receiver
Integrus
Radiator
Integrus
Receiver
Integrus
Charging equipment
Security Systems
2
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Infra Red Radiation
Based on transmission by modulated infra-red radiation.
Has a wavelength just above that of visible light.
Like visible light, it is reflected from hard surfaces, yet passes through
translucent materials such as glass.
Radiators are used to emission infra-red light with a wavelength of 870 nm.
Security Systems
3
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Infra- Red spectrum in relation to other spectra
%
100
75
1
50
25
4
5
2
0
400
500
600
700
3
800
1000 nm
1
Daylight spectrum 2 Sensitivity of the human eye 3 Intra- Red radiator
4
Sensitivity of the Infra- Red diode at the receiver
5
Sensitivity of the Infra- Red diode at the receiver with daylight filter
Security Systems
4
870 900
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Signal Processing
Audio
Channel 01
A/D Conversion
& Compression
4x
4x
Audio
Channel 04
Protocol Creation
& Modulation
A/D Conversion
& Compression
The Integrus system uses high frequency carrier signals (typically 2-8 MHz)
to prevent interference problems with modern light sources.
The transmission system converts analogue audio signals to digital
frequency modulated infra-red light.
The digital audio processing guarantees a constant high audio quality.
Receivers pick up the digital frequency modulated infra-red signal and
convert it back to an audio signal for a headphone.
Security Systems
5
Carrier
(to IR Radiator)
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Signal Processing main steps
1. A/D conversion - Each analogue audio channel is converted to a digital
signal.
2. Compression - To increase the amount of digital information.
3. Protocol Creation - Groups of four digital signals are combined into one
digital information stream. Fault algorithm information is added for fault
detection and correction.
4. Modulation - A high frequency carrier signal is phase-modulated with
the digital information stream.
5. Radiation – Up to 8 modulated carrier signals are combined and sent to
the infra-red radiators, which convert the carrier signals to modulated
infra-red light.
6. De-Modulation – a reversed process is used in the IR receivers to
convert the modulated infra-red light to separate analogue audio
channels.
Security Systems
6
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Audio Channel Quality modes
Up to four different audio channel quality modes:
1)
Mono, standard quality, maximum 32 channels of 10kHz
2)
Mono, premium quality, maximum 16 channels of 20kHz
3)
Stereo,standard quality, maximum 16 channels of 2x 10kHz
4)
Stereo,premium quality, maximum 8 channels of 2x 20kHz
The Standard quality mode uses less bandwidth and can be used for
transmitting speech.
For music the Premium quality mode is advisable.
Security Systems
7
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Carriers and Channels
Up to 8 different carrier signals (depending on the transmitter type) can
be transmit. Each carrier can contain up to 4 different audio channels.
The maximum number of channels per carrier is dependent on the
chosen quality modes.
Per carrier a mix of channels with different quality modes is possible, as
long as the total available bandwidth is not exceeded.
Security Systems
8
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Carriers and Channels
This table lists all possible channel combinations per carrier:
Channel Quality
10kHz
10kHz
10kHz
10kHz
10kHz
10kHz
10kHz
Mono SQ
20kHz
20kHz
10kHz (L)
10kHz
10kHz (R)
10kHz (L)
10kHz (R)
10kHz (L)
10kHz (R)
10kHz (L)
10kHz (R)
20kHz
20kHz
20kHz (L)
20kHz (R)
Carrier
Security Systems
9
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Mono PQ
Stereo SQ
Stereo PQ
Carriers and Channels
Carrier Allocation
-3 d B
2 .3 3 3
3
3 .6 6 7
4 .3 3 3
5
5 .6 6 7
6 .3 3 3
G u a rd b a n d
f (M H z )
The data is digitally modulated onto the carriers. The modulation method
used is DQPSK (Differential Quadrature Phase Shift Keying) with coherent
detection at the receiver.
The information is carried by the phase changes.
Security Systems
10
7
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Audio Encoding and Quality
All audio sent by the transmitter, is compressed by a sub-band APCM
(Adaptive Pulse Code Modulation) encoder.
System Audio Performance
Measured from the audio input of an LBB4503 to the headphone output of
an LBB4540
Audio frequency response:
Standard Quality mode………………...
: 20 Hz to 10 kHz (-3 dB)
Premium Quality…………….………….
: 20 Hz to 20 kHz (-3 dB)
Total harmonic distortion at 1kHz …
: < 0.05 %
Crosstalk attenuation at 4 kHz….….
: > 80 dB
Dynamic range………………………..
: > 80 dB
Weighted signal-to-noise ratio……..
: > 80 dB(A)
Security Systems
11
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
I&O Manual
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Transmission Protocol
Protocol and modulation technique :
according to IEC 61603 part 7
Carrier structure
Each carrier contains:
synchronization information
audio slots
data slot(s)
A Reed-Solomon RS coder is applied to protect the audio and data
information for transmission errors.
Security Systems
12
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Transmission Protocol
With four Standard Quality channels
Audio slot A
Audio slot B
SQ
Audio slot A
SYNC
RS frame 0
RS frame 1
RS frame 2
SQ
Audio slot B
SQ
RS frame 3
RS frame 4
1 super frame
Security Systems
13
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
data
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
RS parity
SQ
data
RS frame 5
RS parity
Transmission Protocol
With two Premium Quality channels
Audio slot A
PQ
Audio slot A
SYNC
RS frame 0
RS frame 1
RS frame 2
Audio slot B
PQ
RS frame 3
data
Audio slot B
RS frame 4
1 super frame
Security Systems
14
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
RS parity
data
RS frame 5
RS parity
System Technology
End of section
Security Systems
15
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Slide 4
System Technology
System Block Diagram
Infra-Red Radiation
Signal Processing
Audio Channel Quality Modes
Carriers and Channels
Audio Encoding and Quality
Transmission Protocol
Security Systems
1
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
I&O Manual
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Diagram Digital Infra-Red Transmission System
Transmission Protocol
DCN Next
Generation
DCN
system
Integrus
Transmitter
Up to 32
Interpreters
desks 6ch.
Audio
sources
Channels
Integrus
Radiator
Integrus
Receiver
Integrus
Radiator
Integrus
Receiver
Integrus
Radiator
Integrus
Receiver
Integrus
Radiator
Integrus
Receiver
Integrus
Charging equipment
Security Systems
2
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Infra Red Radiation
Based on transmission by modulated infra-red radiation.
Has a wavelength just above that of visible light.
Like visible light, it is reflected from hard surfaces, yet passes through
translucent materials such as glass.
Radiators are used to emission infra-red light with a wavelength of 870 nm.
Security Systems
3
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Infra- Red spectrum in relation to other spectra
%
100
75
1
50
25
4
5
2
0
400
500
600
700
3
800
1000 nm
1
Daylight spectrum 2 Sensitivity of the human eye 3 Intra- Red radiator
4
Sensitivity of the Infra- Red diode at the receiver
5
Sensitivity of the Infra- Red diode at the receiver with daylight filter
Security Systems
4
870 900
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Signal Processing
Audio
Channel 01
A/D Conversion
& Compression
4x
4x
Audio
Channel 04
Protocol Creation
& Modulation
A/D Conversion
& Compression
The Integrus system uses high frequency carrier signals (typically 2-8 MHz)
to prevent interference problems with modern light sources.
The transmission system converts analogue audio signals to digital
frequency modulated infra-red light.
The digital audio processing guarantees a constant high audio quality.
Receivers pick up the digital frequency modulated infra-red signal and
convert it back to an audio signal for a headphone.
Security Systems
5
Carrier
(to IR Radiator)
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Signal Processing main steps
1. A/D conversion - Each analogue audio channel is converted to a digital
signal.
2. Compression - To increase the amount of digital information.
3. Protocol Creation - Groups of four digital signals are combined into one
digital information stream. Fault algorithm information is added for fault
detection and correction.
4. Modulation - A high frequency carrier signal is phase-modulated with
the digital information stream.
5. Radiation – Up to 8 modulated carrier signals are combined and sent to
the infra-red radiators, which convert the carrier signals to modulated
infra-red light.
6. De-Modulation – a reversed process is used in the IR receivers to
convert the modulated infra-red light to separate analogue audio
channels.
Security Systems
6
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Audio Channel Quality modes
Up to four different audio channel quality modes:
1)
Mono, standard quality, maximum 32 channels of 10kHz
2)
Mono, premium quality, maximum 16 channels of 20kHz
3)
Stereo,standard quality, maximum 16 channels of 2x 10kHz
4)
Stereo,premium quality, maximum 8 channels of 2x 20kHz
The Standard quality mode uses less bandwidth and can be used for
transmitting speech.
For music the Premium quality mode is advisable.
Security Systems
7
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Carriers and Channels
Up to 8 different carrier signals (depending on the transmitter type) can
be transmit. Each carrier can contain up to 4 different audio channels.
The maximum number of channels per carrier is dependent on the
chosen quality modes.
Per carrier a mix of channels with different quality modes is possible, as
long as the total available bandwidth is not exceeded.
Security Systems
8
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Carriers and Channels
This table lists all possible channel combinations per carrier:
Channel Quality
10kHz
10kHz
10kHz
10kHz
10kHz
10kHz
10kHz
Mono SQ
20kHz
20kHz
10kHz (L)
10kHz
10kHz (R)
10kHz (L)
10kHz (R)
10kHz (L)
10kHz (R)
10kHz (L)
10kHz (R)
20kHz
20kHz
20kHz (L)
20kHz (R)
Carrier
Security Systems
9
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Mono PQ
Stereo SQ
Stereo PQ
Carriers and Channels
Carrier Allocation
-3 d B
2 .3 3 3
3
3 .6 6 7
4 .3 3 3
5
5 .6 6 7
6 .3 3 3
G u a rd b a n d
f (M H z )
The data is digitally modulated onto the carriers. The modulation method
used is DQPSK (Differential Quadrature Phase Shift Keying) with coherent
detection at the receiver.
The information is carried by the phase changes.
Security Systems
10
7
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Audio Encoding and Quality
All audio sent by the transmitter, is compressed by a sub-band APCM
(Adaptive Pulse Code Modulation) encoder.
System Audio Performance
Measured from the audio input of an LBB4503 to the headphone output of
an LBB4540
Audio frequency response:
Standard Quality mode………………...
: 20 Hz to 10 kHz (-3 dB)
Premium Quality…………….………….
: 20 Hz to 20 kHz (-3 dB)
Total harmonic distortion at 1kHz …
: < 0.05 %
Crosstalk attenuation at 4 kHz….….
: > 80 dB
Dynamic range………………………..
: > 80 dB
Weighted signal-to-noise ratio……..
: > 80 dB(A)
Security Systems
11
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
I&O Manual
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Transmission Protocol
Protocol and modulation technique :
according to IEC 61603 part 7
Carrier structure
Each carrier contains:
synchronization information
audio slots
data slot(s)
A Reed-Solomon RS coder is applied to protect the audio and data
information for transmission errors.
Security Systems
12
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Transmission Protocol
With four Standard Quality channels
Audio slot A
Audio slot B
SQ
Audio slot A
SYNC
RS frame 0
RS frame 1
RS frame 2
SQ
Audio slot B
SQ
RS frame 3
RS frame 4
1 super frame
Security Systems
13
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
data
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
RS parity
SQ
data
RS frame 5
RS parity
Transmission Protocol
With two Premium Quality channels
Audio slot A
PQ
Audio slot A
SYNC
RS frame 0
RS frame 1
RS frame 2
Audio slot B
PQ
RS frame 3
data
Audio slot B
RS frame 4
1 super frame
Security Systems
14
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
RS parity
data
RS frame 5
RS parity
System Technology
End of section
Security Systems
15
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Slide 5
System Technology
System Block Diagram
Infra-Red Radiation
Signal Processing
Audio Channel Quality Modes
Carriers and Channels
Audio Encoding and Quality
Transmission Protocol
Security Systems
1
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
I&O Manual
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Diagram Digital Infra-Red Transmission System
Transmission Protocol
DCN Next
Generation
DCN
system
Integrus
Transmitter
Up to 32
Interpreters
desks 6ch.
Audio
sources
Channels
Integrus
Radiator
Integrus
Receiver
Integrus
Radiator
Integrus
Receiver
Integrus
Radiator
Integrus
Receiver
Integrus
Radiator
Integrus
Receiver
Integrus
Charging equipment
Security Systems
2
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Infra Red Radiation
Based on transmission by modulated infra-red radiation.
Has a wavelength just above that of visible light.
Like visible light, it is reflected from hard surfaces, yet passes through
translucent materials such as glass.
Radiators are used to emission infra-red light with a wavelength of 870 nm.
Security Systems
3
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Infra- Red spectrum in relation to other spectra
%
100
75
1
50
25
4
5
2
0
400
500
600
700
3
800
1000 nm
1
Daylight spectrum 2 Sensitivity of the human eye 3 Intra- Red radiator
4
Sensitivity of the Infra- Red diode at the receiver
5
Sensitivity of the Infra- Red diode at the receiver with daylight filter
Security Systems
4
870 900
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Signal Processing
Audio
Channel 01
A/D Conversion
& Compression
4x
4x
Audio
Channel 04
Protocol Creation
& Modulation
A/D Conversion
& Compression
The Integrus system uses high frequency carrier signals (typically 2-8 MHz)
to prevent interference problems with modern light sources.
The transmission system converts analogue audio signals to digital
frequency modulated infra-red light.
The digital audio processing guarantees a constant high audio quality.
Receivers pick up the digital frequency modulated infra-red signal and
convert it back to an audio signal for a headphone.
Security Systems
5
Carrier
(to IR Radiator)
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Signal Processing main steps
1. A/D conversion - Each analogue audio channel is converted to a digital
signal.
2. Compression - To increase the amount of digital information.
3. Protocol Creation - Groups of four digital signals are combined into one
digital information stream. Fault algorithm information is added for fault
detection and correction.
4. Modulation - A high frequency carrier signal is phase-modulated with
the digital information stream.
5. Radiation – Up to 8 modulated carrier signals are combined and sent to
the infra-red radiators, which convert the carrier signals to modulated
infra-red light.
6. De-Modulation – a reversed process is used in the IR receivers to
convert the modulated infra-red light to separate analogue audio
channels.
Security Systems
6
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Audio Channel Quality modes
Up to four different audio channel quality modes:
1)
Mono, standard quality, maximum 32 channels of 10kHz
2)
Mono, premium quality, maximum 16 channels of 20kHz
3)
Stereo,standard quality, maximum 16 channels of 2x 10kHz
4)
Stereo,premium quality, maximum 8 channels of 2x 20kHz
The Standard quality mode uses less bandwidth and can be used for
transmitting speech.
For music the Premium quality mode is advisable.
Security Systems
7
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Carriers and Channels
Up to 8 different carrier signals (depending on the transmitter type) can
be transmit. Each carrier can contain up to 4 different audio channels.
The maximum number of channels per carrier is dependent on the
chosen quality modes.
Per carrier a mix of channels with different quality modes is possible, as
long as the total available bandwidth is not exceeded.
Security Systems
8
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Carriers and Channels
This table lists all possible channel combinations per carrier:
Channel Quality
10kHz
10kHz
10kHz
10kHz
10kHz
10kHz
10kHz
Mono SQ
20kHz
20kHz
10kHz (L)
10kHz
10kHz (R)
10kHz (L)
10kHz (R)
10kHz (L)
10kHz (R)
10kHz (L)
10kHz (R)
20kHz
20kHz
20kHz (L)
20kHz (R)
Carrier
Security Systems
9
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Mono PQ
Stereo SQ
Stereo PQ
Carriers and Channels
Carrier Allocation
-3 d B
2 .3 3 3
3
3 .6 6 7
4 .3 3 3
5
5 .6 6 7
6 .3 3 3
G u a rd b a n d
f (M H z )
The data is digitally modulated onto the carriers. The modulation method
used is DQPSK (Differential Quadrature Phase Shift Keying) with coherent
detection at the receiver.
The information is carried by the phase changes.
Security Systems
10
7
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Audio Encoding and Quality
All audio sent by the transmitter, is compressed by a sub-band APCM
(Adaptive Pulse Code Modulation) encoder.
System Audio Performance
Measured from the audio input of an LBB4503 to the headphone output of
an LBB4540
Audio frequency response:
Standard Quality mode………………...
: 20 Hz to 10 kHz (-3 dB)
Premium Quality…………….………….
: 20 Hz to 20 kHz (-3 dB)
Total harmonic distortion at 1kHz …
: < 0.05 %
Crosstalk attenuation at 4 kHz….….
: > 80 dB
Dynamic range………………………..
: > 80 dB
Weighted signal-to-noise ratio……..
: > 80 dB(A)
Security Systems
11
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
I&O Manual
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Transmission Protocol
Protocol and modulation technique :
according to IEC 61603 part 7
Carrier structure
Each carrier contains:
synchronization information
audio slots
data slot(s)
A Reed-Solomon RS coder is applied to protect the audio and data
information for transmission errors.
Security Systems
12
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Transmission Protocol
With four Standard Quality channels
Audio slot A
Audio slot B
SQ
Audio slot A
SYNC
RS frame 0
RS frame 1
RS frame 2
SQ
Audio slot B
SQ
RS frame 3
RS frame 4
1 super frame
Security Systems
13
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
data
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
RS parity
SQ
data
RS frame 5
RS parity
Transmission Protocol
With two Premium Quality channels
Audio slot A
PQ
Audio slot A
SYNC
RS frame 0
RS frame 1
RS frame 2
Audio slot B
PQ
RS frame 3
data
Audio slot B
RS frame 4
1 super frame
Security Systems
14
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
RS parity
data
RS frame 5
RS parity
System Technology
End of section
Security Systems
15
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Slide 6
System Technology
System Block Diagram
Infra-Red Radiation
Signal Processing
Audio Channel Quality Modes
Carriers and Channels
Audio Encoding and Quality
Transmission Protocol
Security Systems
1
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
I&O Manual
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Diagram Digital Infra-Red Transmission System
Transmission Protocol
DCN Next
Generation
DCN
system
Integrus
Transmitter
Up to 32
Interpreters
desks 6ch.
Audio
sources
Channels
Integrus
Radiator
Integrus
Receiver
Integrus
Radiator
Integrus
Receiver
Integrus
Radiator
Integrus
Receiver
Integrus
Radiator
Integrus
Receiver
Integrus
Charging equipment
Security Systems
2
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Infra Red Radiation
Based on transmission by modulated infra-red radiation.
Has a wavelength just above that of visible light.
Like visible light, it is reflected from hard surfaces, yet passes through
translucent materials such as glass.
Radiators are used to emission infra-red light with a wavelength of 870 nm.
Security Systems
3
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Infra- Red spectrum in relation to other spectra
%
100
75
1
50
25
4
5
2
0
400
500
600
700
3
800
1000 nm
1
Daylight spectrum 2 Sensitivity of the human eye 3 Intra- Red radiator
4
Sensitivity of the Infra- Red diode at the receiver
5
Sensitivity of the Infra- Red diode at the receiver with daylight filter
Security Systems
4
870 900
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Signal Processing
Audio
Channel 01
A/D Conversion
& Compression
4x
4x
Audio
Channel 04
Protocol Creation
& Modulation
A/D Conversion
& Compression
The Integrus system uses high frequency carrier signals (typically 2-8 MHz)
to prevent interference problems with modern light sources.
The transmission system converts analogue audio signals to digital
frequency modulated infra-red light.
The digital audio processing guarantees a constant high audio quality.
Receivers pick up the digital frequency modulated infra-red signal and
convert it back to an audio signal for a headphone.
Security Systems
5
Carrier
(to IR Radiator)
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Signal Processing main steps
1. A/D conversion - Each analogue audio channel is converted to a digital
signal.
2. Compression - To increase the amount of digital information.
3. Protocol Creation - Groups of four digital signals are combined into one
digital information stream. Fault algorithm information is added for fault
detection and correction.
4. Modulation - A high frequency carrier signal is phase-modulated with
the digital information stream.
5. Radiation – Up to 8 modulated carrier signals are combined and sent to
the infra-red radiators, which convert the carrier signals to modulated
infra-red light.
6. De-Modulation – a reversed process is used in the IR receivers to
convert the modulated infra-red light to separate analogue audio
channels.
Security Systems
6
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Audio Channel Quality modes
Up to four different audio channel quality modes:
1)
Mono, standard quality, maximum 32 channels of 10kHz
2)
Mono, premium quality, maximum 16 channels of 20kHz
3)
Stereo,standard quality, maximum 16 channels of 2x 10kHz
4)
Stereo,premium quality, maximum 8 channels of 2x 20kHz
The Standard quality mode uses less bandwidth and can be used for
transmitting speech.
For music the Premium quality mode is advisable.
Security Systems
7
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Carriers and Channels
Up to 8 different carrier signals (depending on the transmitter type) can
be transmit. Each carrier can contain up to 4 different audio channels.
The maximum number of channels per carrier is dependent on the
chosen quality modes.
Per carrier a mix of channels with different quality modes is possible, as
long as the total available bandwidth is not exceeded.
Security Systems
8
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Carriers and Channels
This table lists all possible channel combinations per carrier:
Channel Quality
10kHz
10kHz
10kHz
10kHz
10kHz
10kHz
10kHz
Mono SQ
20kHz
20kHz
10kHz (L)
10kHz
10kHz (R)
10kHz (L)
10kHz (R)
10kHz (L)
10kHz (R)
10kHz (L)
10kHz (R)
20kHz
20kHz
20kHz (L)
20kHz (R)
Carrier
Security Systems
9
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Mono PQ
Stereo SQ
Stereo PQ
Carriers and Channels
Carrier Allocation
-3 d B
2 .3 3 3
3
3 .6 6 7
4 .3 3 3
5
5 .6 6 7
6 .3 3 3
G u a rd b a n d
f (M H z )
The data is digitally modulated onto the carriers. The modulation method
used is DQPSK (Differential Quadrature Phase Shift Keying) with coherent
detection at the receiver.
The information is carried by the phase changes.
Security Systems
10
7
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Audio Encoding and Quality
All audio sent by the transmitter, is compressed by a sub-band APCM
(Adaptive Pulse Code Modulation) encoder.
System Audio Performance
Measured from the audio input of an LBB4503 to the headphone output of
an LBB4540
Audio frequency response:
Standard Quality mode………………...
: 20 Hz to 10 kHz (-3 dB)
Premium Quality…………….………….
: 20 Hz to 20 kHz (-3 dB)
Total harmonic distortion at 1kHz …
: < 0.05 %
Crosstalk attenuation at 4 kHz….….
: > 80 dB
Dynamic range………………………..
: > 80 dB
Weighted signal-to-noise ratio……..
: > 80 dB(A)
Security Systems
11
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
I&O Manual
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Transmission Protocol
Protocol and modulation technique :
according to IEC 61603 part 7
Carrier structure
Each carrier contains:
synchronization information
audio slots
data slot(s)
A Reed-Solomon RS coder is applied to protect the audio and data
information for transmission errors.
Security Systems
12
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Transmission Protocol
With four Standard Quality channels
Audio slot A
Audio slot B
SQ
Audio slot A
SYNC
RS frame 0
RS frame 1
RS frame 2
SQ
Audio slot B
SQ
RS frame 3
RS frame 4
1 super frame
Security Systems
13
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
data
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
RS parity
SQ
data
RS frame 5
RS parity
Transmission Protocol
With two Premium Quality channels
Audio slot A
PQ
Audio slot A
SYNC
RS frame 0
RS frame 1
RS frame 2
Audio slot B
PQ
RS frame 3
data
Audio slot B
RS frame 4
1 super frame
Security Systems
14
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
RS parity
data
RS frame 5
RS parity
System Technology
End of section
Security Systems
15
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Slide 7
System Technology
System Block Diagram
Infra-Red Radiation
Signal Processing
Audio Channel Quality Modes
Carriers and Channels
Audio Encoding and Quality
Transmission Protocol
Security Systems
1
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
I&O Manual
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Diagram Digital Infra-Red Transmission System
Transmission Protocol
DCN Next
Generation
DCN
system
Integrus
Transmitter
Up to 32
Interpreters
desks 6ch.
Audio
sources
Channels
Integrus
Radiator
Integrus
Receiver
Integrus
Radiator
Integrus
Receiver
Integrus
Radiator
Integrus
Receiver
Integrus
Radiator
Integrus
Receiver
Integrus
Charging equipment
Security Systems
2
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Infra Red Radiation
Based on transmission by modulated infra-red radiation.
Has a wavelength just above that of visible light.
Like visible light, it is reflected from hard surfaces, yet passes through
translucent materials such as glass.
Radiators are used to emission infra-red light with a wavelength of 870 nm.
Security Systems
3
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Infra- Red spectrum in relation to other spectra
%
100
75
1
50
25
4
5
2
0
400
500
600
700
3
800
1000 nm
1
Daylight spectrum 2 Sensitivity of the human eye 3 Intra- Red radiator
4
Sensitivity of the Infra- Red diode at the receiver
5
Sensitivity of the Infra- Red diode at the receiver with daylight filter
Security Systems
4
870 900
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Signal Processing
Audio
Channel 01
A/D Conversion
& Compression
4x
4x
Audio
Channel 04
Protocol Creation
& Modulation
A/D Conversion
& Compression
The Integrus system uses high frequency carrier signals (typically 2-8 MHz)
to prevent interference problems with modern light sources.
The transmission system converts analogue audio signals to digital
frequency modulated infra-red light.
The digital audio processing guarantees a constant high audio quality.
Receivers pick up the digital frequency modulated infra-red signal and
convert it back to an audio signal for a headphone.
Security Systems
5
Carrier
(to IR Radiator)
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Signal Processing main steps
1. A/D conversion - Each analogue audio channel is converted to a digital
signal.
2. Compression - To increase the amount of digital information.
3. Protocol Creation - Groups of four digital signals are combined into one
digital information stream. Fault algorithm information is added for fault
detection and correction.
4. Modulation - A high frequency carrier signal is phase-modulated with
the digital information stream.
5. Radiation – Up to 8 modulated carrier signals are combined and sent to
the infra-red radiators, which convert the carrier signals to modulated
infra-red light.
6. De-Modulation – a reversed process is used in the IR receivers to
convert the modulated infra-red light to separate analogue audio
channels.
Security Systems
6
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Audio Channel Quality modes
Up to four different audio channel quality modes:
1)
Mono, standard quality, maximum 32 channels of 10kHz
2)
Mono, premium quality, maximum 16 channels of 20kHz
3)
Stereo,standard quality, maximum 16 channels of 2x 10kHz
4)
Stereo,premium quality, maximum 8 channels of 2x 20kHz
The Standard quality mode uses less bandwidth and can be used for
transmitting speech.
For music the Premium quality mode is advisable.
Security Systems
7
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Carriers and Channels
Up to 8 different carrier signals (depending on the transmitter type) can
be transmit. Each carrier can contain up to 4 different audio channels.
The maximum number of channels per carrier is dependent on the
chosen quality modes.
Per carrier a mix of channels with different quality modes is possible, as
long as the total available bandwidth is not exceeded.
Security Systems
8
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Carriers and Channels
This table lists all possible channel combinations per carrier:
Channel Quality
10kHz
10kHz
10kHz
10kHz
10kHz
10kHz
10kHz
Mono SQ
20kHz
20kHz
10kHz (L)
10kHz
10kHz (R)
10kHz (L)
10kHz (R)
10kHz (L)
10kHz (R)
10kHz (L)
10kHz (R)
20kHz
20kHz
20kHz (L)
20kHz (R)
Carrier
Security Systems
9
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Mono PQ
Stereo SQ
Stereo PQ
Carriers and Channels
Carrier Allocation
-3 d B
2 .3 3 3
3
3 .6 6 7
4 .3 3 3
5
5 .6 6 7
6 .3 3 3
G u a rd b a n d
f (M H z )
The data is digitally modulated onto the carriers. The modulation method
used is DQPSK (Differential Quadrature Phase Shift Keying) with coherent
detection at the receiver.
The information is carried by the phase changes.
Security Systems
10
7
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Audio Encoding and Quality
All audio sent by the transmitter, is compressed by a sub-band APCM
(Adaptive Pulse Code Modulation) encoder.
System Audio Performance
Measured from the audio input of an LBB4503 to the headphone output of
an LBB4540
Audio frequency response:
Standard Quality mode………………...
: 20 Hz to 10 kHz (-3 dB)
Premium Quality…………….………….
: 20 Hz to 20 kHz (-3 dB)
Total harmonic distortion at 1kHz …
: < 0.05 %
Crosstalk attenuation at 4 kHz….….
: > 80 dB
Dynamic range………………………..
: > 80 dB
Weighted signal-to-noise ratio……..
: > 80 dB(A)
Security Systems
11
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
I&O Manual
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Transmission Protocol
Protocol and modulation technique :
according to IEC 61603 part 7
Carrier structure
Each carrier contains:
synchronization information
audio slots
data slot(s)
A Reed-Solomon RS coder is applied to protect the audio and data
information for transmission errors.
Security Systems
12
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Transmission Protocol
With four Standard Quality channels
Audio slot A
Audio slot B
SQ
Audio slot A
SYNC
RS frame 0
RS frame 1
RS frame 2
SQ
Audio slot B
SQ
RS frame 3
RS frame 4
1 super frame
Security Systems
13
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
data
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
RS parity
SQ
data
RS frame 5
RS parity
Transmission Protocol
With two Premium Quality channels
Audio slot A
PQ
Audio slot A
SYNC
RS frame 0
RS frame 1
RS frame 2
Audio slot B
PQ
RS frame 3
data
Audio slot B
RS frame 4
1 super frame
Security Systems
14
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
RS parity
data
RS frame 5
RS parity
System Technology
End of section
Security Systems
15
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Slide 8
System Technology
System Block Diagram
Infra-Red Radiation
Signal Processing
Audio Channel Quality Modes
Carriers and Channels
Audio Encoding and Quality
Transmission Protocol
Security Systems
1
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
I&O Manual
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Diagram Digital Infra-Red Transmission System
Transmission Protocol
DCN Next
Generation
DCN
system
Integrus
Transmitter
Up to 32
Interpreters
desks 6ch.
Audio
sources
Channels
Integrus
Radiator
Integrus
Receiver
Integrus
Radiator
Integrus
Receiver
Integrus
Radiator
Integrus
Receiver
Integrus
Radiator
Integrus
Receiver
Integrus
Charging equipment
Security Systems
2
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Infra Red Radiation
Based on transmission by modulated infra-red radiation.
Has a wavelength just above that of visible light.
Like visible light, it is reflected from hard surfaces, yet passes through
translucent materials such as glass.
Radiators are used to emission infra-red light with a wavelength of 870 nm.
Security Systems
3
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Infra- Red spectrum in relation to other spectra
%
100
75
1
50
25
4
5
2
0
400
500
600
700
3
800
1000 nm
1
Daylight spectrum 2 Sensitivity of the human eye 3 Intra- Red radiator
4
Sensitivity of the Infra- Red diode at the receiver
5
Sensitivity of the Infra- Red diode at the receiver with daylight filter
Security Systems
4
870 900
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Signal Processing
Audio
Channel 01
A/D Conversion
& Compression
4x
4x
Audio
Channel 04
Protocol Creation
& Modulation
A/D Conversion
& Compression
The Integrus system uses high frequency carrier signals (typically 2-8 MHz)
to prevent interference problems with modern light sources.
The transmission system converts analogue audio signals to digital
frequency modulated infra-red light.
The digital audio processing guarantees a constant high audio quality.
Receivers pick up the digital frequency modulated infra-red signal and
convert it back to an audio signal for a headphone.
Security Systems
5
Carrier
(to IR Radiator)
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Signal Processing main steps
1. A/D conversion - Each analogue audio channel is converted to a digital
signal.
2. Compression - To increase the amount of digital information.
3. Protocol Creation - Groups of four digital signals are combined into one
digital information stream. Fault algorithm information is added for fault
detection and correction.
4. Modulation - A high frequency carrier signal is phase-modulated with
the digital information stream.
5. Radiation – Up to 8 modulated carrier signals are combined and sent to
the infra-red radiators, which convert the carrier signals to modulated
infra-red light.
6. De-Modulation – a reversed process is used in the IR receivers to
convert the modulated infra-red light to separate analogue audio
channels.
Security Systems
6
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Audio Channel Quality modes
Up to four different audio channel quality modes:
1)
Mono, standard quality, maximum 32 channels of 10kHz
2)
Mono, premium quality, maximum 16 channels of 20kHz
3)
Stereo,standard quality, maximum 16 channels of 2x 10kHz
4)
Stereo,premium quality, maximum 8 channels of 2x 20kHz
The Standard quality mode uses less bandwidth and can be used for
transmitting speech.
For music the Premium quality mode is advisable.
Security Systems
7
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Carriers and Channels
Up to 8 different carrier signals (depending on the transmitter type) can
be transmit. Each carrier can contain up to 4 different audio channels.
The maximum number of channels per carrier is dependent on the
chosen quality modes.
Per carrier a mix of channels with different quality modes is possible, as
long as the total available bandwidth is not exceeded.
Security Systems
8
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Carriers and Channels
This table lists all possible channel combinations per carrier:
Channel Quality
10kHz
10kHz
10kHz
10kHz
10kHz
10kHz
10kHz
Mono SQ
20kHz
20kHz
10kHz (L)
10kHz
10kHz (R)
10kHz (L)
10kHz (R)
10kHz (L)
10kHz (R)
10kHz (L)
10kHz (R)
20kHz
20kHz
20kHz (L)
20kHz (R)
Carrier
Security Systems
9
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Mono PQ
Stereo SQ
Stereo PQ
Carriers and Channels
Carrier Allocation
-3 d B
2 .3 3 3
3
3 .6 6 7
4 .3 3 3
5
5 .6 6 7
6 .3 3 3
G u a rd b a n d
f (M H z )
The data is digitally modulated onto the carriers. The modulation method
used is DQPSK (Differential Quadrature Phase Shift Keying) with coherent
detection at the receiver.
The information is carried by the phase changes.
Security Systems
10
7
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Audio Encoding and Quality
All audio sent by the transmitter, is compressed by a sub-band APCM
(Adaptive Pulse Code Modulation) encoder.
System Audio Performance
Measured from the audio input of an LBB4503 to the headphone output of
an LBB4540
Audio frequency response:
Standard Quality mode………………...
: 20 Hz to 10 kHz (-3 dB)
Premium Quality…………….………….
: 20 Hz to 20 kHz (-3 dB)
Total harmonic distortion at 1kHz …
: < 0.05 %
Crosstalk attenuation at 4 kHz….….
: > 80 dB
Dynamic range………………………..
: > 80 dB
Weighted signal-to-noise ratio……..
: > 80 dB(A)
Security Systems
11
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
I&O Manual
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Transmission Protocol
Protocol and modulation technique :
according to IEC 61603 part 7
Carrier structure
Each carrier contains:
synchronization information
audio slots
data slot(s)
A Reed-Solomon RS coder is applied to protect the audio and data
information for transmission errors.
Security Systems
12
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Transmission Protocol
With four Standard Quality channels
Audio slot A
Audio slot B
SQ
Audio slot A
SYNC
RS frame 0
RS frame 1
RS frame 2
SQ
Audio slot B
SQ
RS frame 3
RS frame 4
1 super frame
Security Systems
13
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
data
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
RS parity
SQ
data
RS frame 5
RS parity
Transmission Protocol
With two Premium Quality channels
Audio slot A
PQ
Audio slot A
SYNC
RS frame 0
RS frame 1
RS frame 2
Audio slot B
PQ
RS frame 3
data
Audio slot B
RS frame 4
1 super frame
Security Systems
14
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
RS parity
data
RS frame 5
RS parity
System Technology
End of section
Security Systems
15
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Slide 9
System Technology
System Block Diagram
Infra-Red Radiation
Signal Processing
Audio Channel Quality Modes
Carriers and Channels
Audio Encoding and Quality
Transmission Protocol
Security Systems
1
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
I&O Manual
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Diagram Digital Infra-Red Transmission System
Transmission Protocol
DCN Next
Generation
DCN
system
Integrus
Transmitter
Up to 32
Interpreters
desks 6ch.
Audio
sources
Channels
Integrus
Radiator
Integrus
Receiver
Integrus
Radiator
Integrus
Receiver
Integrus
Radiator
Integrus
Receiver
Integrus
Radiator
Integrus
Receiver
Integrus
Charging equipment
Security Systems
2
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Infra Red Radiation
Based on transmission by modulated infra-red radiation.
Has a wavelength just above that of visible light.
Like visible light, it is reflected from hard surfaces, yet passes through
translucent materials such as glass.
Radiators are used to emission infra-red light with a wavelength of 870 nm.
Security Systems
3
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Infra- Red spectrum in relation to other spectra
%
100
75
1
50
25
4
5
2
0
400
500
600
700
3
800
1000 nm
1
Daylight spectrum 2 Sensitivity of the human eye 3 Intra- Red radiator
4
Sensitivity of the Infra- Red diode at the receiver
5
Sensitivity of the Infra- Red diode at the receiver with daylight filter
Security Systems
4
870 900
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Signal Processing
Audio
Channel 01
A/D Conversion
& Compression
4x
4x
Audio
Channel 04
Protocol Creation
& Modulation
A/D Conversion
& Compression
The Integrus system uses high frequency carrier signals (typically 2-8 MHz)
to prevent interference problems with modern light sources.
The transmission system converts analogue audio signals to digital
frequency modulated infra-red light.
The digital audio processing guarantees a constant high audio quality.
Receivers pick up the digital frequency modulated infra-red signal and
convert it back to an audio signal for a headphone.
Security Systems
5
Carrier
(to IR Radiator)
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Signal Processing main steps
1. A/D conversion - Each analogue audio channel is converted to a digital
signal.
2. Compression - To increase the amount of digital information.
3. Protocol Creation - Groups of four digital signals are combined into one
digital information stream. Fault algorithm information is added for fault
detection and correction.
4. Modulation - A high frequency carrier signal is phase-modulated with
the digital information stream.
5. Radiation – Up to 8 modulated carrier signals are combined and sent to
the infra-red radiators, which convert the carrier signals to modulated
infra-red light.
6. De-Modulation – a reversed process is used in the IR receivers to
convert the modulated infra-red light to separate analogue audio
channels.
Security Systems
6
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Audio Channel Quality modes
Up to four different audio channel quality modes:
1)
Mono, standard quality, maximum 32 channels of 10kHz
2)
Mono, premium quality, maximum 16 channels of 20kHz
3)
Stereo,standard quality, maximum 16 channels of 2x 10kHz
4)
Stereo,premium quality, maximum 8 channels of 2x 20kHz
The Standard quality mode uses less bandwidth and can be used for
transmitting speech.
For music the Premium quality mode is advisable.
Security Systems
7
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Carriers and Channels
Up to 8 different carrier signals (depending on the transmitter type) can
be transmit. Each carrier can contain up to 4 different audio channels.
The maximum number of channels per carrier is dependent on the
chosen quality modes.
Per carrier a mix of channels with different quality modes is possible, as
long as the total available bandwidth is not exceeded.
Security Systems
8
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Carriers and Channels
This table lists all possible channel combinations per carrier:
Channel Quality
10kHz
10kHz
10kHz
10kHz
10kHz
10kHz
10kHz
Mono SQ
20kHz
20kHz
10kHz (L)
10kHz
10kHz (R)
10kHz (L)
10kHz (R)
10kHz (L)
10kHz (R)
10kHz (L)
10kHz (R)
20kHz
20kHz
20kHz (L)
20kHz (R)
Carrier
Security Systems
9
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Mono PQ
Stereo SQ
Stereo PQ
Carriers and Channels
Carrier Allocation
-3 d B
2 .3 3 3
3
3 .6 6 7
4 .3 3 3
5
5 .6 6 7
6 .3 3 3
G u a rd b a n d
f (M H z )
The data is digitally modulated onto the carriers. The modulation method
used is DQPSK (Differential Quadrature Phase Shift Keying) with coherent
detection at the receiver.
The information is carried by the phase changes.
Security Systems
10
7
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Audio Encoding and Quality
All audio sent by the transmitter, is compressed by a sub-band APCM
(Adaptive Pulse Code Modulation) encoder.
System Audio Performance
Measured from the audio input of an LBB4503 to the headphone output of
an LBB4540
Audio frequency response:
Standard Quality mode………………...
: 20 Hz to 10 kHz (-3 dB)
Premium Quality…………….………….
: 20 Hz to 20 kHz (-3 dB)
Total harmonic distortion at 1kHz …
: < 0.05 %
Crosstalk attenuation at 4 kHz….….
: > 80 dB
Dynamic range………………………..
: > 80 dB
Weighted signal-to-noise ratio……..
: > 80 dB(A)
Security Systems
11
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
I&O Manual
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Transmission Protocol
Protocol and modulation technique :
according to IEC 61603 part 7
Carrier structure
Each carrier contains:
synchronization information
audio slots
data slot(s)
A Reed-Solomon RS coder is applied to protect the audio and data
information for transmission errors.
Security Systems
12
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Transmission Protocol
With four Standard Quality channels
Audio slot A
Audio slot B
SQ
Audio slot A
SYNC
RS frame 0
RS frame 1
RS frame 2
SQ
Audio slot B
SQ
RS frame 3
RS frame 4
1 super frame
Security Systems
13
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
data
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
RS parity
SQ
data
RS frame 5
RS parity
Transmission Protocol
With two Premium Quality channels
Audio slot A
PQ
Audio slot A
SYNC
RS frame 0
RS frame 1
RS frame 2
Audio slot B
PQ
RS frame 3
data
Audio slot B
RS frame 4
1 super frame
Security Systems
14
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
RS parity
data
RS frame 5
RS parity
System Technology
End of section
Security Systems
15
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Slide 10
System Technology
System Block Diagram
Infra-Red Radiation
Signal Processing
Audio Channel Quality Modes
Carriers and Channels
Audio Encoding and Quality
Transmission Protocol
Security Systems
1
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
I&O Manual
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Diagram Digital Infra-Red Transmission System
Transmission Protocol
DCN Next
Generation
DCN
system
Integrus
Transmitter
Up to 32
Interpreters
desks 6ch.
Audio
sources
Channels
Integrus
Radiator
Integrus
Receiver
Integrus
Radiator
Integrus
Receiver
Integrus
Radiator
Integrus
Receiver
Integrus
Radiator
Integrus
Receiver
Integrus
Charging equipment
Security Systems
2
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Infra Red Radiation
Based on transmission by modulated infra-red radiation.
Has a wavelength just above that of visible light.
Like visible light, it is reflected from hard surfaces, yet passes through
translucent materials such as glass.
Radiators are used to emission infra-red light with a wavelength of 870 nm.
Security Systems
3
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Infra- Red spectrum in relation to other spectra
%
100
75
1
50
25
4
5
2
0
400
500
600
700
3
800
1000 nm
1
Daylight spectrum 2 Sensitivity of the human eye 3 Intra- Red radiator
4
Sensitivity of the Infra- Red diode at the receiver
5
Sensitivity of the Infra- Red diode at the receiver with daylight filter
Security Systems
4
870 900
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Signal Processing
Audio
Channel 01
A/D Conversion
& Compression
4x
4x
Audio
Channel 04
Protocol Creation
& Modulation
A/D Conversion
& Compression
The Integrus system uses high frequency carrier signals (typically 2-8 MHz)
to prevent interference problems with modern light sources.
The transmission system converts analogue audio signals to digital
frequency modulated infra-red light.
The digital audio processing guarantees a constant high audio quality.
Receivers pick up the digital frequency modulated infra-red signal and
convert it back to an audio signal for a headphone.
Security Systems
5
Carrier
(to IR Radiator)
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Signal Processing main steps
1. A/D conversion - Each analogue audio channel is converted to a digital
signal.
2. Compression - To increase the amount of digital information.
3. Protocol Creation - Groups of four digital signals are combined into one
digital information stream. Fault algorithm information is added for fault
detection and correction.
4. Modulation - A high frequency carrier signal is phase-modulated with
the digital information stream.
5. Radiation – Up to 8 modulated carrier signals are combined and sent to
the infra-red radiators, which convert the carrier signals to modulated
infra-red light.
6. De-Modulation – a reversed process is used in the IR receivers to
convert the modulated infra-red light to separate analogue audio
channels.
Security Systems
6
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Audio Channel Quality modes
Up to four different audio channel quality modes:
1)
Mono, standard quality, maximum 32 channels of 10kHz
2)
Mono, premium quality, maximum 16 channels of 20kHz
3)
Stereo,standard quality, maximum 16 channels of 2x 10kHz
4)
Stereo,premium quality, maximum 8 channels of 2x 20kHz
The Standard quality mode uses less bandwidth and can be used for
transmitting speech.
For music the Premium quality mode is advisable.
Security Systems
7
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Carriers and Channels
Up to 8 different carrier signals (depending on the transmitter type) can
be transmit. Each carrier can contain up to 4 different audio channels.
The maximum number of channels per carrier is dependent on the
chosen quality modes.
Per carrier a mix of channels with different quality modes is possible, as
long as the total available bandwidth is not exceeded.
Security Systems
8
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Carriers and Channels
This table lists all possible channel combinations per carrier:
Channel Quality
10kHz
10kHz
10kHz
10kHz
10kHz
10kHz
10kHz
Mono SQ
20kHz
20kHz
10kHz (L)
10kHz
10kHz (R)
10kHz (L)
10kHz (R)
10kHz (L)
10kHz (R)
10kHz (L)
10kHz (R)
20kHz
20kHz
20kHz (L)
20kHz (R)
Carrier
Security Systems
9
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Mono PQ
Stereo SQ
Stereo PQ
Carriers and Channels
Carrier Allocation
-3 d B
2 .3 3 3
3
3 .6 6 7
4 .3 3 3
5
5 .6 6 7
6 .3 3 3
G u a rd b a n d
f (M H z )
The data is digitally modulated onto the carriers. The modulation method
used is DQPSK (Differential Quadrature Phase Shift Keying) with coherent
detection at the receiver.
The information is carried by the phase changes.
Security Systems
10
7
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Audio Encoding and Quality
All audio sent by the transmitter, is compressed by a sub-band APCM
(Adaptive Pulse Code Modulation) encoder.
System Audio Performance
Measured from the audio input of an LBB4503 to the headphone output of
an LBB4540
Audio frequency response:
Standard Quality mode………………...
: 20 Hz to 10 kHz (-3 dB)
Premium Quality…………….………….
: 20 Hz to 20 kHz (-3 dB)
Total harmonic distortion at 1kHz …
: < 0.05 %
Crosstalk attenuation at 4 kHz….….
: > 80 dB
Dynamic range………………………..
: > 80 dB
Weighted signal-to-noise ratio……..
: > 80 dB(A)
Security Systems
11
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
I&O Manual
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Transmission Protocol
Protocol and modulation technique :
according to IEC 61603 part 7
Carrier structure
Each carrier contains:
synchronization information
audio slots
data slot(s)
A Reed-Solomon RS coder is applied to protect the audio and data
information for transmission errors.
Security Systems
12
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Transmission Protocol
With four Standard Quality channels
Audio slot A
Audio slot B
SQ
Audio slot A
SYNC
RS frame 0
RS frame 1
RS frame 2
SQ
Audio slot B
SQ
RS frame 3
RS frame 4
1 super frame
Security Systems
13
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
data
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
RS parity
SQ
data
RS frame 5
RS parity
Transmission Protocol
With two Premium Quality channels
Audio slot A
PQ
Audio slot A
SYNC
RS frame 0
RS frame 1
RS frame 2
Audio slot B
PQ
RS frame 3
data
Audio slot B
RS frame 4
1 super frame
Security Systems
14
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
RS parity
data
RS frame 5
RS parity
System Technology
End of section
Security Systems
15
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Slide 11
System Technology
System Block Diagram
Infra-Red Radiation
Signal Processing
Audio Channel Quality Modes
Carriers and Channels
Audio Encoding and Quality
Transmission Protocol
Security Systems
1
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
I&O Manual
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Diagram Digital Infra-Red Transmission System
Transmission Protocol
DCN Next
Generation
DCN
system
Integrus
Transmitter
Up to 32
Interpreters
desks 6ch.
Audio
sources
Channels
Integrus
Radiator
Integrus
Receiver
Integrus
Radiator
Integrus
Receiver
Integrus
Radiator
Integrus
Receiver
Integrus
Radiator
Integrus
Receiver
Integrus
Charging equipment
Security Systems
2
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Infra Red Radiation
Based on transmission by modulated infra-red radiation.
Has a wavelength just above that of visible light.
Like visible light, it is reflected from hard surfaces, yet passes through
translucent materials such as glass.
Radiators are used to emission infra-red light with a wavelength of 870 nm.
Security Systems
3
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Infra- Red spectrum in relation to other spectra
%
100
75
1
50
25
4
5
2
0
400
500
600
700
3
800
1000 nm
1
Daylight spectrum 2 Sensitivity of the human eye 3 Intra- Red radiator
4
Sensitivity of the Infra- Red diode at the receiver
5
Sensitivity of the Infra- Red diode at the receiver with daylight filter
Security Systems
4
870 900
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Signal Processing
Audio
Channel 01
A/D Conversion
& Compression
4x
4x
Audio
Channel 04
Protocol Creation
& Modulation
A/D Conversion
& Compression
The Integrus system uses high frequency carrier signals (typically 2-8 MHz)
to prevent interference problems with modern light sources.
The transmission system converts analogue audio signals to digital
frequency modulated infra-red light.
The digital audio processing guarantees a constant high audio quality.
Receivers pick up the digital frequency modulated infra-red signal and
convert it back to an audio signal for a headphone.
Security Systems
5
Carrier
(to IR Radiator)
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Signal Processing main steps
1. A/D conversion - Each analogue audio channel is converted to a digital
signal.
2. Compression - To increase the amount of digital information.
3. Protocol Creation - Groups of four digital signals are combined into one
digital information stream. Fault algorithm information is added for fault
detection and correction.
4. Modulation - A high frequency carrier signal is phase-modulated with
the digital information stream.
5. Radiation – Up to 8 modulated carrier signals are combined and sent to
the infra-red radiators, which convert the carrier signals to modulated
infra-red light.
6. De-Modulation – a reversed process is used in the IR receivers to
convert the modulated infra-red light to separate analogue audio
channels.
Security Systems
6
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Audio Channel Quality modes
Up to four different audio channel quality modes:
1)
Mono, standard quality, maximum 32 channels of 10kHz
2)
Mono, premium quality, maximum 16 channels of 20kHz
3)
Stereo,standard quality, maximum 16 channels of 2x 10kHz
4)
Stereo,premium quality, maximum 8 channels of 2x 20kHz
The Standard quality mode uses less bandwidth and can be used for
transmitting speech.
For music the Premium quality mode is advisable.
Security Systems
7
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Carriers and Channels
Up to 8 different carrier signals (depending on the transmitter type) can
be transmit. Each carrier can contain up to 4 different audio channels.
The maximum number of channels per carrier is dependent on the
chosen quality modes.
Per carrier a mix of channels with different quality modes is possible, as
long as the total available bandwidth is not exceeded.
Security Systems
8
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Carriers and Channels
This table lists all possible channel combinations per carrier:
Channel Quality
10kHz
10kHz
10kHz
10kHz
10kHz
10kHz
10kHz
Mono SQ
20kHz
20kHz
10kHz (L)
10kHz
10kHz (R)
10kHz (L)
10kHz (R)
10kHz (L)
10kHz (R)
10kHz (L)
10kHz (R)
20kHz
20kHz
20kHz (L)
20kHz (R)
Carrier
Security Systems
9
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Mono PQ
Stereo SQ
Stereo PQ
Carriers and Channels
Carrier Allocation
-3 d B
2 .3 3 3
3
3 .6 6 7
4 .3 3 3
5
5 .6 6 7
6 .3 3 3
G u a rd b a n d
f (M H z )
The data is digitally modulated onto the carriers. The modulation method
used is DQPSK (Differential Quadrature Phase Shift Keying) with coherent
detection at the receiver.
The information is carried by the phase changes.
Security Systems
10
7
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Audio Encoding and Quality
All audio sent by the transmitter, is compressed by a sub-band APCM
(Adaptive Pulse Code Modulation) encoder.
System Audio Performance
Measured from the audio input of an LBB4503 to the headphone output of
an LBB4540
Audio frequency response:
Standard Quality mode………………...
: 20 Hz to 10 kHz (-3 dB)
Premium Quality…………….………….
: 20 Hz to 20 kHz (-3 dB)
Total harmonic distortion at 1kHz …
: < 0.05 %
Crosstalk attenuation at 4 kHz….….
: > 80 dB
Dynamic range………………………..
: > 80 dB
Weighted signal-to-noise ratio……..
: > 80 dB(A)
Security Systems
11
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
I&O Manual
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Transmission Protocol
Protocol and modulation technique :
according to IEC 61603 part 7
Carrier structure
Each carrier contains:
synchronization information
audio slots
data slot(s)
A Reed-Solomon RS coder is applied to protect the audio and data
information for transmission errors.
Security Systems
12
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Transmission Protocol
With four Standard Quality channels
Audio slot A
Audio slot B
SQ
Audio slot A
SYNC
RS frame 0
RS frame 1
RS frame 2
SQ
Audio slot B
SQ
RS frame 3
RS frame 4
1 super frame
Security Systems
13
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
data
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
RS parity
SQ
data
RS frame 5
RS parity
Transmission Protocol
With two Premium Quality channels
Audio slot A
PQ
Audio slot A
SYNC
RS frame 0
RS frame 1
RS frame 2
Audio slot B
PQ
RS frame 3
data
Audio slot B
RS frame 4
1 super frame
Security Systems
14
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
RS parity
data
RS frame 5
RS parity
System Technology
End of section
Security Systems
15
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Slide 12
System Technology
System Block Diagram
Infra-Red Radiation
Signal Processing
Audio Channel Quality Modes
Carriers and Channels
Audio Encoding and Quality
Transmission Protocol
Security Systems
1
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
I&O Manual
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Diagram Digital Infra-Red Transmission System
Transmission Protocol
DCN Next
Generation
DCN
system
Integrus
Transmitter
Up to 32
Interpreters
desks 6ch.
Audio
sources
Channels
Integrus
Radiator
Integrus
Receiver
Integrus
Radiator
Integrus
Receiver
Integrus
Radiator
Integrus
Receiver
Integrus
Radiator
Integrus
Receiver
Integrus
Charging equipment
Security Systems
2
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Infra Red Radiation
Based on transmission by modulated infra-red radiation.
Has a wavelength just above that of visible light.
Like visible light, it is reflected from hard surfaces, yet passes through
translucent materials such as glass.
Radiators are used to emission infra-red light with a wavelength of 870 nm.
Security Systems
3
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Infra- Red spectrum in relation to other spectra
%
100
75
1
50
25
4
5
2
0
400
500
600
700
3
800
1000 nm
1
Daylight spectrum 2 Sensitivity of the human eye 3 Intra- Red radiator
4
Sensitivity of the Infra- Red diode at the receiver
5
Sensitivity of the Infra- Red diode at the receiver with daylight filter
Security Systems
4
870 900
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Signal Processing
Audio
Channel 01
A/D Conversion
& Compression
4x
4x
Audio
Channel 04
Protocol Creation
& Modulation
A/D Conversion
& Compression
The Integrus system uses high frequency carrier signals (typically 2-8 MHz)
to prevent interference problems with modern light sources.
The transmission system converts analogue audio signals to digital
frequency modulated infra-red light.
The digital audio processing guarantees a constant high audio quality.
Receivers pick up the digital frequency modulated infra-red signal and
convert it back to an audio signal for a headphone.
Security Systems
5
Carrier
(to IR Radiator)
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Signal Processing main steps
1. A/D conversion - Each analogue audio channel is converted to a digital
signal.
2. Compression - To increase the amount of digital information.
3. Protocol Creation - Groups of four digital signals are combined into one
digital information stream. Fault algorithm information is added for fault
detection and correction.
4. Modulation - A high frequency carrier signal is phase-modulated with
the digital information stream.
5. Radiation – Up to 8 modulated carrier signals are combined and sent to
the infra-red radiators, which convert the carrier signals to modulated
infra-red light.
6. De-Modulation – a reversed process is used in the IR receivers to
convert the modulated infra-red light to separate analogue audio
channels.
Security Systems
6
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Audio Channel Quality modes
Up to four different audio channel quality modes:
1)
Mono, standard quality, maximum 32 channels of 10kHz
2)
Mono, premium quality, maximum 16 channels of 20kHz
3)
Stereo,standard quality, maximum 16 channels of 2x 10kHz
4)
Stereo,premium quality, maximum 8 channels of 2x 20kHz
The Standard quality mode uses less bandwidth and can be used for
transmitting speech.
For music the Premium quality mode is advisable.
Security Systems
7
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Carriers and Channels
Up to 8 different carrier signals (depending on the transmitter type) can
be transmit. Each carrier can contain up to 4 different audio channels.
The maximum number of channels per carrier is dependent on the
chosen quality modes.
Per carrier a mix of channels with different quality modes is possible, as
long as the total available bandwidth is not exceeded.
Security Systems
8
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Carriers and Channels
This table lists all possible channel combinations per carrier:
Channel Quality
10kHz
10kHz
10kHz
10kHz
10kHz
10kHz
10kHz
Mono SQ
20kHz
20kHz
10kHz (L)
10kHz
10kHz (R)
10kHz (L)
10kHz (R)
10kHz (L)
10kHz (R)
10kHz (L)
10kHz (R)
20kHz
20kHz
20kHz (L)
20kHz (R)
Carrier
Security Systems
9
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Mono PQ
Stereo SQ
Stereo PQ
Carriers and Channels
Carrier Allocation
-3 d B
2 .3 3 3
3
3 .6 6 7
4 .3 3 3
5
5 .6 6 7
6 .3 3 3
G u a rd b a n d
f (M H z )
The data is digitally modulated onto the carriers. The modulation method
used is DQPSK (Differential Quadrature Phase Shift Keying) with coherent
detection at the receiver.
The information is carried by the phase changes.
Security Systems
10
7
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Audio Encoding and Quality
All audio sent by the transmitter, is compressed by a sub-band APCM
(Adaptive Pulse Code Modulation) encoder.
System Audio Performance
Measured from the audio input of an LBB4503 to the headphone output of
an LBB4540
Audio frequency response:
Standard Quality mode………………...
: 20 Hz to 10 kHz (-3 dB)
Premium Quality…………….………….
: 20 Hz to 20 kHz (-3 dB)
Total harmonic distortion at 1kHz …
: < 0.05 %
Crosstalk attenuation at 4 kHz….….
: > 80 dB
Dynamic range………………………..
: > 80 dB
Weighted signal-to-noise ratio……..
: > 80 dB(A)
Security Systems
11
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
I&O Manual
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Transmission Protocol
Protocol and modulation technique :
according to IEC 61603 part 7
Carrier structure
Each carrier contains:
synchronization information
audio slots
data slot(s)
A Reed-Solomon RS coder is applied to protect the audio and data
information for transmission errors.
Security Systems
12
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Transmission Protocol
With four Standard Quality channels
Audio slot A
Audio slot B
SQ
Audio slot A
SYNC
RS frame 0
RS frame 1
RS frame 2
SQ
Audio slot B
SQ
RS frame 3
RS frame 4
1 super frame
Security Systems
13
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
data
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
RS parity
SQ
data
RS frame 5
RS parity
Transmission Protocol
With two Premium Quality channels
Audio slot A
PQ
Audio slot A
SYNC
RS frame 0
RS frame 1
RS frame 2
Audio slot B
PQ
RS frame 3
data
Audio slot B
RS frame 4
1 super frame
Security Systems
14
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
RS parity
data
RS frame 5
RS parity
System Technology
End of section
Security Systems
15
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Slide 13
System Technology
System Block Diagram
Infra-Red Radiation
Signal Processing
Audio Channel Quality Modes
Carriers and Channels
Audio Encoding and Quality
Transmission Protocol
Security Systems
1
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
I&O Manual
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Diagram Digital Infra-Red Transmission System
Transmission Protocol
DCN Next
Generation
DCN
system
Integrus
Transmitter
Up to 32
Interpreters
desks 6ch.
Audio
sources
Channels
Integrus
Radiator
Integrus
Receiver
Integrus
Radiator
Integrus
Receiver
Integrus
Radiator
Integrus
Receiver
Integrus
Radiator
Integrus
Receiver
Integrus
Charging equipment
Security Systems
2
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Infra Red Radiation
Based on transmission by modulated infra-red radiation.
Has a wavelength just above that of visible light.
Like visible light, it is reflected from hard surfaces, yet passes through
translucent materials such as glass.
Radiators are used to emission infra-red light with a wavelength of 870 nm.
Security Systems
3
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Infra- Red spectrum in relation to other spectra
%
100
75
1
50
25
4
5
2
0
400
500
600
700
3
800
1000 nm
1
Daylight spectrum 2 Sensitivity of the human eye 3 Intra- Red radiator
4
Sensitivity of the Infra- Red diode at the receiver
5
Sensitivity of the Infra- Red diode at the receiver with daylight filter
Security Systems
4
870 900
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Signal Processing
Audio
Channel 01
A/D Conversion
& Compression
4x
4x
Audio
Channel 04
Protocol Creation
& Modulation
A/D Conversion
& Compression
The Integrus system uses high frequency carrier signals (typically 2-8 MHz)
to prevent interference problems with modern light sources.
The transmission system converts analogue audio signals to digital
frequency modulated infra-red light.
The digital audio processing guarantees a constant high audio quality.
Receivers pick up the digital frequency modulated infra-red signal and
convert it back to an audio signal for a headphone.
Security Systems
5
Carrier
(to IR Radiator)
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Signal Processing main steps
1. A/D conversion - Each analogue audio channel is converted to a digital
signal.
2. Compression - To increase the amount of digital information.
3. Protocol Creation - Groups of four digital signals are combined into one
digital information stream. Fault algorithm information is added for fault
detection and correction.
4. Modulation - A high frequency carrier signal is phase-modulated with
the digital information stream.
5. Radiation – Up to 8 modulated carrier signals are combined and sent to
the infra-red radiators, which convert the carrier signals to modulated
infra-red light.
6. De-Modulation – a reversed process is used in the IR receivers to
convert the modulated infra-red light to separate analogue audio
channels.
Security Systems
6
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Audio Channel Quality modes
Up to four different audio channel quality modes:
1)
Mono, standard quality, maximum 32 channels of 10kHz
2)
Mono, premium quality, maximum 16 channels of 20kHz
3)
Stereo,standard quality, maximum 16 channels of 2x 10kHz
4)
Stereo,premium quality, maximum 8 channels of 2x 20kHz
The Standard quality mode uses less bandwidth and can be used for
transmitting speech.
For music the Premium quality mode is advisable.
Security Systems
7
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Carriers and Channels
Up to 8 different carrier signals (depending on the transmitter type) can
be transmit. Each carrier can contain up to 4 different audio channels.
The maximum number of channels per carrier is dependent on the
chosen quality modes.
Per carrier a mix of channels with different quality modes is possible, as
long as the total available bandwidth is not exceeded.
Security Systems
8
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Carriers and Channels
This table lists all possible channel combinations per carrier:
Channel Quality
10kHz
10kHz
10kHz
10kHz
10kHz
10kHz
10kHz
Mono SQ
20kHz
20kHz
10kHz (L)
10kHz
10kHz (R)
10kHz (L)
10kHz (R)
10kHz (L)
10kHz (R)
10kHz (L)
10kHz (R)
20kHz
20kHz
20kHz (L)
20kHz (R)
Carrier
Security Systems
9
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Mono PQ
Stereo SQ
Stereo PQ
Carriers and Channels
Carrier Allocation
-3 d B
2 .3 3 3
3
3 .6 6 7
4 .3 3 3
5
5 .6 6 7
6 .3 3 3
G u a rd b a n d
f (M H z )
The data is digitally modulated onto the carriers. The modulation method
used is DQPSK (Differential Quadrature Phase Shift Keying) with coherent
detection at the receiver.
The information is carried by the phase changes.
Security Systems
10
7
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Audio Encoding and Quality
All audio sent by the transmitter, is compressed by a sub-band APCM
(Adaptive Pulse Code Modulation) encoder.
System Audio Performance
Measured from the audio input of an LBB4503 to the headphone output of
an LBB4540
Audio frequency response:
Standard Quality mode………………...
: 20 Hz to 10 kHz (-3 dB)
Premium Quality…………….………….
: 20 Hz to 20 kHz (-3 dB)
Total harmonic distortion at 1kHz …
: < 0.05 %
Crosstalk attenuation at 4 kHz….….
: > 80 dB
Dynamic range………………………..
: > 80 dB
Weighted signal-to-noise ratio……..
: > 80 dB(A)
Security Systems
11
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
I&O Manual
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Transmission Protocol
Protocol and modulation technique :
according to IEC 61603 part 7
Carrier structure
Each carrier contains:
synchronization information
audio slots
data slot(s)
A Reed-Solomon RS coder is applied to protect the audio and data
information for transmission errors.
Security Systems
12
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Transmission Protocol
With four Standard Quality channels
Audio slot A
Audio slot B
SQ
Audio slot A
SYNC
RS frame 0
RS frame 1
RS frame 2
SQ
Audio slot B
SQ
RS frame 3
RS frame 4
1 super frame
Security Systems
13
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
data
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
RS parity
SQ
data
RS frame 5
RS parity
Transmission Protocol
With two Premium Quality channels
Audio slot A
PQ
Audio slot A
SYNC
RS frame 0
RS frame 1
RS frame 2
Audio slot B
PQ
RS frame 3
data
Audio slot B
RS frame 4
1 super frame
Security Systems
14
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
RS parity
data
RS frame 5
RS parity
System Technology
End of section
Security Systems
15
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Slide 14
System Technology
System Block Diagram
Infra-Red Radiation
Signal Processing
Audio Channel Quality Modes
Carriers and Channels
Audio Encoding and Quality
Transmission Protocol
Security Systems
1
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
I&O Manual
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Diagram Digital Infra-Red Transmission System
Transmission Protocol
DCN Next
Generation
DCN
system
Integrus
Transmitter
Up to 32
Interpreters
desks 6ch.
Audio
sources
Channels
Integrus
Radiator
Integrus
Receiver
Integrus
Radiator
Integrus
Receiver
Integrus
Radiator
Integrus
Receiver
Integrus
Radiator
Integrus
Receiver
Integrus
Charging equipment
Security Systems
2
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Infra Red Radiation
Based on transmission by modulated infra-red radiation.
Has a wavelength just above that of visible light.
Like visible light, it is reflected from hard surfaces, yet passes through
translucent materials such as glass.
Radiators are used to emission infra-red light with a wavelength of 870 nm.
Security Systems
3
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Infra- Red spectrum in relation to other spectra
%
100
75
1
50
25
4
5
2
0
400
500
600
700
3
800
1000 nm
1
Daylight spectrum 2 Sensitivity of the human eye 3 Intra- Red radiator
4
Sensitivity of the Infra- Red diode at the receiver
5
Sensitivity of the Infra- Red diode at the receiver with daylight filter
Security Systems
4
870 900
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Signal Processing
Audio
Channel 01
A/D Conversion
& Compression
4x
4x
Audio
Channel 04
Protocol Creation
& Modulation
A/D Conversion
& Compression
The Integrus system uses high frequency carrier signals (typically 2-8 MHz)
to prevent interference problems with modern light sources.
The transmission system converts analogue audio signals to digital
frequency modulated infra-red light.
The digital audio processing guarantees a constant high audio quality.
Receivers pick up the digital frequency modulated infra-red signal and
convert it back to an audio signal for a headphone.
Security Systems
5
Carrier
(to IR Radiator)
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Signal Processing main steps
1. A/D conversion - Each analogue audio channel is converted to a digital
signal.
2. Compression - To increase the amount of digital information.
3. Protocol Creation - Groups of four digital signals are combined into one
digital information stream. Fault algorithm information is added for fault
detection and correction.
4. Modulation - A high frequency carrier signal is phase-modulated with
the digital information stream.
5. Radiation – Up to 8 modulated carrier signals are combined and sent to
the infra-red radiators, which convert the carrier signals to modulated
infra-red light.
6. De-Modulation – a reversed process is used in the IR receivers to
convert the modulated infra-red light to separate analogue audio
channels.
Security Systems
6
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Audio Channel Quality modes
Up to four different audio channel quality modes:
1)
Mono, standard quality, maximum 32 channels of 10kHz
2)
Mono, premium quality, maximum 16 channels of 20kHz
3)
Stereo,standard quality, maximum 16 channels of 2x 10kHz
4)
Stereo,premium quality, maximum 8 channels of 2x 20kHz
The Standard quality mode uses less bandwidth and can be used for
transmitting speech.
For music the Premium quality mode is advisable.
Security Systems
7
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Carriers and Channels
Up to 8 different carrier signals (depending on the transmitter type) can
be transmit. Each carrier can contain up to 4 different audio channels.
The maximum number of channels per carrier is dependent on the
chosen quality modes.
Per carrier a mix of channels with different quality modes is possible, as
long as the total available bandwidth is not exceeded.
Security Systems
8
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Carriers and Channels
This table lists all possible channel combinations per carrier:
Channel Quality
10kHz
10kHz
10kHz
10kHz
10kHz
10kHz
10kHz
Mono SQ
20kHz
20kHz
10kHz (L)
10kHz
10kHz (R)
10kHz (L)
10kHz (R)
10kHz (L)
10kHz (R)
10kHz (L)
10kHz (R)
20kHz
20kHz
20kHz (L)
20kHz (R)
Carrier
Security Systems
9
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Mono PQ
Stereo SQ
Stereo PQ
Carriers and Channels
Carrier Allocation
-3 d B
2 .3 3 3
3
3 .6 6 7
4 .3 3 3
5
5 .6 6 7
6 .3 3 3
G u a rd b a n d
f (M H z )
The data is digitally modulated onto the carriers. The modulation method
used is DQPSK (Differential Quadrature Phase Shift Keying) with coherent
detection at the receiver.
The information is carried by the phase changes.
Security Systems
10
7
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Audio Encoding and Quality
All audio sent by the transmitter, is compressed by a sub-band APCM
(Adaptive Pulse Code Modulation) encoder.
System Audio Performance
Measured from the audio input of an LBB4503 to the headphone output of
an LBB4540
Audio frequency response:
Standard Quality mode………………...
: 20 Hz to 10 kHz (-3 dB)
Premium Quality…………….………….
: 20 Hz to 20 kHz (-3 dB)
Total harmonic distortion at 1kHz …
: < 0.05 %
Crosstalk attenuation at 4 kHz….….
: > 80 dB
Dynamic range………………………..
: > 80 dB
Weighted signal-to-noise ratio……..
: > 80 dB(A)
Security Systems
11
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
I&O Manual
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Transmission Protocol
Protocol and modulation technique :
according to IEC 61603 part 7
Carrier structure
Each carrier contains:
synchronization information
audio slots
data slot(s)
A Reed-Solomon RS coder is applied to protect the audio and data
information for transmission errors.
Security Systems
12
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Transmission Protocol
With four Standard Quality channels
Audio slot A
Audio slot B
SQ
Audio slot A
SYNC
RS frame 0
RS frame 1
RS frame 2
SQ
Audio slot B
SQ
RS frame 3
RS frame 4
1 super frame
Security Systems
13
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
data
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
RS parity
SQ
data
RS frame 5
RS parity
Transmission Protocol
With two Premium Quality channels
Audio slot A
PQ
Audio slot A
SYNC
RS frame 0
RS frame 1
RS frame 2
Audio slot B
PQ
RS frame 3
data
Audio slot B
RS frame 4
1 super frame
Security Systems
14
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
RS parity
data
RS frame 5
RS parity
System Technology
End of section
Security Systems
15
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Slide 15
System Technology
System Block Diagram
Infra-Red Radiation
Signal Processing
Audio Channel Quality Modes
Carriers and Channels
Audio Encoding and Quality
Transmission Protocol
Security Systems
1
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
I&O Manual
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Diagram Digital Infra-Red Transmission System
Transmission Protocol
DCN Next
Generation
DCN
system
Integrus
Transmitter
Up to 32
Interpreters
desks 6ch.
Audio
sources
Channels
Integrus
Radiator
Integrus
Receiver
Integrus
Radiator
Integrus
Receiver
Integrus
Radiator
Integrus
Receiver
Integrus
Radiator
Integrus
Receiver
Integrus
Charging equipment
Security Systems
2
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Infra Red Radiation
Based on transmission by modulated infra-red radiation.
Has a wavelength just above that of visible light.
Like visible light, it is reflected from hard surfaces, yet passes through
translucent materials such as glass.
Radiators are used to emission infra-red light with a wavelength of 870 nm.
Security Systems
3
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Infra- Red spectrum in relation to other spectra
%
100
75
1
50
25
4
5
2
0
400
500
600
700
3
800
1000 nm
1
Daylight spectrum 2 Sensitivity of the human eye 3 Intra- Red radiator
4
Sensitivity of the Infra- Red diode at the receiver
5
Sensitivity of the Infra- Red diode at the receiver with daylight filter
Security Systems
4
870 900
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Signal Processing
Audio
Channel 01
A/D Conversion
& Compression
4x
4x
Audio
Channel 04
Protocol Creation
& Modulation
A/D Conversion
& Compression
The Integrus system uses high frequency carrier signals (typically 2-8 MHz)
to prevent interference problems with modern light sources.
The transmission system converts analogue audio signals to digital
frequency modulated infra-red light.
The digital audio processing guarantees a constant high audio quality.
Receivers pick up the digital frequency modulated infra-red signal and
convert it back to an audio signal for a headphone.
Security Systems
5
Carrier
(to IR Radiator)
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Signal Processing main steps
1. A/D conversion - Each analogue audio channel is converted to a digital
signal.
2. Compression - To increase the amount of digital information.
3. Protocol Creation - Groups of four digital signals are combined into one
digital information stream. Fault algorithm information is added for fault
detection and correction.
4. Modulation - A high frequency carrier signal is phase-modulated with
the digital information stream.
5. Radiation – Up to 8 modulated carrier signals are combined and sent to
the infra-red radiators, which convert the carrier signals to modulated
infra-red light.
6. De-Modulation – a reversed process is used in the IR receivers to
convert the modulated infra-red light to separate analogue audio
channels.
Security Systems
6
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Audio Channel Quality modes
Up to four different audio channel quality modes:
1)
Mono, standard quality, maximum 32 channels of 10kHz
2)
Mono, premium quality, maximum 16 channels of 20kHz
3)
Stereo,standard quality, maximum 16 channels of 2x 10kHz
4)
Stereo,premium quality, maximum 8 channels of 2x 20kHz
The Standard quality mode uses less bandwidth and can be used for
transmitting speech.
For music the Premium quality mode is advisable.
Security Systems
7
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Carriers and Channels
Up to 8 different carrier signals (depending on the transmitter type) can
be transmit. Each carrier can contain up to 4 different audio channels.
The maximum number of channels per carrier is dependent on the
chosen quality modes.
Per carrier a mix of channels with different quality modes is possible, as
long as the total available bandwidth is not exceeded.
Security Systems
8
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Carriers and Channels
This table lists all possible channel combinations per carrier:
Channel Quality
10kHz
10kHz
10kHz
10kHz
10kHz
10kHz
10kHz
Mono SQ
20kHz
20kHz
10kHz (L)
10kHz
10kHz (R)
10kHz (L)
10kHz (R)
10kHz (L)
10kHz (R)
10kHz (L)
10kHz (R)
20kHz
20kHz
20kHz (L)
20kHz (R)
Carrier
Security Systems
9
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Mono PQ
Stereo SQ
Stereo PQ
Carriers and Channels
Carrier Allocation
-3 d B
2 .3 3 3
3
3 .6 6 7
4 .3 3 3
5
5 .6 6 7
6 .3 3 3
G u a rd b a n d
f (M H z )
The data is digitally modulated onto the carriers. The modulation method
used is DQPSK (Differential Quadrature Phase Shift Keying) with coherent
detection at the receiver.
The information is carried by the phase changes.
Security Systems
10
7
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Audio Encoding and Quality
All audio sent by the transmitter, is compressed by a sub-band APCM
(Adaptive Pulse Code Modulation) encoder.
System Audio Performance
Measured from the audio input of an LBB4503 to the headphone output of
an LBB4540
Audio frequency response:
Standard Quality mode………………...
: 20 Hz to 10 kHz (-3 dB)
Premium Quality…………….………….
: 20 Hz to 20 kHz (-3 dB)
Total harmonic distortion at 1kHz …
: < 0.05 %
Crosstalk attenuation at 4 kHz….….
: > 80 dB
Dynamic range………………………..
: > 80 dB
Weighted signal-to-noise ratio……..
: > 80 dB(A)
Security Systems
11
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
I&O Manual
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Transmission Protocol
Protocol and modulation technique :
according to IEC 61603 part 7
Carrier structure
Each carrier contains:
synchronization information
audio slots
data slot(s)
A Reed-Solomon RS coder is applied to protect the audio and data
information for transmission errors.
Security Systems
12
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Transmission Protocol
With four Standard Quality channels
Audio slot A
Audio slot B
SQ
Audio slot A
SYNC
RS frame 0
RS frame 1
RS frame 2
SQ
Audio slot B
SQ
RS frame 3
RS frame 4
1 super frame
Security Systems
13
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
data
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
RS parity
SQ
data
RS frame 5
RS parity
Transmission Protocol
With two Premium Quality channels
Audio slot A
PQ
Audio slot A
SYNC
RS frame 0
RS frame 1
RS frame 2
Audio slot B
PQ
RS frame 3
data
Audio slot B
RS frame 4
1 super frame
Security Systems
14
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
RS parity
data
RS frame 5
RS parity
System Technology
End of section
Security Systems
15
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
System Technology
System Block Diagram
Infra-Red Radiation
Signal Processing
Audio Channel Quality Modes
Carriers and Channels
Audio Encoding and Quality
Transmission Protocol
Security Systems
1
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
I&O Manual
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Diagram Digital Infra-Red Transmission System
Transmission Protocol
DCN Next
Generation
DCN
system
Integrus
Transmitter
Up to 32
Interpreters
desks 6ch.
Audio
sources
Channels
Integrus
Radiator
Integrus
Receiver
Integrus
Radiator
Integrus
Receiver
Integrus
Radiator
Integrus
Receiver
Integrus
Radiator
Integrus
Receiver
Integrus
Charging equipment
Security Systems
2
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Infra Red Radiation
Based on transmission by modulated infra-red radiation.
Has a wavelength just above that of visible light.
Like visible light, it is reflected from hard surfaces, yet passes through
translucent materials such as glass.
Radiators are used to emission infra-red light with a wavelength of 870 nm.
Security Systems
3
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Infra- Red spectrum in relation to other spectra
%
100
75
1
50
25
4
5
2
0
400
500
600
700
3
800
1000 nm
1
Daylight spectrum 2 Sensitivity of the human eye 3 Intra- Red radiator
4
Sensitivity of the Infra- Red diode at the receiver
5
Sensitivity of the Infra- Red diode at the receiver with daylight filter
Security Systems
4
870 900
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Signal Processing
Audio
Channel 01
A/D Conversion
& Compression
4x
4x
Audio
Channel 04
Protocol Creation
& Modulation
A/D Conversion
& Compression
The Integrus system uses high frequency carrier signals (typically 2-8 MHz)
to prevent interference problems with modern light sources.
The transmission system converts analogue audio signals to digital
frequency modulated infra-red light.
The digital audio processing guarantees a constant high audio quality.
Receivers pick up the digital frequency modulated infra-red signal and
convert it back to an audio signal for a headphone.
Security Systems
5
Carrier
(to IR Radiator)
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Signal Processing main steps
1. A/D conversion - Each analogue audio channel is converted to a digital
signal.
2. Compression - To increase the amount of digital information.
3. Protocol Creation - Groups of four digital signals are combined into one
digital information stream. Fault algorithm information is added for fault
detection and correction.
4. Modulation - A high frequency carrier signal is phase-modulated with
the digital information stream.
5. Radiation – Up to 8 modulated carrier signals are combined and sent to
the infra-red radiators, which convert the carrier signals to modulated
infra-red light.
6. De-Modulation – a reversed process is used in the IR receivers to
convert the modulated infra-red light to separate analogue audio
channels.
Security Systems
6
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Audio Channel Quality modes
Up to four different audio channel quality modes:
1)
Mono, standard quality, maximum 32 channels of 10kHz
2)
Mono, premium quality, maximum 16 channels of 20kHz
3)
Stereo,standard quality, maximum 16 channels of 2x 10kHz
4)
Stereo,premium quality, maximum 8 channels of 2x 20kHz
The Standard quality mode uses less bandwidth and can be used for
transmitting speech.
For music the Premium quality mode is advisable.
Security Systems
7
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Carriers and Channels
Up to 8 different carrier signals (depending on the transmitter type) can
be transmit. Each carrier can contain up to 4 different audio channels.
The maximum number of channels per carrier is dependent on the
chosen quality modes.
Per carrier a mix of channels with different quality modes is possible, as
long as the total available bandwidth is not exceeded.
Security Systems
8
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Carriers and Channels
This table lists all possible channel combinations per carrier:
Channel Quality
10kHz
10kHz
10kHz
10kHz
10kHz
10kHz
10kHz
Mono SQ
20kHz
20kHz
10kHz (L)
10kHz
10kHz (R)
10kHz (L)
10kHz (R)
10kHz (L)
10kHz (R)
10kHz (L)
10kHz (R)
20kHz
20kHz
20kHz (L)
20kHz (R)
Carrier
Security Systems
9
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Mono PQ
Stereo SQ
Stereo PQ
Carriers and Channels
Carrier Allocation
-3 d B
2 .3 3 3
3
3 .6 6 7
4 .3 3 3
5
5 .6 6 7
6 .3 3 3
G u a rd b a n d
f (M H z )
The data is digitally modulated onto the carriers. The modulation method
used is DQPSK (Differential Quadrature Phase Shift Keying) with coherent
detection at the receiver.
The information is carried by the phase changes.
Security Systems
10
7
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Audio Encoding and Quality
All audio sent by the transmitter, is compressed by a sub-band APCM
(Adaptive Pulse Code Modulation) encoder.
System Audio Performance
Measured from the audio input of an LBB4503 to the headphone output of
an LBB4540
Audio frequency response:
Standard Quality mode………………...
: 20 Hz to 10 kHz (-3 dB)
Premium Quality…………….………….
: 20 Hz to 20 kHz (-3 dB)
Total harmonic distortion at 1kHz …
: < 0.05 %
Crosstalk attenuation at 4 kHz….….
: > 80 dB
Dynamic range………………………..
: > 80 dB
Weighted signal-to-noise ratio……..
: > 80 dB(A)
Security Systems
11
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
I&O Manual
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Transmission Protocol
Protocol and modulation technique :
according to IEC 61603 part 7
Carrier structure
Each carrier contains:
synchronization information
audio slots
data slot(s)
A Reed-Solomon RS coder is applied to protect the audio and data
information for transmission errors.
Security Systems
12
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Transmission Protocol
With four Standard Quality channels
Audio slot A
Audio slot B
SQ
Audio slot A
SYNC
RS frame 0
RS frame 1
RS frame 2
SQ
Audio slot B
SQ
RS frame 3
RS frame 4
1 super frame
Security Systems
13
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
data
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
RS parity
SQ
data
RS frame 5
RS parity
Transmission Protocol
With two Premium Quality channels
Audio slot A
PQ
Audio slot A
SYNC
RS frame 0
RS frame 1
RS frame 2
Audio slot B
PQ
RS frame 3
data
Audio slot B
RS frame 4
1 super frame
Security Systems
14
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
RS parity
data
RS frame 5
RS parity
System Technology
End of section
Security Systems
15
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Slide 2
System Technology
System Block Diagram
Infra-Red Radiation
Signal Processing
Audio Channel Quality Modes
Carriers and Channels
Audio Encoding and Quality
Transmission Protocol
Security Systems
1
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
I&O Manual
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Diagram Digital Infra-Red Transmission System
Transmission Protocol
DCN Next
Generation
DCN
system
Integrus
Transmitter
Up to 32
Interpreters
desks 6ch.
Audio
sources
Channels
Integrus
Radiator
Integrus
Receiver
Integrus
Radiator
Integrus
Receiver
Integrus
Radiator
Integrus
Receiver
Integrus
Radiator
Integrus
Receiver
Integrus
Charging equipment
Security Systems
2
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Infra Red Radiation
Based on transmission by modulated infra-red radiation.
Has a wavelength just above that of visible light.
Like visible light, it is reflected from hard surfaces, yet passes through
translucent materials such as glass.
Radiators are used to emission infra-red light with a wavelength of 870 nm.
Security Systems
3
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Infra- Red spectrum in relation to other spectra
%
100
75
1
50
25
4
5
2
0
400
500
600
700
3
800
1000 nm
1
Daylight spectrum 2 Sensitivity of the human eye 3 Intra- Red radiator
4
Sensitivity of the Infra- Red diode at the receiver
5
Sensitivity of the Infra- Red diode at the receiver with daylight filter
Security Systems
4
870 900
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Signal Processing
Audio
Channel 01
A/D Conversion
& Compression
4x
4x
Audio
Channel 04
Protocol Creation
& Modulation
A/D Conversion
& Compression
The Integrus system uses high frequency carrier signals (typically 2-8 MHz)
to prevent interference problems with modern light sources.
The transmission system converts analogue audio signals to digital
frequency modulated infra-red light.
The digital audio processing guarantees a constant high audio quality.
Receivers pick up the digital frequency modulated infra-red signal and
convert it back to an audio signal for a headphone.
Security Systems
5
Carrier
(to IR Radiator)
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Signal Processing main steps
1. A/D conversion - Each analogue audio channel is converted to a digital
signal.
2. Compression - To increase the amount of digital information.
3. Protocol Creation - Groups of four digital signals are combined into one
digital information stream. Fault algorithm information is added for fault
detection and correction.
4. Modulation - A high frequency carrier signal is phase-modulated with
the digital information stream.
5. Radiation – Up to 8 modulated carrier signals are combined and sent to
the infra-red radiators, which convert the carrier signals to modulated
infra-red light.
6. De-Modulation – a reversed process is used in the IR receivers to
convert the modulated infra-red light to separate analogue audio
channels.
Security Systems
6
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Audio Channel Quality modes
Up to four different audio channel quality modes:
1)
Mono, standard quality, maximum 32 channels of 10kHz
2)
Mono, premium quality, maximum 16 channels of 20kHz
3)
Stereo,standard quality, maximum 16 channels of 2x 10kHz
4)
Stereo,premium quality, maximum 8 channels of 2x 20kHz
The Standard quality mode uses less bandwidth and can be used for
transmitting speech.
For music the Premium quality mode is advisable.
Security Systems
7
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Carriers and Channels
Up to 8 different carrier signals (depending on the transmitter type) can
be transmit. Each carrier can contain up to 4 different audio channels.
The maximum number of channels per carrier is dependent on the
chosen quality modes.
Per carrier a mix of channels with different quality modes is possible, as
long as the total available bandwidth is not exceeded.
Security Systems
8
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Carriers and Channels
This table lists all possible channel combinations per carrier:
Channel Quality
10kHz
10kHz
10kHz
10kHz
10kHz
10kHz
10kHz
Mono SQ
20kHz
20kHz
10kHz (L)
10kHz
10kHz (R)
10kHz (L)
10kHz (R)
10kHz (L)
10kHz (R)
10kHz (L)
10kHz (R)
20kHz
20kHz
20kHz (L)
20kHz (R)
Carrier
Security Systems
9
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Mono PQ
Stereo SQ
Stereo PQ
Carriers and Channels
Carrier Allocation
-3 d B
2 .3 3 3
3
3 .6 6 7
4 .3 3 3
5
5 .6 6 7
6 .3 3 3
G u a rd b a n d
f (M H z )
The data is digitally modulated onto the carriers. The modulation method
used is DQPSK (Differential Quadrature Phase Shift Keying) with coherent
detection at the receiver.
The information is carried by the phase changes.
Security Systems
10
7
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Audio Encoding and Quality
All audio sent by the transmitter, is compressed by a sub-band APCM
(Adaptive Pulse Code Modulation) encoder.
System Audio Performance
Measured from the audio input of an LBB4503 to the headphone output of
an LBB4540
Audio frequency response:
Standard Quality mode………………...
: 20 Hz to 10 kHz (-3 dB)
Premium Quality…………….………….
: 20 Hz to 20 kHz (-3 dB)
Total harmonic distortion at 1kHz …
: < 0.05 %
Crosstalk attenuation at 4 kHz….….
: > 80 dB
Dynamic range………………………..
: > 80 dB
Weighted signal-to-noise ratio……..
: > 80 dB(A)
Security Systems
11
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
I&O Manual
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Transmission Protocol
Protocol and modulation technique :
according to IEC 61603 part 7
Carrier structure
Each carrier contains:
synchronization information
audio slots
data slot(s)
A Reed-Solomon RS coder is applied to protect the audio and data
information for transmission errors.
Security Systems
12
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Transmission Protocol
With four Standard Quality channels
Audio slot A
Audio slot B
SQ
Audio slot A
SYNC
RS frame 0
RS frame 1
RS frame 2
SQ
Audio slot B
SQ
RS frame 3
RS frame 4
1 super frame
Security Systems
13
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
data
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
RS parity
SQ
data
RS frame 5
RS parity
Transmission Protocol
With two Premium Quality channels
Audio slot A
PQ
Audio slot A
SYNC
RS frame 0
RS frame 1
RS frame 2
Audio slot B
PQ
RS frame 3
data
Audio slot B
RS frame 4
1 super frame
Security Systems
14
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
RS parity
data
RS frame 5
RS parity
System Technology
End of section
Security Systems
15
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Slide 3
System Technology
System Block Diagram
Infra-Red Radiation
Signal Processing
Audio Channel Quality Modes
Carriers and Channels
Audio Encoding and Quality
Transmission Protocol
Security Systems
1
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
I&O Manual
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Diagram Digital Infra-Red Transmission System
Transmission Protocol
DCN Next
Generation
DCN
system
Integrus
Transmitter
Up to 32
Interpreters
desks 6ch.
Audio
sources
Channels
Integrus
Radiator
Integrus
Receiver
Integrus
Radiator
Integrus
Receiver
Integrus
Radiator
Integrus
Receiver
Integrus
Radiator
Integrus
Receiver
Integrus
Charging equipment
Security Systems
2
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Infra Red Radiation
Based on transmission by modulated infra-red radiation.
Has a wavelength just above that of visible light.
Like visible light, it is reflected from hard surfaces, yet passes through
translucent materials such as glass.
Radiators are used to emission infra-red light with a wavelength of 870 nm.
Security Systems
3
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Infra- Red spectrum in relation to other spectra
%
100
75
1
50
25
4
5
2
0
400
500
600
700
3
800
1000 nm
1
Daylight spectrum 2 Sensitivity of the human eye 3 Intra- Red radiator
4
Sensitivity of the Infra- Red diode at the receiver
5
Sensitivity of the Infra- Red diode at the receiver with daylight filter
Security Systems
4
870 900
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Signal Processing
Audio
Channel 01
A/D Conversion
& Compression
4x
4x
Audio
Channel 04
Protocol Creation
& Modulation
A/D Conversion
& Compression
The Integrus system uses high frequency carrier signals (typically 2-8 MHz)
to prevent interference problems with modern light sources.
The transmission system converts analogue audio signals to digital
frequency modulated infra-red light.
The digital audio processing guarantees a constant high audio quality.
Receivers pick up the digital frequency modulated infra-red signal and
convert it back to an audio signal for a headphone.
Security Systems
5
Carrier
(to IR Radiator)
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Signal Processing main steps
1. A/D conversion - Each analogue audio channel is converted to a digital
signal.
2. Compression - To increase the amount of digital information.
3. Protocol Creation - Groups of four digital signals are combined into one
digital information stream. Fault algorithm information is added for fault
detection and correction.
4. Modulation - A high frequency carrier signal is phase-modulated with
the digital information stream.
5. Radiation – Up to 8 modulated carrier signals are combined and sent to
the infra-red radiators, which convert the carrier signals to modulated
infra-red light.
6. De-Modulation – a reversed process is used in the IR receivers to
convert the modulated infra-red light to separate analogue audio
channels.
Security Systems
6
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Audio Channel Quality modes
Up to four different audio channel quality modes:
1)
Mono, standard quality, maximum 32 channels of 10kHz
2)
Mono, premium quality, maximum 16 channels of 20kHz
3)
Stereo,standard quality, maximum 16 channels of 2x 10kHz
4)
Stereo,premium quality, maximum 8 channels of 2x 20kHz
The Standard quality mode uses less bandwidth and can be used for
transmitting speech.
For music the Premium quality mode is advisable.
Security Systems
7
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Carriers and Channels
Up to 8 different carrier signals (depending on the transmitter type) can
be transmit. Each carrier can contain up to 4 different audio channels.
The maximum number of channels per carrier is dependent on the
chosen quality modes.
Per carrier a mix of channels with different quality modes is possible, as
long as the total available bandwidth is not exceeded.
Security Systems
8
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Carriers and Channels
This table lists all possible channel combinations per carrier:
Channel Quality
10kHz
10kHz
10kHz
10kHz
10kHz
10kHz
10kHz
Mono SQ
20kHz
20kHz
10kHz (L)
10kHz
10kHz (R)
10kHz (L)
10kHz (R)
10kHz (L)
10kHz (R)
10kHz (L)
10kHz (R)
20kHz
20kHz
20kHz (L)
20kHz (R)
Carrier
Security Systems
9
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Mono PQ
Stereo SQ
Stereo PQ
Carriers and Channels
Carrier Allocation
-3 d B
2 .3 3 3
3
3 .6 6 7
4 .3 3 3
5
5 .6 6 7
6 .3 3 3
G u a rd b a n d
f (M H z )
The data is digitally modulated onto the carriers. The modulation method
used is DQPSK (Differential Quadrature Phase Shift Keying) with coherent
detection at the receiver.
The information is carried by the phase changes.
Security Systems
10
7
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Audio Encoding and Quality
All audio sent by the transmitter, is compressed by a sub-band APCM
(Adaptive Pulse Code Modulation) encoder.
System Audio Performance
Measured from the audio input of an LBB4503 to the headphone output of
an LBB4540
Audio frequency response:
Standard Quality mode………………...
: 20 Hz to 10 kHz (-3 dB)
Premium Quality…………….………….
: 20 Hz to 20 kHz (-3 dB)
Total harmonic distortion at 1kHz …
: < 0.05 %
Crosstalk attenuation at 4 kHz….….
: > 80 dB
Dynamic range………………………..
: > 80 dB
Weighted signal-to-noise ratio……..
: > 80 dB(A)
Security Systems
11
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
I&O Manual
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Transmission Protocol
Protocol and modulation technique :
according to IEC 61603 part 7
Carrier structure
Each carrier contains:
synchronization information
audio slots
data slot(s)
A Reed-Solomon RS coder is applied to protect the audio and data
information for transmission errors.
Security Systems
12
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Transmission Protocol
With four Standard Quality channels
Audio slot A
Audio slot B
SQ
Audio slot A
SYNC
RS frame 0
RS frame 1
RS frame 2
SQ
Audio slot B
SQ
RS frame 3
RS frame 4
1 super frame
Security Systems
13
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
data
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
RS parity
SQ
data
RS frame 5
RS parity
Transmission Protocol
With two Premium Quality channels
Audio slot A
PQ
Audio slot A
SYNC
RS frame 0
RS frame 1
RS frame 2
Audio slot B
PQ
RS frame 3
data
Audio slot B
RS frame 4
1 super frame
Security Systems
14
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
RS parity
data
RS frame 5
RS parity
System Technology
End of section
Security Systems
15
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Slide 4
System Technology
System Block Diagram
Infra-Red Radiation
Signal Processing
Audio Channel Quality Modes
Carriers and Channels
Audio Encoding and Quality
Transmission Protocol
Security Systems
1
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
I&O Manual
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Diagram Digital Infra-Red Transmission System
Transmission Protocol
DCN Next
Generation
DCN
system
Integrus
Transmitter
Up to 32
Interpreters
desks 6ch.
Audio
sources
Channels
Integrus
Radiator
Integrus
Receiver
Integrus
Radiator
Integrus
Receiver
Integrus
Radiator
Integrus
Receiver
Integrus
Radiator
Integrus
Receiver
Integrus
Charging equipment
Security Systems
2
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Infra Red Radiation
Based on transmission by modulated infra-red radiation.
Has a wavelength just above that of visible light.
Like visible light, it is reflected from hard surfaces, yet passes through
translucent materials such as glass.
Radiators are used to emission infra-red light with a wavelength of 870 nm.
Security Systems
3
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Infra- Red spectrum in relation to other spectra
%
100
75
1
50
25
4
5
2
0
400
500
600
700
3
800
1000 nm
1
Daylight spectrum 2 Sensitivity of the human eye 3 Intra- Red radiator
4
Sensitivity of the Infra- Red diode at the receiver
5
Sensitivity of the Infra- Red diode at the receiver with daylight filter
Security Systems
4
870 900
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Signal Processing
Audio
Channel 01
A/D Conversion
& Compression
4x
4x
Audio
Channel 04
Protocol Creation
& Modulation
A/D Conversion
& Compression
The Integrus system uses high frequency carrier signals (typically 2-8 MHz)
to prevent interference problems with modern light sources.
The transmission system converts analogue audio signals to digital
frequency modulated infra-red light.
The digital audio processing guarantees a constant high audio quality.
Receivers pick up the digital frequency modulated infra-red signal and
convert it back to an audio signal for a headphone.
Security Systems
5
Carrier
(to IR Radiator)
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Signal Processing main steps
1. A/D conversion - Each analogue audio channel is converted to a digital
signal.
2. Compression - To increase the amount of digital information.
3. Protocol Creation - Groups of four digital signals are combined into one
digital information stream. Fault algorithm information is added for fault
detection and correction.
4. Modulation - A high frequency carrier signal is phase-modulated with
the digital information stream.
5. Radiation – Up to 8 modulated carrier signals are combined and sent to
the infra-red radiators, which convert the carrier signals to modulated
infra-red light.
6. De-Modulation – a reversed process is used in the IR receivers to
convert the modulated infra-red light to separate analogue audio
channels.
Security Systems
6
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Audio Channel Quality modes
Up to four different audio channel quality modes:
1)
Mono, standard quality, maximum 32 channels of 10kHz
2)
Mono, premium quality, maximum 16 channels of 20kHz
3)
Stereo,standard quality, maximum 16 channels of 2x 10kHz
4)
Stereo,premium quality, maximum 8 channels of 2x 20kHz
The Standard quality mode uses less bandwidth and can be used for
transmitting speech.
For music the Premium quality mode is advisable.
Security Systems
7
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Carriers and Channels
Up to 8 different carrier signals (depending on the transmitter type) can
be transmit. Each carrier can contain up to 4 different audio channels.
The maximum number of channels per carrier is dependent on the
chosen quality modes.
Per carrier a mix of channels with different quality modes is possible, as
long as the total available bandwidth is not exceeded.
Security Systems
8
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Carriers and Channels
This table lists all possible channel combinations per carrier:
Channel Quality
10kHz
10kHz
10kHz
10kHz
10kHz
10kHz
10kHz
Mono SQ
20kHz
20kHz
10kHz (L)
10kHz
10kHz (R)
10kHz (L)
10kHz (R)
10kHz (L)
10kHz (R)
10kHz (L)
10kHz (R)
20kHz
20kHz
20kHz (L)
20kHz (R)
Carrier
Security Systems
9
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Mono PQ
Stereo SQ
Stereo PQ
Carriers and Channels
Carrier Allocation
-3 d B
2 .3 3 3
3
3 .6 6 7
4 .3 3 3
5
5 .6 6 7
6 .3 3 3
G u a rd b a n d
f (M H z )
The data is digitally modulated onto the carriers. The modulation method
used is DQPSK (Differential Quadrature Phase Shift Keying) with coherent
detection at the receiver.
The information is carried by the phase changes.
Security Systems
10
7
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Audio Encoding and Quality
All audio sent by the transmitter, is compressed by a sub-band APCM
(Adaptive Pulse Code Modulation) encoder.
System Audio Performance
Measured from the audio input of an LBB4503 to the headphone output of
an LBB4540
Audio frequency response:
Standard Quality mode………………...
: 20 Hz to 10 kHz (-3 dB)
Premium Quality…………….………….
: 20 Hz to 20 kHz (-3 dB)
Total harmonic distortion at 1kHz …
: < 0.05 %
Crosstalk attenuation at 4 kHz….….
: > 80 dB
Dynamic range………………………..
: > 80 dB
Weighted signal-to-noise ratio……..
: > 80 dB(A)
Security Systems
11
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
I&O Manual
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Transmission Protocol
Protocol and modulation technique :
according to IEC 61603 part 7
Carrier structure
Each carrier contains:
synchronization information
audio slots
data slot(s)
A Reed-Solomon RS coder is applied to protect the audio and data
information for transmission errors.
Security Systems
12
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Transmission Protocol
With four Standard Quality channels
Audio slot A
Audio slot B
SQ
Audio slot A
SYNC
RS frame 0
RS frame 1
RS frame 2
SQ
Audio slot B
SQ
RS frame 3
RS frame 4
1 super frame
Security Systems
13
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
data
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
RS parity
SQ
data
RS frame 5
RS parity
Transmission Protocol
With two Premium Quality channels
Audio slot A
PQ
Audio slot A
SYNC
RS frame 0
RS frame 1
RS frame 2
Audio slot B
PQ
RS frame 3
data
Audio slot B
RS frame 4
1 super frame
Security Systems
14
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
RS parity
data
RS frame 5
RS parity
System Technology
End of section
Security Systems
15
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Slide 5
System Technology
System Block Diagram
Infra-Red Radiation
Signal Processing
Audio Channel Quality Modes
Carriers and Channels
Audio Encoding and Quality
Transmission Protocol
Security Systems
1
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
I&O Manual
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Diagram Digital Infra-Red Transmission System
Transmission Protocol
DCN Next
Generation
DCN
system
Integrus
Transmitter
Up to 32
Interpreters
desks 6ch.
Audio
sources
Channels
Integrus
Radiator
Integrus
Receiver
Integrus
Radiator
Integrus
Receiver
Integrus
Radiator
Integrus
Receiver
Integrus
Radiator
Integrus
Receiver
Integrus
Charging equipment
Security Systems
2
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Infra Red Radiation
Based on transmission by modulated infra-red radiation.
Has a wavelength just above that of visible light.
Like visible light, it is reflected from hard surfaces, yet passes through
translucent materials such as glass.
Radiators are used to emission infra-red light with a wavelength of 870 nm.
Security Systems
3
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Infra- Red spectrum in relation to other spectra
%
100
75
1
50
25
4
5
2
0
400
500
600
700
3
800
1000 nm
1
Daylight spectrum 2 Sensitivity of the human eye 3 Intra- Red radiator
4
Sensitivity of the Infra- Red diode at the receiver
5
Sensitivity of the Infra- Red diode at the receiver with daylight filter
Security Systems
4
870 900
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Signal Processing
Audio
Channel 01
A/D Conversion
& Compression
4x
4x
Audio
Channel 04
Protocol Creation
& Modulation
A/D Conversion
& Compression
The Integrus system uses high frequency carrier signals (typically 2-8 MHz)
to prevent interference problems with modern light sources.
The transmission system converts analogue audio signals to digital
frequency modulated infra-red light.
The digital audio processing guarantees a constant high audio quality.
Receivers pick up the digital frequency modulated infra-red signal and
convert it back to an audio signal for a headphone.
Security Systems
5
Carrier
(to IR Radiator)
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Signal Processing main steps
1. A/D conversion - Each analogue audio channel is converted to a digital
signal.
2. Compression - To increase the amount of digital information.
3. Protocol Creation - Groups of four digital signals are combined into one
digital information stream. Fault algorithm information is added for fault
detection and correction.
4. Modulation - A high frequency carrier signal is phase-modulated with
the digital information stream.
5. Radiation – Up to 8 modulated carrier signals are combined and sent to
the infra-red radiators, which convert the carrier signals to modulated
infra-red light.
6. De-Modulation – a reversed process is used in the IR receivers to
convert the modulated infra-red light to separate analogue audio
channels.
Security Systems
6
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Audio Channel Quality modes
Up to four different audio channel quality modes:
1)
Mono, standard quality, maximum 32 channels of 10kHz
2)
Mono, premium quality, maximum 16 channels of 20kHz
3)
Stereo,standard quality, maximum 16 channels of 2x 10kHz
4)
Stereo,premium quality, maximum 8 channels of 2x 20kHz
The Standard quality mode uses less bandwidth and can be used for
transmitting speech.
For music the Premium quality mode is advisable.
Security Systems
7
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Carriers and Channels
Up to 8 different carrier signals (depending on the transmitter type) can
be transmit. Each carrier can contain up to 4 different audio channels.
The maximum number of channels per carrier is dependent on the
chosen quality modes.
Per carrier a mix of channels with different quality modes is possible, as
long as the total available bandwidth is not exceeded.
Security Systems
8
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Carriers and Channels
This table lists all possible channel combinations per carrier:
Channel Quality
10kHz
10kHz
10kHz
10kHz
10kHz
10kHz
10kHz
Mono SQ
20kHz
20kHz
10kHz (L)
10kHz
10kHz (R)
10kHz (L)
10kHz (R)
10kHz (L)
10kHz (R)
10kHz (L)
10kHz (R)
20kHz
20kHz
20kHz (L)
20kHz (R)
Carrier
Security Systems
9
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Mono PQ
Stereo SQ
Stereo PQ
Carriers and Channels
Carrier Allocation
-3 d B
2 .3 3 3
3
3 .6 6 7
4 .3 3 3
5
5 .6 6 7
6 .3 3 3
G u a rd b a n d
f (M H z )
The data is digitally modulated onto the carriers. The modulation method
used is DQPSK (Differential Quadrature Phase Shift Keying) with coherent
detection at the receiver.
The information is carried by the phase changes.
Security Systems
10
7
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Audio Encoding and Quality
All audio sent by the transmitter, is compressed by a sub-band APCM
(Adaptive Pulse Code Modulation) encoder.
System Audio Performance
Measured from the audio input of an LBB4503 to the headphone output of
an LBB4540
Audio frequency response:
Standard Quality mode………………...
: 20 Hz to 10 kHz (-3 dB)
Premium Quality…………….………….
: 20 Hz to 20 kHz (-3 dB)
Total harmonic distortion at 1kHz …
: < 0.05 %
Crosstalk attenuation at 4 kHz….….
: > 80 dB
Dynamic range………………………..
: > 80 dB
Weighted signal-to-noise ratio……..
: > 80 dB(A)
Security Systems
11
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
I&O Manual
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Transmission Protocol
Protocol and modulation technique :
according to IEC 61603 part 7
Carrier structure
Each carrier contains:
synchronization information
audio slots
data slot(s)
A Reed-Solomon RS coder is applied to protect the audio and data
information for transmission errors.
Security Systems
12
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Transmission Protocol
With four Standard Quality channels
Audio slot A
Audio slot B
SQ
Audio slot A
SYNC
RS frame 0
RS frame 1
RS frame 2
SQ
Audio slot B
SQ
RS frame 3
RS frame 4
1 super frame
Security Systems
13
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
data
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
RS parity
SQ
data
RS frame 5
RS parity
Transmission Protocol
With two Premium Quality channels
Audio slot A
PQ
Audio slot A
SYNC
RS frame 0
RS frame 1
RS frame 2
Audio slot B
PQ
RS frame 3
data
Audio slot B
RS frame 4
1 super frame
Security Systems
14
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
RS parity
data
RS frame 5
RS parity
System Technology
End of section
Security Systems
15
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Slide 6
System Technology
System Block Diagram
Infra-Red Radiation
Signal Processing
Audio Channel Quality Modes
Carriers and Channels
Audio Encoding and Quality
Transmission Protocol
Security Systems
1
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
I&O Manual
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Diagram Digital Infra-Red Transmission System
Transmission Protocol
DCN Next
Generation
DCN
system
Integrus
Transmitter
Up to 32
Interpreters
desks 6ch.
Audio
sources
Channels
Integrus
Radiator
Integrus
Receiver
Integrus
Radiator
Integrus
Receiver
Integrus
Radiator
Integrus
Receiver
Integrus
Radiator
Integrus
Receiver
Integrus
Charging equipment
Security Systems
2
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Infra Red Radiation
Based on transmission by modulated infra-red radiation.
Has a wavelength just above that of visible light.
Like visible light, it is reflected from hard surfaces, yet passes through
translucent materials such as glass.
Radiators are used to emission infra-red light with a wavelength of 870 nm.
Security Systems
3
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Infra- Red spectrum in relation to other spectra
%
100
75
1
50
25
4
5
2
0
400
500
600
700
3
800
1000 nm
1
Daylight spectrum 2 Sensitivity of the human eye 3 Intra- Red radiator
4
Sensitivity of the Infra- Red diode at the receiver
5
Sensitivity of the Infra- Red diode at the receiver with daylight filter
Security Systems
4
870 900
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Signal Processing
Audio
Channel 01
A/D Conversion
& Compression
4x
4x
Audio
Channel 04
Protocol Creation
& Modulation
A/D Conversion
& Compression
The Integrus system uses high frequency carrier signals (typically 2-8 MHz)
to prevent interference problems with modern light sources.
The transmission system converts analogue audio signals to digital
frequency modulated infra-red light.
The digital audio processing guarantees a constant high audio quality.
Receivers pick up the digital frequency modulated infra-red signal and
convert it back to an audio signal for a headphone.
Security Systems
5
Carrier
(to IR Radiator)
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Signal Processing main steps
1. A/D conversion - Each analogue audio channel is converted to a digital
signal.
2. Compression - To increase the amount of digital information.
3. Protocol Creation - Groups of four digital signals are combined into one
digital information stream. Fault algorithm information is added for fault
detection and correction.
4. Modulation - A high frequency carrier signal is phase-modulated with
the digital information stream.
5. Radiation – Up to 8 modulated carrier signals are combined and sent to
the infra-red radiators, which convert the carrier signals to modulated
infra-red light.
6. De-Modulation – a reversed process is used in the IR receivers to
convert the modulated infra-red light to separate analogue audio
channels.
Security Systems
6
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Audio Channel Quality modes
Up to four different audio channel quality modes:
1)
Mono, standard quality, maximum 32 channels of 10kHz
2)
Mono, premium quality, maximum 16 channels of 20kHz
3)
Stereo,standard quality, maximum 16 channels of 2x 10kHz
4)
Stereo,premium quality, maximum 8 channels of 2x 20kHz
The Standard quality mode uses less bandwidth and can be used for
transmitting speech.
For music the Premium quality mode is advisable.
Security Systems
7
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Carriers and Channels
Up to 8 different carrier signals (depending on the transmitter type) can
be transmit. Each carrier can contain up to 4 different audio channels.
The maximum number of channels per carrier is dependent on the
chosen quality modes.
Per carrier a mix of channels with different quality modes is possible, as
long as the total available bandwidth is not exceeded.
Security Systems
8
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Carriers and Channels
This table lists all possible channel combinations per carrier:
Channel Quality
10kHz
10kHz
10kHz
10kHz
10kHz
10kHz
10kHz
Mono SQ
20kHz
20kHz
10kHz (L)
10kHz
10kHz (R)
10kHz (L)
10kHz (R)
10kHz (L)
10kHz (R)
10kHz (L)
10kHz (R)
20kHz
20kHz
20kHz (L)
20kHz (R)
Carrier
Security Systems
9
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Mono PQ
Stereo SQ
Stereo PQ
Carriers and Channels
Carrier Allocation
-3 d B
2 .3 3 3
3
3 .6 6 7
4 .3 3 3
5
5 .6 6 7
6 .3 3 3
G u a rd b a n d
f (M H z )
The data is digitally modulated onto the carriers. The modulation method
used is DQPSK (Differential Quadrature Phase Shift Keying) with coherent
detection at the receiver.
The information is carried by the phase changes.
Security Systems
10
7
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Audio Encoding and Quality
All audio sent by the transmitter, is compressed by a sub-band APCM
(Adaptive Pulse Code Modulation) encoder.
System Audio Performance
Measured from the audio input of an LBB4503 to the headphone output of
an LBB4540
Audio frequency response:
Standard Quality mode………………...
: 20 Hz to 10 kHz (-3 dB)
Premium Quality…………….………….
: 20 Hz to 20 kHz (-3 dB)
Total harmonic distortion at 1kHz …
: < 0.05 %
Crosstalk attenuation at 4 kHz….….
: > 80 dB
Dynamic range………………………..
: > 80 dB
Weighted signal-to-noise ratio……..
: > 80 dB(A)
Security Systems
11
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
I&O Manual
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Transmission Protocol
Protocol and modulation technique :
according to IEC 61603 part 7
Carrier structure
Each carrier contains:
synchronization information
audio slots
data slot(s)
A Reed-Solomon RS coder is applied to protect the audio and data
information for transmission errors.
Security Systems
12
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Transmission Protocol
With four Standard Quality channels
Audio slot A
Audio slot B
SQ
Audio slot A
SYNC
RS frame 0
RS frame 1
RS frame 2
SQ
Audio slot B
SQ
RS frame 3
RS frame 4
1 super frame
Security Systems
13
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
data
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
RS parity
SQ
data
RS frame 5
RS parity
Transmission Protocol
With two Premium Quality channels
Audio slot A
PQ
Audio slot A
SYNC
RS frame 0
RS frame 1
RS frame 2
Audio slot B
PQ
RS frame 3
data
Audio slot B
RS frame 4
1 super frame
Security Systems
14
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
RS parity
data
RS frame 5
RS parity
System Technology
End of section
Security Systems
15
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Slide 7
System Technology
System Block Diagram
Infra-Red Radiation
Signal Processing
Audio Channel Quality Modes
Carriers and Channels
Audio Encoding and Quality
Transmission Protocol
Security Systems
1
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
I&O Manual
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Diagram Digital Infra-Red Transmission System
Transmission Protocol
DCN Next
Generation
DCN
system
Integrus
Transmitter
Up to 32
Interpreters
desks 6ch.
Audio
sources
Channels
Integrus
Radiator
Integrus
Receiver
Integrus
Radiator
Integrus
Receiver
Integrus
Radiator
Integrus
Receiver
Integrus
Radiator
Integrus
Receiver
Integrus
Charging equipment
Security Systems
2
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Infra Red Radiation
Based on transmission by modulated infra-red radiation.
Has a wavelength just above that of visible light.
Like visible light, it is reflected from hard surfaces, yet passes through
translucent materials such as glass.
Radiators are used to emission infra-red light with a wavelength of 870 nm.
Security Systems
3
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Infra- Red spectrum in relation to other spectra
%
100
75
1
50
25
4
5
2
0
400
500
600
700
3
800
1000 nm
1
Daylight spectrum 2 Sensitivity of the human eye 3 Intra- Red radiator
4
Sensitivity of the Infra- Red diode at the receiver
5
Sensitivity of the Infra- Red diode at the receiver with daylight filter
Security Systems
4
870 900
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Signal Processing
Audio
Channel 01
A/D Conversion
& Compression
4x
4x
Audio
Channel 04
Protocol Creation
& Modulation
A/D Conversion
& Compression
The Integrus system uses high frequency carrier signals (typically 2-8 MHz)
to prevent interference problems with modern light sources.
The transmission system converts analogue audio signals to digital
frequency modulated infra-red light.
The digital audio processing guarantees a constant high audio quality.
Receivers pick up the digital frequency modulated infra-red signal and
convert it back to an audio signal for a headphone.
Security Systems
5
Carrier
(to IR Radiator)
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Signal Processing main steps
1. A/D conversion - Each analogue audio channel is converted to a digital
signal.
2. Compression - To increase the amount of digital information.
3. Protocol Creation - Groups of four digital signals are combined into one
digital information stream. Fault algorithm information is added for fault
detection and correction.
4. Modulation - A high frequency carrier signal is phase-modulated with
the digital information stream.
5. Radiation – Up to 8 modulated carrier signals are combined and sent to
the infra-red radiators, which convert the carrier signals to modulated
infra-red light.
6. De-Modulation – a reversed process is used in the IR receivers to
convert the modulated infra-red light to separate analogue audio
channels.
Security Systems
6
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Audio Channel Quality modes
Up to four different audio channel quality modes:
1)
Mono, standard quality, maximum 32 channels of 10kHz
2)
Mono, premium quality, maximum 16 channels of 20kHz
3)
Stereo,standard quality, maximum 16 channels of 2x 10kHz
4)
Stereo,premium quality, maximum 8 channels of 2x 20kHz
The Standard quality mode uses less bandwidth and can be used for
transmitting speech.
For music the Premium quality mode is advisable.
Security Systems
7
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Carriers and Channels
Up to 8 different carrier signals (depending on the transmitter type) can
be transmit. Each carrier can contain up to 4 different audio channels.
The maximum number of channels per carrier is dependent on the
chosen quality modes.
Per carrier a mix of channels with different quality modes is possible, as
long as the total available bandwidth is not exceeded.
Security Systems
8
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Carriers and Channels
This table lists all possible channel combinations per carrier:
Channel Quality
10kHz
10kHz
10kHz
10kHz
10kHz
10kHz
10kHz
Mono SQ
20kHz
20kHz
10kHz (L)
10kHz
10kHz (R)
10kHz (L)
10kHz (R)
10kHz (L)
10kHz (R)
10kHz (L)
10kHz (R)
20kHz
20kHz
20kHz (L)
20kHz (R)
Carrier
Security Systems
9
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Mono PQ
Stereo SQ
Stereo PQ
Carriers and Channels
Carrier Allocation
-3 d B
2 .3 3 3
3
3 .6 6 7
4 .3 3 3
5
5 .6 6 7
6 .3 3 3
G u a rd b a n d
f (M H z )
The data is digitally modulated onto the carriers. The modulation method
used is DQPSK (Differential Quadrature Phase Shift Keying) with coherent
detection at the receiver.
The information is carried by the phase changes.
Security Systems
10
7
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Audio Encoding and Quality
All audio sent by the transmitter, is compressed by a sub-band APCM
(Adaptive Pulse Code Modulation) encoder.
System Audio Performance
Measured from the audio input of an LBB4503 to the headphone output of
an LBB4540
Audio frequency response:
Standard Quality mode………………...
: 20 Hz to 10 kHz (-3 dB)
Premium Quality…………….………….
: 20 Hz to 20 kHz (-3 dB)
Total harmonic distortion at 1kHz …
: < 0.05 %
Crosstalk attenuation at 4 kHz….….
: > 80 dB
Dynamic range………………………..
: > 80 dB
Weighted signal-to-noise ratio……..
: > 80 dB(A)
Security Systems
11
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
I&O Manual
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Transmission Protocol
Protocol and modulation technique :
according to IEC 61603 part 7
Carrier structure
Each carrier contains:
synchronization information
audio slots
data slot(s)
A Reed-Solomon RS coder is applied to protect the audio and data
information for transmission errors.
Security Systems
12
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Transmission Protocol
With four Standard Quality channels
Audio slot A
Audio slot B
SQ
Audio slot A
SYNC
RS frame 0
RS frame 1
RS frame 2
SQ
Audio slot B
SQ
RS frame 3
RS frame 4
1 super frame
Security Systems
13
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
data
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
RS parity
SQ
data
RS frame 5
RS parity
Transmission Protocol
With two Premium Quality channels
Audio slot A
PQ
Audio slot A
SYNC
RS frame 0
RS frame 1
RS frame 2
Audio slot B
PQ
RS frame 3
data
Audio slot B
RS frame 4
1 super frame
Security Systems
14
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
RS parity
data
RS frame 5
RS parity
System Technology
End of section
Security Systems
15
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Slide 8
System Technology
System Block Diagram
Infra-Red Radiation
Signal Processing
Audio Channel Quality Modes
Carriers and Channels
Audio Encoding and Quality
Transmission Protocol
Security Systems
1
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
I&O Manual
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Diagram Digital Infra-Red Transmission System
Transmission Protocol
DCN Next
Generation
DCN
system
Integrus
Transmitter
Up to 32
Interpreters
desks 6ch.
Audio
sources
Channels
Integrus
Radiator
Integrus
Receiver
Integrus
Radiator
Integrus
Receiver
Integrus
Radiator
Integrus
Receiver
Integrus
Radiator
Integrus
Receiver
Integrus
Charging equipment
Security Systems
2
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Infra Red Radiation
Based on transmission by modulated infra-red radiation.
Has a wavelength just above that of visible light.
Like visible light, it is reflected from hard surfaces, yet passes through
translucent materials such as glass.
Radiators are used to emission infra-red light with a wavelength of 870 nm.
Security Systems
3
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Infra- Red spectrum in relation to other spectra
%
100
75
1
50
25
4
5
2
0
400
500
600
700
3
800
1000 nm
1
Daylight spectrum 2 Sensitivity of the human eye 3 Intra- Red radiator
4
Sensitivity of the Infra- Red diode at the receiver
5
Sensitivity of the Infra- Red diode at the receiver with daylight filter
Security Systems
4
870 900
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Signal Processing
Audio
Channel 01
A/D Conversion
& Compression
4x
4x
Audio
Channel 04
Protocol Creation
& Modulation
A/D Conversion
& Compression
The Integrus system uses high frequency carrier signals (typically 2-8 MHz)
to prevent interference problems with modern light sources.
The transmission system converts analogue audio signals to digital
frequency modulated infra-red light.
The digital audio processing guarantees a constant high audio quality.
Receivers pick up the digital frequency modulated infra-red signal and
convert it back to an audio signal for a headphone.
Security Systems
5
Carrier
(to IR Radiator)
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Signal Processing main steps
1. A/D conversion - Each analogue audio channel is converted to a digital
signal.
2. Compression - To increase the amount of digital information.
3. Protocol Creation - Groups of four digital signals are combined into one
digital information stream. Fault algorithm information is added for fault
detection and correction.
4. Modulation - A high frequency carrier signal is phase-modulated with
the digital information stream.
5. Radiation – Up to 8 modulated carrier signals are combined and sent to
the infra-red radiators, which convert the carrier signals to modulated
infra-red light.
6. De-Modulation – a reversed process is used in the IR receivers to
convert the modulated infra-red light to separate analogue audio
channels.
Security Systems
6
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Audio Channel Quality modes
Up to four different audio channel quality modes:
1)
Mono, standard quality, maximum 32 channels of 10kHz
2)
Mono, premium quality, maximum 16 channels of 20kHz
3)
Stereo,standard quality, maximum 16 channels of 2x 10kHz
4)
Stereo,premium quality, maximum 8 channels of 2x 20kHz
The Standard quality mode uses less bandwidth and can be used for
transmitting speech.
For music the Premium quality mode is advisable.
Security Systems
7
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Carriers and Channels
Up to 8 different carrier signals (depending on the transmitter type) can
be transmit. Each carrier can contain up to 4 different audio channels.
The maximum number of channels per carrier is dependent on the
chosen quality modes.
Per carrier a mix of channels with different quality modes is possible, as
long as the total available bandwidth is not exceeded.
Security Systems
8
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Carriers and Channels
This table lists all possible channel combinations per carrier:
Channel Quality
10kHz
10kHz
10kHz
10kHz
10kHz
10kHz
10kHz
Mono SQ
20kHz
20kHz
10kHz (L)
10kHz
10kHz (R)
10kHz (L)
10kHz (R)
10kHz (L)
10kHz (R)
10kHz (L)
10kHz (R)
20kHz
20kHz
20kHz (L)
20kHz (R)
Carrier
Security Systems
9
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Mono PQ
Stereo SQ
Stereo PQ
Carriers and Channels
Carrier Allocation
-3 d B
2 .3 3 3
3
3 .6 6 7
4 .3 3 3
5
5 .6 6 7
6 .3 3 3
G u a rd b a n d
f (M H z )
The data is digitally modulated onto the carriers. The modulation method
used is DQPSK (Differential Quadrature Phase Shift Keying) with coherent
detection at the receiver.
The information is carried by the phase changes.
Security Systems
10
7
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Audio Encoding and Quality
All audio sent by the transmitter, is compressed by a sub-band APCM
(Adaptive Pulse Code Modulation) encoder.
System Audio Performance
Measured from the audio input of an LBB4503 to the headphone output of
an LBB4540
Audio frequency response:
Standard Quality mode………………...
: 20 Hz to 10 kHz (-3 dB)
Premium Quality…………….………….
: 20 Hz to 20 kHz (-3 dB)
Total harmonic distortion at 1kHz …
: < 0.05 %
Crosstalk attenuation at 4 kHz….….
: > 80 dB
Dynamic range………………………..
: > 80 dB
Weighted signal-to-noise ratio……..
: > 80 dB(A)
Security Systems
11
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
I&O Manual
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Transmission Protocol
Protocol and modulation technique :
according to IEC 61603 part 7
Carrier structure
Each carrier contains:
synchronization information
audio slots
data slot(s)
A Reed-Solomon RS coder is applied to protect the audio and data
information for transmission errors.
Security Systems
12
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Transmission Protocol
With four Standard Quality channels
Audio slot A
Audio slot B
SQ
Audio slot A
SYNC
RS frame 0
RS frame 1
RS frame 2
SQ
Audio slot B
SQ
RS frame 3
RS frame 4
1 super frame
Security Systems
13
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
data
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
RS parity
SQ
data
RS frame 5
RS parity
Transmission Protocol
With two Premium Quality channels
Audio slot A
PQ
Audio slot A
SYNC
RS frame 0
RS frame 1
RS frame 2
Audio slot B
PQ
RS frame 3
data
Audio slot B
RS frame 4
1 super frame
Security Systems
14
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
RS parity
data
RS frame 5
RS parity
System Technology
End of section
Security Systems
15
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Slide 9
System Technology
System Block Diagram
Infra-Red Radiation
Signal Processing
Audio Channel Quality Modes
Carriers and Channels
Audio Encoding and Quality
Transmission Protocol
Security Systems
1
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
I&O Manual
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Diagram Digital Infra-Red Transmission System
Transmission Protocol
DCN Next
Generation
DCN
system
Integrus
Transmitter
Up to 32
Interpreters
desks 6ch.
Audio
sources
Channels
Integrus
Radiator
Integrus
Receiver
Integrus
Radiator
Integrus
Receiver
Integrus
Radiator
Integrus
Receiver
Integrus
Radiator
Integrus
Receiver
Integrus
Charging equipment
Security Systems
2
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Infra Red Radiation
Based on transmission by modulated infra-red radiation.
Has a wavelength just above that of visible light.
Like visible light, it is reflected from hard surfaces, yet passes through
translucent materials such as glass.
Radiators are used to emission infra-red light with a wavelength of 870 nm.
Security Systems
3
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Infra- Red spectrum in relation to other spectra
%
100
75
1
50
25
4
5
2
0
400
500
600
700
3
800
1000 nm
1
Daylight spectrum 2 Sensitivity of the human eye 3 Intra- Red radiator
4
Sensitivity of the Infra- Red diode at the receiver
5
Sensitivity of the Infra- Red diode at the receiver with daylight filter
Security Systems
4
870 900
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Signal Processing
Audio
Channel 01
A/D Conversion
& Compression
4x
4x
Audio
Channel 04
Protocol Creation
& Modulation
A/D Conversion
& Compression
The Integrus system uses high frequency carrier signals (typically 2-8 MHz)
to prevent interference problems with modern light sources.
The transmission system converts analogue audio signals to digital
frequency modulated infra-red light.
The digital audio processing guarantees a constant high audio quality.
Receivers pick up the digital frequency modulated infra-red signal and
convert it back to an audio signal for a headphone.
Security Systems
5
Carrier
(to IR Radiator)
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Signal Processing main steps
1. A/D conversion - Each analogue audio channel is converted to a digital
signal.
2. Compression - To increase the amount of digital information.
3. Protocol Creation - Groups of four digital signals are combined into one
digital information stream. Fault algorithm information is added for fault
detection and correction.
4. Modulation - A high frequency carrier signal is phase-modulated with
the digital information stream.
5. Radiation – Up to 8 modulated carrier signals are combined and sent to
the infra-red radiators, which convert the carrier signals to modulated
infra-red light.
6. De-Modulation – a reversed process is used in the IR receivers to
convert the modulated infra-red light to separate analogue audio
channels.
Security Systems
6
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Audio Channel Quality modes
Up to four different audio channel quality modes:
1)
Mono, standard quality, maximum 32 channels of 10kHz
2)
Mono, premium quality, maximum 16 channels of 20kHz
3)
Stereo,standard quality, maximum 16 channels of 2x 10kHz
4)
Stereo,premium quality, maximum 8 channels of 2x 20kHz
The Standard quality mode uses less bandwidth and can be used for
transmitting speech.
For music the Premium quality mode is advisable.
Security Systems
7
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Carriers and Channels
Up to 8 different carrier signals (depending on the transmitter type) can
be transmit. Each carrier can contain up to 4 different audio channels.
The maximum number of channels per carrier is dependent on the
chosen quality modes.
Per carrier a mix of channels with different quality modes is possible, as
long as the total available bandwidth is not exceeded.
Security Systems
8
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Carriers and Channels
This table lists all possible channel combinations per carrier:
Channel Quality
10kHz
10kHz
10kHz
10kHz
10kHz
10kHz
10kHz
Mono SQ
20kHz
20kHz
10kHz (L)
10kHz
10kHz (R)
10kHz (L)
10kHz (R)
10kHz (L)
10kHz (R)
10kHz (L)
10kHz (R)
20kHz
20kHz
20kHz (L)
20kHz (R)
Carrier
Security Systems
9
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Mono PQ
Stereo SQ
Stereo PQ
Carriers and Channels
Carrier Allocation
-3 d B
2 .3 3 3
3
3 .6 6 7
4 .3 3 3
5
5 .6 6 7
6 .3 3 3
G u a rd b a n d
f (M H z )
The data is digitally modulated onto the carriers. The modulation method
used is DQPSK (Differential Quadrature Phase Shift Keying) with coherent
detection at the receiver.
The information is carried by the phase changes.
Security Systems
10
7
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Audio Encoding and Quality
All audio sent by the transmitter, is compressed by a sub-band APCM
(Adaptive Pulse Code Modulation) encoder.
System Audio Performance
Measured from the audio input of an LBB4503 to the headphone output of
an LBB4540
Audio frequency response:
Standard Quality mode………………...
: 20 Hz to 10 kHz (-3 dB)
Premium Quality…………….………….
: 20 Hz to 20 kHz (-3 dB)
Total harmonic distortion at 1kHz …
: < 0.05 %
Crosstalk attenuation at 4 kHz….….
: > 80 dB
Dynamic range………………………..
: > 80 dB
Weighted signal-to-noise ratio……..
: > 80 dB(A)
Security Systems
11
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
I&O Manual
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Transmission Protocol
Protocol and modulation technique :
according to IEC 61603 part 7
Carrier structure
Each carrier contains:
synchronization information
audio slots
data slot(s)
A Reed-Solomon RS coder is applied to protect the audio and data
information for transmission errors.
Security Systems
12
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Transmission Protocol
With four Standard Quality channels
Audio slot A
Audio slot B
SQ
Audio slot A
SYNC
RS frame 0
RS frame 1
RS frame 2
SQ
Audio slot B
SQ
RS frame 3
RS frame 4
1 super frame
Security Systems
13
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
data
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
RS parity
SQ
data
RS frame 5
RS parity
Transmission Protocol
With two Premium Quality channels
Audio slot A
PQ
Audio slot A
SYNC
RS frame 0
RS frame 1
RS frame 2
Audio slot B
PQ
RS frame 3
data
Audio slot B
RS frame 4
1 super frame
Security Systems
14
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
RS parity
data
RS frame 5
RS parity
System Technology
End of section
Security Systems
15
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Slide 10
System Technology
System Block Diagram
Infra-Red Radiation
Signal Processing
Audio Channel Quality Modes
Carriers and Channels
Audio Encoding and Quality
Transmission Protocol
Security Systems
1
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
I&O Manual
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Diagram Digital Infra-Red Transmission System
Transmission Protocol
DCN Next
Generation
DCN
system
Integrus
Transmitter
Up to 32
Interpreters
desks 6ch.
Audio
sources
Channels
Integrus
Radiator
Integrus
Receiver
Integrus
Radiator
Integrus
Receiver
Integrus
Radiator
Integrus
Receiver
Integrus
Radiator
Integrus
Receiver
Integrus
Charging equipment
Security Systems
2
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Infra Red Radiation
Based on transmission by modulated infra-red radiation.
Has a wavelength just above that of visible light.
Like visible light, it is reflected from hard surfaces, yet passes through
translucent materials such as glass.
Radiators are used to emission infra-red light with a wavelength of 870 nm.
Security Systems
3
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Infra- Red spectrum in relation to other spectra
%
100
75
1
50
25
4
5
2
0
400
500
600
700
3
800
1000 nm
1
Daylight spectrum 2 Sensitivity of the human eye 3 Intra- Red radiator
4
Sensitivity of the Infra- Red diode at the receiver
5
Sensitivity of the Infra- Red diode at the receiver with daylight filter
Security Systems
4
870 900
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Signal Processing
Audio
Channel 01
A/D Conversion
& Compression
4x
4x
Audio
Channel 04
Protocol Creation
& Modulation
A/D Conversion
& Compression
The Integrus system uses high frequency carrier signals (typically 2-8 MHz)
to prevent interference problems with modern light sources.
The transmission system converts analogue audio signals to digital
frequency modulated infra-red light.
The digital audio processing guarantees a constant high audio quality.
Receivers pick up the digital frequency modulated infra-red signal and
convert it back to an audio signal for a headphone.
Security Systems
5
Carrier
(to IR Radiator)
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Signal Processing main steps
1. A/D conversion - Each analogue audio channel is converted to a digital
signal.
2. Compression - To increase the amount of digital information.
3. Protocol Creation - Groups of four digital signals are combined into one
digital information stream. Fault algorithm information is added for fault
detection and correction.
4. Modulation - A high frequency carrier signal is phase-modulated with
the digital information stream.
5. Radiation – Up to 8 modulated carrier signals are combined and sent to
the infra-red radiators, which convert the carrier signals to modulated
infra-red light.
6. De-Modulation – a reversed process is used in the IR receivers to
convert the modulated infra-red light to separate analogue audio
channels.
Security Systems
6
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Audio Channel Quality modes
Up to four different audio channel quality modes:
1)
Mono, standard quality, maximum 32 channels of 10kHz
2)
Mono, premium quality, maximum 16 channels of 20kHz
3)
Stereo,standard quality, maximum 16 channels of 2x 10kHz
4)
Stereo,premium quality, maximum 8 channels of 2x 20kHz
The Standard quality mode uses less bandwidth and can be used for
transmitting speech.
For music the Premium quality mode is advisable.
Security Systems
7
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Carriers and Channels
Up to 8 different carrier signals (depending on the transmitter type) can
be transmit. Each carrier can contain up to 4 different audio channels.
The maximum number of channels per carrier is dependent on the
chosen quality modes.
Per carrier a mix of channels with different quality modes is possible, as
long as the total available bandwidth is not exceeded.
Security Systems
8
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Carriers and Channels
This table lists all possible channel combinations per carrier:
Channel Quality
10kHz
10kHz
10kHz
10kHz
10kHz
10kHz
10kHz
Mono SQ
20kHz
20kHz
10kHz (L)
10kHz
10kHz (R)
10kHz (L)
10kHz (R)
10kHz (L)
10kHz (R)
10kHz (L)
10kHz (R)
20kHz
20kHz
20kHz (L)
20kHz (R)
Carrier
Security Systems
9
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Mono PQ
Stereo SQ
Stereo PQ
Carriers and Channels
Carrier Allocation
-3 d B
2 .3 3 3
3
3 .6 6 7
4 .3 3 3
5
5 .6 6 7
6 .3 3 3
G u a rd b a n d
f (M H z )
The data is digitally modulated onto the carriers. The modulation method
used is DQPSK (Differential Quadrature Phase Shift Keying) with coherent
detection at the receiver.
The information is carried by the phase changes.
Security Systems
10
7
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Audio Encoding and Quality
All audio sent by the transmitter, is compressed by a sub-band APCM
(Adaptive Pulse Code Modulation) encoder.
System Audio Performance
Measured from the audio input of an LBB4503 to the headphone output of
an LBB4540
Audio frequency response:
Standard Quality mode………………...
: 20 Hz to 10 kHz (-3 dB)
Premium Quality…………….………….
: 20 Hz to 20 kHz (-3 dB)
Total harmonic distortion at 1kHz …
: < 0.05 %
Crosstalk attenuation at 4 kHz….….
: > 80 dB
Dynamic range………………………..
: > 80 dB
Weighted signal-to-noise ratio……..
: > 80 dB(A)
Security Systems
11
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
I&O Manual
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Transmission Protocol
Protocol and modulation technique :
according to IEC 61603 part 7
Carrier structure
Each carrier contains:
synchronization information
audio slots
data slot(s)
A Reed-Solomon RS coder is applied to protect the audio and data
information for transmission errors.
Security Systems
12
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Transmission Protocol
With four Standard Quality channels
Audio slot A
Audio slot B
SQ
Audio slot A
SYNC
RS frame 0
RS frame 1
RS frame 2
SQ
Audio slot B
SQ
RS frame 3
RS frame 4
1 super frame
Security Systems
13
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
data
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
RS parity
SQ
data
RS frame 5
RS parity
Transmission Protocol
With two Premium Quality channels
Audio slot A
PQ
Audio slot A
SYNC
RS frame 0
RS frame 1
RS frame 2
Audio slot B
PQ
RS frame 3
data
Audio slot B
RS frame 4
1 super frame
Security Systems
14
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
RS parity
data
RS frame 5
RS parity
System Technology
End of section
Security Systems
15
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Slide 11
System Technology
System Block Diagram
Infra-Red Radiation
Signal Processing
Audio Channel Quality Modes
Carriers and Channels
Audio Encoding and Quality
Transmission Protocol
Security Systems
1
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
I&O Manual
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Diagram Digital Infra-Red Transmission System
Transmission Protocol
DCN Next
Generation
DCN
system
Integrus
Transmitter
Up to 32
Interpreters
desks 6ch.
Audio
sources
Channels
Integrus
Radiator
Integrus
Receiver
Integrus
Radiator
Integrus
Receiver
Integrus
Radiator
Integrus
Receiver
Integrus
Radiator
Integrus
Receiver
Integrus
Charging equipment
Security Systems
2
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Infra Red Radiation
Based on transmission by modulated infra-red radiation.
Has a wavelength just above that of visible light.
Like visible light, it is reflected from hard surfaces, yet passes through
translucent materials such as glass.
Radiators are used to emission infra-red light with a wavelength of 870 nm.
Security Systems
3
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Infra- Red spectrum in relation to other spectra
%
100
75
1
50
25
4
5
2
0
400
500
600
700
3
800
1000 nm
1
Daylight spectrum 2 Sensitivity of the human eye 3 Intra- Red radiator
4
Sensitivity of the Infra- Red diode at the receiver
5
Sensitivity of the Infra- Red diode at the receiver with daylight filter
Security Systems
4
870 900
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Signal Processing
Audio
Channel 01
A/D Conversion
& Compression
4x
4x
Audio
Channel 04
Protocol Creation
& Modulation
A/D Conversion
& Compression
The Integrus system uses high frequency carrier signals (typically 2-8 MHz)
to prevent interference problems with modern light sources.
The transmission system converts analogue audio signals to digital
frequency modulated infra-red light.
The digital audio processing guarantees a constant high audio quality.
Receivers pick up the digital frequency modulated infra-red signal and
convert it back to an audio signal for a headphone.
Security Systems
5
Carrier
(to IR Radiator)
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Signal Processing main steps
1. A/D conversion - Each analogue audio channel is converted to a digital
signal.
2. Compression - To increase the amount of digital information.
3. Protocol Creation - Groups of four digital signals are combined into one
digital information stream. Fault algorithm information is added for fault
detection and correction.
4. Modulation - A high frequency carrier signal is phase-modulated with
the digital information stream.
5. Radiation – Up to 8 modulated carrier signals are combined and sent to
the infra-red radiators, which convert the carrier signals to modulated
infra-red light.
6. De-Modulation – a reversed process is used in the IR receivers to
convert the modulated infra-red light to separate analogue audio
channels.
Security Systems
6
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Audio Channel Quality modes
Up to four different audio channel quality modes:
1)
Mono, standard quality, maximum 32 channels of 10kHz
2)
Mono, premium quality, maximum 16 channels of 20kHz
3)
Stereo,standard quality, maximum 16 channels of 2x 10kHz
4)
Stereo,premium quality, maximum 8 channels of 2x 20kHz
The Standard quality mode uses less bandwidth and can be used for
transmitting speech.
For music the Premium quality mode is advisable.
Security Systems
7
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Carriers and Channels
Up to 8 different carrier signals (depending on the transmitter type) can
be transmit. Each carrier can contain up to 4 different audio channels.
The maximum number of channels per carrier is dependent on the
chosen quality modes.
Per carrier a mix of channels with different quality modes is possible, as
long as the total available bandwidth is not exceeded.
Security Systems
8
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Carriers and Channels
This table lists all possible channel combinations per carrier:
Channel Quality
10kHz
10kHz
10kHz
10kHz
10kHz
10kHz
10kHz
Mono SQ
20kHz
20kHz
10kHz (L)
10kHz
10kHz (R)
10kHz (L)
10kHz (R)
10kHz (L)
10kHz (R)
10kHz (L)
10kHz (R)
20kHz
20kHz
20kHz (L)
20kHz (R)
Carrier
Security Systems
9
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Mono PQ
Stereo SQ
Stereo PQ
Carriers and Channels
Carrier Allocation
-3 d B
2 .3 3 3
3
3 .6 6 7
4 .3 3 3
5
5 .6 6 7
6 .3 3 3
G u a rd b a n d
f (M H z )
The data is digitally modulated onto the carriers. The modulation method
used is DQPSK (Differential Quadrature Phase Shift Keying) with coherent
detection at the receiver.
The information is carried by the phase changes.
Security Systems
10
7
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Audio Encoding and Quality
All audio sent by the transmitter, is compressed by a sub-band APCM
(Adaptive Pulse Code Modulation) encoder.
System Audio Performance
Measured from the audio input of an LBB4503 to the headphone output of
an LBB4540
Audio frequency response:
Standard Quality mode………………...
: 20 Hz to 10 kHz (-3 dB)
Premium Quality…………….………….
: 20 Hz to 20 kHz (-3 dB)
Total harmonic distortion at 1kHz …
: < 0.05 %
Crosstalk attenuation at 4 kHz….….
: > 80 dB
Dynamic range………………………..
: > 80 dB
Weighted signal-to-noise ratio……..
: > 80 dB(A)
Security Systems
11
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
I&O Manual
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Transmission Protocol
Protocol and modulation technique :
according to IEC 61603 part 7
Carrier structure
Each carrier contains:
synchronization information
audio slots
data slot(s)
A Reed-Solomon RS coder is applied to protect the audio and data
information for transmission errors.
Security Systems
12
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Transmission Protocol
With four Standard Quality channels
Audio slot A
Audio slot B
SQ
Audio slot A
SYNC
RS frame 0
RS frame 1
RS frame 2
SQ
Audio slot B
SQ
RS frame 3
RS frame 4
1 super frame
Security Systems
13
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
data
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
RS parity
SQ
data
RS frame 5
RS parity
Transmission Protocol
With two Premium Quality channels
Audio slot A
PQ
Audio slot A
SYNC
RS frame 0
RS frame 1
RS frame 2
Audio slot B
PQ
RS frame 3
data
Audio slot B
RS frame 4
1 super frame
Security Systems
14
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
RS parity
data
RS frame 5
RS parity
System Technology
End of section
Security Systems
15
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Slide 12
System Technology
System Block Diagram
Infra-Red Radiation
Signal Processing
Audio Channel Quality Modes
Carriers and Channels
Audio Encoding and Quality
Transmission Protocol
Security Systems
1
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
I&O Manual
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Diagram Digital Infra-Red Transmission System
Transmission Protocol
DCN Next
Generation
DCN
system
Integrus
Transmitter
Up to 32
Interpreters
desks 6ch.
Audio
sources
Channels
Integrus
Radiator
Integrus
Receiver
Integrus
Radiator
Integrus
Receiver
Integrus
Radiator
Integrus
Receiver
Integrus
Radiator
Integrus
Receiver
Integrus
Charging equipment
Security Systems
2
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Infra Red Radiation
Based on transmission by modulated infra-red radiation.
Has a wavelength just above that of visible light.
Like visible light, it is reflected from hard surfaces, yet passes through
translucent materials such as glass.
Radiators are used to emission infra-red light with a wavelength of 870 nm.
Security Systems
3
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Infra- Red spectrum in relation to other spectra
%
100
75
1
50
25
4
5
2
0
400
500
600
700
3
800
1000 nm
1
Daylight spectrum 2 Sensitivity of the human eye 3 Intra- Red radiator
4
Sensitivity of the Infra- Red diode at the receiver
5
Sensitivity of the Infra- Red diode at the receiver with daylight filter
Security Systems
4
870 900
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Signal Processing
Audio
Channel 01
A/D Conversion
& Compression
4x
4x
Audio
Channel 04
Protocol Creation
& Modulation
A/D Conversion
& Compression
The Integrus system uses high frequency carrier signals (typically 2-8 MHz)
to prevent interference problems with modern light sources.
The transmission system converts analogue audio signals to digital
frequency modulated infra-red light.
The digital audio processing guarantees a constant high audio quality.
Receivers pick up the digital frequency modulated infra-red signal and
convert it back to an audio signal for a headphone.
Security Systems
5
Carrier
(to IR Radiator)
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Signal Processing main steps
1. A/D conversion - Each analogue audio channel is converted to a digital
signal.
2. Compression - To increase the amount of digital information.
3. Protocol Creation - Groups of four digital signals are combined into one
digital information stream. Fault algorithm information is added for fault
detection and correction.
4. Modulation - A high frequency carrier signal is phase-modulated with
the digital information stream.
5. Radiation – Up to 8 modulated carrier signals are combined and sent to
the infra-red radiators, which convert the carrier signals to modulated
infra-red light.
6. De-Modulation – a reversed process is used in the IR receivers to
convert the modulated infra-red light to separate analogue audio
channels.
Security Systems
6
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Audio Channel Quality modes
Up to four different audio channel quality modes:
1)
Mono, standard quality, maximum 32 channels of 10kHz
2)
Mono, premium quality, maximum 16 channels of 20kHz
3)
Stereo,standard quality, maximum 16 channels of 2x 10kHz
4)
Stereo,premium quality, maximum 8 channels of 2x 20kHz
The Standard quality mode uses less bandwidth and can be used for
transmitting speech.
For music the Premium quality mode is advisable.
Security Systems
7
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Carriers and Channels
Up to 8 different carrier signals (depending on the transmitter type) can
be transmit. Each carrier can contain up to 4 different audio channels.
The maximum number of channels per carrier is dependent on the
chosen quality modes.
Per carrier a mix of channels with different quality modes is possible, as
long as the total available bandwidth is not exceeded.
Security Systems
8
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Carriers and Channels
This table lists all possible channel combinations per carrier:
Channel Quality
10kHz
10kHz
10kHz
10kHz
10kHz
10kHz
10kHz
Mono SQ
20kHz
20kHz
10kHz (L)
10kHz
10kHz (R)
10kHz (L)
10kHz (R)
10kHz (L)
10kHz (R)
10kHz (L)
10kHz (R)
20kHz
20kHz
20kHz (L)
20kHz (R)
Carrier
Security Systems
9
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Mono PQ
Stereo SQ
Stereo PQ
Carriers and Channels
Carrier Allocation
-3 d B
2 .3 3 3
3
3 .6 6 7
4 .3 3 3
5
5 .6 6 7
6 .3 3 3
G u a rd b a n d
f (M H z )
The data is digitally modulated onto the carriers. The modulation method
used is DQPSK (Differential Quadrature Phase Shift Keying) with coherent
detection at the receiver.
The information is carried by the phase changes.
Security Systems
10
7
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Audio Encoding and Quality
All audio sent by the transmitter, is compressed by a sub-band APCM
(Adaptive Pulse Code Modulation) encoder.
System Audio Performance
Measured from the audio input of an LBB4503 to the headphone output of
an LBB4540
Audio frequency response:
Standard Quality mode………………...
: 20 Hz to 10 kHz (-3 dB)
Premium Quality…………….………….
: 20 Hz to 20 kHz (-3 dB)
Total harmonic distortion at 1kHz …
: < 0.05 %
Crosstalk attenuation at 4 kHz….….
: > 80 dB
Dynamic range………………………..
: > 80 dB
Weighted signal-to-noise ratio……..
: > 80 dB(A)
Security Systems
11
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
I&O Manual
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Transmission Protocol
Protocol and modulation technique :
according to IEC 61603 part 7
Carrier structure
Each carrier contains:
synchronization information
audio slots
data slot(s)
A Reed-Solomon RS coder is applied to protect the audio and data
information for transmission errors.
Security Systems
12
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Transmission Protocol
With four Standard Quality channels
Audio slot A
Audio slot B
SQ
Audio slot A
SYNC
RS frame 0
RS frame 1
RS frame 2
SQ
Audio slot B
SQ
RS frame 3
RS frame 4
1 super frame
Security Systems
13
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
data
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
RS parity
SQ
data
RS frame 5
RS parity
Transmission Protocol
With two Premium Quality channels
Audio slot A
PQ
Audio slot A
SYNC
RS frame 0
RS frame 1
RS frame 2
Audio slot B
PQ
RS frame 3
data
Audio slot B
RS frame 4
1 super frame
Security Systems
14
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
RS parity
data
RS frame 5
RS parity
System Technology
End of section
Security Systems
15
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Slide 13
System Technology
System Block Diagram
Infra-Red Radiation
Signal Processing
Audio Channel Quality Modes
Carriers and Channels
Audio Encoding and Quality
Transmission Protocol
Security Systems
1
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
I&O Manual
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Diagram Digital Infra-Red Transmission System
Transmission Protocol
DCN Next
Generation
DCN
system
Integrus
Transmitter
Up to 32
Interpreters
desks 6ch.
Audio
sources
Channels
Integrus
Radiator
Integrus
Receiver
Integrus
Radiator
Integrus
Receiver
Integrus
Radiator
Integrus
Receiver
Integrus
Radiator
Integrus
Receiver
Integrus
Charging equipment
Security Systems
2
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Infra Red Radiation
Based on transmission by modulated infra-red radiation.
Has a wavelength just above that of visible light.
Like visible light, it is reflected from hard surfaces, yet passes through
translucent materials such as glass.
Radiators are used to emission infra-red light with a wavelength of 870 nm.
Security Systems
3
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Infra- Red spectrum in relation to other spectra
%
100
75
1
50
25
4
5
2
0
400
500
600
700
3
800
1000 nm
1
Daylight spectrum 2 Sensitivity of the human eye 3 Intra- Red radiator
4
Sensitivity of the Infra- Red diode at the receiver
5
Sensitivity of the Infra- Red diode at the receiver with daylight filter
Security Systems
4
870 900
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Signal Processing
Audio
Channel 01
A/D Conversion
& Compression
4x
4x
Audio
Channel 04
Protocol Creation
& Modulation
A/D Conversion
& Compression
The Integrus system uses high frequency carrier signals (typically 2-8 MHz)
to prevent interference problems with modern light sources.
The transmission system converts analogue audio signals to digital
frequency modulated infra-red light.
The digital audio processing guarantees a constant high audio quality.
Receivers pick up the digital frequency modulated infra-red signal and
convert it back to an audio signal for a headphone.
Security Systems
5
Carrier
(to IR Radiator)
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Signal Processing main steps
1. A/D conversion - Each analogue audio channel is converted to a digital
signal.
2. Compression - To increase the amount of digital information.
3. Protocol Creation - Groups of four digital signals are combined into one
digital information stream. Fault algorithm information is added for fault
detection and correction.
4. Modulation - A high frequency carrier signal is phase-modulated with
the digital information stream.
5. Radiation – Up to 8 modulated carrier signals are combined and sent to
the infra-red radiators, which convert the carrier signals to modulated
infra-red light.
6. De-Modulation – a reversed process is used in the IR receivers to
convert the modulated infra-red light to separate analogue audio
channels.
Security Systems
6
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Audio Channel Quality modes
Up to four different audio channel quality modes:
1)
Mono, standard quality, maximum 32 channels of 10kHz
2)
Mono, premium quality, maximum 16 channels of 20kHz
3)
Stereo,standard quality, maximum 16 channels of 2x 10kHz
4)
Stereo,premium quality, maximum 8 channels of 2x 20kHz
The Standard quality mode uses less bandwidth and can be used for
transmitting speech.
For music the Premium quality mode is advisable.
Security Systems
7
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Carriers and Channels
Up to 8 different carrier signals (depending on the transmitter type) can
be transmit. Each carrier can contain up to 4 different audio channels.
The maximum number of channels per carrier is dependent on the
chosen quality modes.
Per carrier a mix of channels with different quality modes is possible, as
long as the total available bandwidth is not exceeded.
Security Systems
8
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Carriers and Channels
This table lists all possible channel combinations per carrier:
Channel Quality
10kHz
10kHz
10kHz
10kHz
10kHz
10kHz
10kHz
Mono SQ
20kHz
20kHz
10kHz (L)
10kHz
10kHz (R)
10kHz (L)
10kHz (R)
10kHz (L)
10kHz (R)
10kHz (L)
10kHz (R)
20kHz
20kHz
20kHz (L)
20kHz (R)
Carrier
Security Systems
9
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Mono PQ
Stereo SQ
Stereo PQ
Carriers and Channels
Carrier Allocation
-3 d B
2 .3 3 3
3
3 .6 6 7
4 .3 3 3
5
5 .6 6 7
6 .3 3 3
G u a rd b a n d
f (M H z )
The data is digitally modulated onto the carriers. The modulation method
used is DQPSK (Differential Quadrature Phase Shift Keying) with coherent
detection at the receiver.
The information is carried by the phase changes.
Security Systems
10
7
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Audio Encoding and Quality
All audio sent by the transmitter, is compressed by a sub-band APCM
(Adaptive Pulse Code Modulation) encoder.
System Audio Performance
Measured from the audio input of an LBB4503 to the headphone output of
an LBB4540
Audio frequency response:
Standard Quality mode………………...
: 20 Hz to 10 kHz (-3 dB)
Premium Quality…………….………….
: 20 Hz to 20 kHz (-3 dB)
Total harmonic distortion at 1kHz …
: < 0.05 %
Crosstalk attenuation at 4 kHz….….
: > 80 dB
Dynamic range………………………..
: > 80 dB
Weighted signal-to-noise ratio……..
: > 80 dB(A)
Security Systems
11
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
I&O Manual
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Transmission Protocol
Protocol and modulation technique :
according to IEC 61603 part 7
Carrier structure
Each carrier contains:
synchronization information
audio slots
data slot(s)
A Reed-Solomon RS coder is applied to protect the audio and data
information for transmission errors.
Security Systems
12
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Transmission Protocol
With four Standard Quality channels
Audio slot A
Audio slot B
SQ
Audio slot A
SYNC
RS frame 0
RS frame 1
RS frame 2
SQ
Audio slot B
SQ
RS frame 3
RS frame 4
1 super frame
Security Systems
13
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
data
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
RS parity
SQ
data
RS frame 5
RS parity
Transmission Protocol
With two Premium Quality channels
Audio slot A
PQ
Audio slot A
SYNC
RS frame 0
RS frame 1
RS frame 2
Audio slot B
PQ
RS frame 3
data
Audio slot B
RS frame 4
1 super frame
Security Systems
14
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
RS parity
data
RS frame 5
RS parity
System Technology
End of section
Security Systems
15
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Slide 14
System Technology
System Block Diagram
Infra-Red Radiation
Signal Processing
Audio Channel Quality Modes
Carriers and Channels
Audio Encoding and Quality
Transmission Protocol
Security Systems
1
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
I&O Manual
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Diagram Digital Infra-Red Transmission System
Transmission Protocol
DCN Next
Generation
DCN
system
Integrus
Transmitter
Up to 32
Interpreters
desks 6ch.
Audio
sources
Channels
Integrus
Radiator
Integrus
Receiver
Integrus
Radiator
Integrus
Receiver
Integrus
Radiator
Integrus
Receiver
Integrus
Radiator
Integrus
Receiver
Integrus
Charging equipment
Security Systems
2
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Infra Red Radiation
Based on transmission by modulated infra-red radiation.
Has a wavelength just above that of visible light.
Like visible light, it is reflected from hard surfaces, yet passes through
translucent materials such as glass.
Radiators are used to emission infra-red light with a wavelength of 870 nm.
Security Systems
3
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Infra- Red spectrum in relation to other spectra
%
100
75
1
50
25
4
5
2
0
400
500
600
700
3
800
1000 nm
1
Daylight spectrum 2 Sensitivity of the human eye 3 Intra- Red radiator
4
Sensitivity of the Infra- Red diode at the receiver
5
Sensitivity of the Infra- Red diode at the receiver with daylight filter
Security Systems
4
870 900
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Signal Processing
Audio
Channel 01
A/D Conversion
& Compression
4x
4x
Audio
Channel 04
Protocol Creation
& Modulation
A/D Conversion
& Compression
The Integrus system uses high frequency carrier signals (typically 2-8 MHz)
to prevent interference problems with modern light sources.
The transmission system converts analogue audio signals to digital
frequency modulated infra-red light.
The digital audio processing guarantees a constant high audio quality.
Receivers pick up the digital frequency modulated infra-red signal and
convert it back to an audio signal for a headphone.
Security Systems
5
Carrier
(to IR Radiator)
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Signal Processing main steps
1. A/D conversion - Each analogue audio channel is converted to a digital
signal.
2. Compression - To increase the amount of digital information.
3. Protocol Creation - Groups of four digital signals are combined into one
digital information stream. Fault algorithm information is added for fault
detection and correction.
4. Modulation - A high frequency carrier signal is phase-modulated with
the digital information stream.
5. Radiation – Up to 8 modulated carrier signals are combined and sent to
the infra-red radiators, which convert the carrier signals to modulated
infra-red light.
6. De-Modulation – a reversed process is used in the IR receivers to
convert the modulated infra-red light to separate analogue audio
channels.
Security Systems
6
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Audio Channel Quality modes
Up to four different audio channel quality modes:
1)
Mono, standard quality, maximum 32 channels of 10kHz
2)
Mono, premium quality, maximum 16 channels of 20kHz
3)
Stereo,standard quality, maximum 16 channels of 2x 10kHz
4)
Stereo,premium quality, maximum 8 channels of 2x 20kHz
The Standard quality mode uses less bandwidth and can be used for
transmitting speech.
For music the Premium quality mode is advisable.
Security Systems
7
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Carriers and Channels
Up to 8 different carrier signals (depending on the transmitter type) can
be transmit. Each carrier can contain up to 4 different audio channels.
The maximum number of channels per carrier is dependent on the
chosen quality modes.
Per carrier a mix of channels with different quality modes is possible, as
long as the total available bandwidth is not exceeded.
Security Systems
8
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Carriers and Channels
This table lists all possible channel combinations per carrier:
Channel Quality
10kHz
10kHz
10kHz
10kHz
10kHz
10kHz
10kHz
Mono SQ
20kHz
20kHz
10kHz (L)
10kHz
10kHz (R)
10kHz (L)
10kHz (R)
10kHz (L)
10kHz (R)
10kHz (L)
10kHz (R)
20kHz
20kHz
20kHz (L)
20kHz (R)
Carrier
Security Systems
9
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Mono PQ
Stereo SQ
Stereo PQ
Carriers and Channels
Carrier Allocation
-3 d B
2 .3 3 3
3
3 .6 6 7
4 .3 3 3
5
5 .6 6 7
6 .3 3 3
G u a rd b a n d
f (M H z )
The data is digitally modulated onto the carriers. The modulation method
used is DQPSK (Differential Quadrature Phase Shift Keying) with coherent
detection at the receiver.
The information is carried by the phase changes.
Security Systems
10
7
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Audio Encoding and Quality
All audio sent by the transmitter, is compressed by a sub-band APCM
(Adaptive Pulse Code Modulation) encoder.
System Audio Performance
Measured from the audio input of an LBB4503 to the headphone output of
an LBB4540
Audio frequency response:
Standard Quality mode………………...
: 20 Hz to 10 kHz (-3 dB)
Premium Quality…………….………….
: 20 Hz to 20 kHz (-3 dB)
Total harmonic distortion at 1kHz …
: < 0.05 %
Crosstalk attenuation at 4 kHz….….
: > 80 dB
Dynamic range………………………..
: > 80 dB
Weighted signal-to-noise ratio……..
: > 80 dB(A)
Security Systems
11
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
I&O Manual
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Transmission Protocol
Protocol and modulation technique :
according to IEC 61603 part 7
Carrier structure
Each carrier contains:
synchronization information
audio slots
data slot(s)
A Reed-Solomon RS coder is applied to protect the audio and data
information for transmission errors.
Security Systems
12
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Transmission Protocol
With four Standard Quality channels
Audio slot A
Audio slot B
SQ
Audio slot A
SYNC
RS frame 0
RS frame 1
RS frame 2
SQ
Audio slot B
SQ
RS frame 3
RS frame 4
1 super frame
Security Systems
13
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
data
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
RS parity
SQ
data
RS frame 5
RS parity
Transmission Protocol
With two Premium Quality channels
Audio slot A
PQ
Audio slot A
SYNC
RS frame 0
RS frame 1
RS frame 2
Audio slot B
PQ
RS frame 3
data
Audio slot B
RS frame 4
1 super frame
Security Systems
14
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
RS parity
data
RS frame 5
RS parity
System Technology
End of section
Security Systems
15
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Slide 15
System Technology
System Block Diagram
Infra-Red Radiation
Signal Processing
Audio Channel Quality Modes
Carriers and Channels
Audio Encoding and Quality
Transmission Protocol
Security Systems
1
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
I&O Manual
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Diagram Digital Infra-Red Transmission System
Transmission Protocol
DCN Next
Generation
DCN
system
Integrus
Transmitter
Up to 32
Interpreters
desks 6ch.
Audio
sources
Channels
Integrus
Radiator
Integrus
Receiver
Integrus
Radiator
Integrus
Receiver
Integrus
Radiator
Integrus
Receiver
Integrus
Radiator
Integrus
Receiver
Integrus
Charging equipment
Security Systems
2
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Infra Red Radiation
Based on transmission by modulated infra-red radiation.
Has a wavelength just above that of visible light.
Like visible light, it is reflected from hard surfaces, yet passes through
translucent materials such as glass.
Radiators are used to emission infra-red light with a wavelength of 870 nm.
Security Systems
3
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Infra- Red spectrum in relation to other spectra
%
100
75
1
50
25
4
5
2
0
400
500
600
700
3
800
1000 nm
1
Daylight spectrum 2 Sensitivity of the human eye 3 Intra- Red radiator
4
Sensitivity of the Infra- Red diode at the receiver
5
Sensitivity of the Infra- Red diode at the receiver with daylight filter
Security Systems
4
870 900
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Signal Processing
Audio
Channel 01
A/D Conversion
& Compression
4x
4x
Audio
Channel 04
Protocol Creation
& Modulation
A/D Conversion
& Compression
The Integrus system uses high frequency carrier signals (typically 2-8 MHz)
to prevent interference problems with modern light sources.
The transmission system converts analogue audio signals to digital
frequency modulated infra-red light.
The digital audio processing guarantees a constant high audio quality.
Receivers pick up the digital frequency modulated infra-red signal and
convert it back to an audio signal for a headphone.
Security Systems
5
Carrier
(to IR Radiator)
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Signal Processing main steps
1. A/D conversion - Each analogue audio channel is converted to a digital
signal.
2. Compression - To increase the amount of digital information.
3. Protocol Creation - Groups of four digital signals are combined into one
digital information stream. Fault algorithm information is added for fault
detection and correction.
4. Modulation - A high frequency carrier signal is phase-modulated with
the digital information stream.
5. Radiation – Up to 8 modulated carrier signals are combined and sent to
the infra-red radiators, which convert the carrier signals to modulated
infra-red light.
6. De-Modulation – a reversed process is used in the IR receivers to
convert the modulated infra-red light to separate analogue audio
channels.
Security Systems
6
ST/SEU-CO | 03.Mar.06
INTEGRUS Tech ST
| © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of
disposal such as copying and passing on to third parties.
Audio Channel Quality modes
Up to four different audio channel quality modes:
1)
Mono, standard quality, maximum 32 channels of 10kHz
2)
Mono, premium quality, maximum 16 channels of 20kHz
3)
Stereo,standard quality, maximum 16 channels of 2x 10kHz
4)
Stereo,premium quality, maximum 8 channels of 2x 20kHz
The Standard quality mode uses less bandwidth and can be used for
transmitting speech.
For music the Premium quality mode is advisable.
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Carriers and Channels
Up to 8 different carrier signals (depending on the transmitter type) can
be transmit. Each carrier can contain up to 4 different audio channels.
The maximum number of channels per carrier is dependent on the
chosen quality modes.
Per carrier a mix of channels with different quality modes is possible, as
long as the total available bandwidth is not exceeded.
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Carriers and Channels
This table lists all possible channel combinations per carrier:
Channel Quality
10kHz
10kHz
10kHz
10kHz
10kHz
10kHz
10kHz
Mono SQ
20kHz
20kHz
10kHz (L)
10kHz
10kHz (R)
10kHz (L)
10kHz (R)
10kHz (L)
10kHz (R)
10kHz (L)
10kHz (R)
20kHz
20kHz
20kHz (L)
20kHz (R)
Carrier
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Mono PQ
Stereo SQ
Stereo PQ
Carriers and Channels
Carrier Allocation
-3 d B
2 .3 3 3
3
3 .6 6 7
4 .3 3 3
5
5 .6 6 7
6 .3 3 3
G u a rd b a n d
f (M H z )
The data is digitally modulated onto the carriers. The modulation method
used is DQPSK (Differential Quadrature Phase Shift Keying) with coherent
detection at the receiver.
The information is carried by the phase changes.
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Audio Encoding and Quality
All audio sent by the transmitter, is compressed by a sub-band APCM
(Adaptive Pulse Code Modulation) encoder.
System Audio Performance
Measured from the audio input of an LBB4503 to the headphone output of
an LBB4540
Audio frequency response:
Standard Quality mode………………...
: 20 Hz to 10 kHz (-3 dB)
Premium Quality…………….………….
: 20 Hz to 20 kHz (-3 dB)
Total harmonic distortion at 1kHz …
: < 0.05 %
Crosstalk attenuation at 4 kHz….….
: > 80 dB
Dynamic range………………………..
: > 80 dB
Weighted signal-to-noise ratio……..
: > 80 dB(A)
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I&O Manual
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disposal such as copying and passing on to third parties.
Transmission Protocol
Protocol and modulation technique :
according to IEC 61603 part 7
Carrier structure
Each carrier contains:
synchronization information
audio slots
data slot(s)
A Reed-Solomon RS coder is applied to protect the audio and data
information for transmission errors.
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Transmission Protocol
With four Standard Quality channels
Audio slot A
Audio slot B
SQ
Audio slot A
SYNC
RS frame 0
RS frame 1
RS frame 2
SQ
Audio slot B
SQ
RS frame 3
RS frame 4
1 super frame
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data
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disposal such as copying and passing on to third parties.
RS parity
SQ
data
RS frame 5
RS parity
Transmission Protocol
With two Premium Quality channels
Audio slot A
PQ
Audio slot A
SYNC
RS frame 0
RS frame 1
RS frame 2
Audio slot B
PQ
RS frame 3
data
Audio slot B
RS frame 4
1 super frame
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RS parity
data
RS frame 5
RS parity
System Technology
End of section
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