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GIGAMEDIA, co-operative
postproduction in film and TV
Terena Networking Conference 2001
Markus Berg, Dipl.-Ing.
Institut für Rundfunktechnik GmbH
© IRT/NNM
Markus Berg
16 May 01
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Agenda
• Introduction
• Why ATM?
• Tests and experiences with ATM
networks for broadcast/production
applications
• GIGAMEDIA applications
• Conclusions
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Markus Berg
16 May 01
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Acknowledgement
The GIGAMEDIA project has been
partially funded by the German Federal
Ministry of Education and Research
under contract No. TK602-NT109.2.
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Markus Berg
16 May 01
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Project partners
• Das Werk - Munich
• GMD, Forschungszentrum
Informationstechnik (FOKUS) - Berlin
• Heinrich-Hertz-Institut - Berlin
• IRT, Institut für Rundfunktechnik GmbH
- Munich
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Overview
• The goal of the project is to examine
applications and network structures for cooperative postproduction of TV and film in the
Gigabit testbed infrastructure of the DFN
(Deutsches Forschungs-Netz).
• Applications and network infrastructure to
enhance multimedia services over the DFN
Gigabit testbed (GTB) are realised and used
for the distributed production environment of
the project partners.
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ATM Network Connectivity
HHI
Das Werk
GTB
Berlin - München
MM
BRAIN
Berlin
MNet
München
LRZ
GMD FOKUS
EANTC
SM
IRT
SM
Adlershof
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Why ATM?
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Requirements for TV/film
production networks
•
•
•
•
•
•
extremely low jitter/wander
low latency
no transmission interruptions
extremely low bit error and cell loss ratio
point-to-point and point-to-multipoint connections
easy management for the complete production
network including adapters
• high speed file transfer between video/audio servers
• high availability
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ATM
• ATM guarantees the negotiated bandwidth by
establishing and confirming connections with the
wanted attributes
• ATM keeps jitter in tight and predictable limits
• ATM provides low latency for the transport
• ATM will be used as backbone technology for critical
broadcast and production applications
 best solution for the QoS needed for
distributed production
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16 May 01
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IP
• originally IP was a “best-effort” service for robust transfer of data
packets from source to destination
• overprovisioning of bandwidth (“throw with bandwidth on it ”)
does not really help if multimedia content will be handled at
large scale
• meanwhile some additional protocols are developed or under
discussion like RSVP, Diffserv, etc. enabling the definition and
signalling of service classes (CoS)
• MPLS, a new approach for traffic engineering does not
guarantee QoS
• IP streams may be given priority in concurrence with others, but
there is again the problem of missing bandwidth in the same
priority class
the IP QoS problem is not yet solved for critical
broadcast/production streaming applications
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16 May 01
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Transmission of uncompressed
digital video over ATM
• loss less (transparent) transmission of a
digital video stream (270 Mbit/s, highest
quality)
• low latency (<300 µs), no video/audio
compression
• applications:
–
–
–
–
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distributed production
near delay free interviews
high quality telemedicine
telerobotic
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SDI over ATM
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Tests and experiences with
ATM networks for
broadcast/production
applications
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SYSTEMS 2000
• multi service network platform for broadcast
applications
• dark fibre Wide Area Connection between IRT
(Munich-Freimann) and the fair (Munich-Riem)
• WDM using 3 wavelengths, 2x ATM STM-4, 1x ATM
STM-1
• demonstration of different broadcast applications:
– transmission of an uncompressed digital video stream (270
Mbit/s) „SDI over ATM“ including Live-Interviews and video
inputs from IRT‘s TV studio
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SYSTEMS 2000
– distribution and contribution of TV programmes (MPEG-2
4:2:2) over the same ATM link with guaranteed Quality of
Service
– high speed file transfer with the ATP protocol (native ATMapplication) with bit rates > 160 Mbit/s
– ATM-encryption
– storage Area Network (SAN), server connection via ATMWAN using Fibre Channel and/or SCSI
– video- and audio streaming (Windows Media Encoder and
Real Encoder)
– remote management of the IRT ATM network from the fair
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SYSTEMS 2000
Multiservice Broadband Networks for Broadcasters
Citynet
Uni-TV
Studio
IRT
SDI
ATM
Adapter
Munich
Campus
Campus Freimann
SDI
ATM
Adapter
270 Mbit/s
MPEG 2
40 Mbit/s
MPEG 2
40 Mbit/s
40 Mbit/s
Technical
University
Munich
MPEG 2
40 Mbit/s
German
Research Network
DFN
MPEG 2
40 Mbit/s
University
Erlangen
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SDI
ATM
Adapter
SDI
ATM
Adapter
Institut für Rundfunktechnik
Hospitals
Movie/TV
Production
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SYSTEMS 2000
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IBC 2000
• ATM-Wide Area Network (WAN) (622
Mbit/s) between Munich (IRT) and the
IBC booth in Amsterdam
• demonstration of distributed production,
post-production as well as distribution
and contribution of TV programmes on
a single network infrastructure
• applications similar to SYSTEMS 2000
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IBC 2000
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ATM over EUROVISION
• included LAN and WAN networks (combination of
terrestrial SDH and the EUROVISION satellite
network of the EBU) using ATM
• unidirectional distribution of TV programmes (34
Mbit/s ATM)
• multiplexing of several TV programmes into one
ATM connection
• video/audio file transfer on a bi-directional E1
(ATM) with high round-trip delays (about 0.5 sec)
• ATM and codec management on bi-directional E1
(ATM)
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ATM over EUROVISION
EUROVISION NET
IRT
D1
V
A
MPEG 4:2 :2
Coder
ATM
Testsystem
STM-1
MOD/DEM
(34 Mbit/s)
File
Server
STM-1
STM-1
ARD STERN
FFM
MOD/DEM
(2 Mbit/s)
MOD/DEM
(34 Mbit/s)
MOD/DEM
(2 Mbit/s)
34 Mbit/s
2 Mbit/s
FFM
34 Mbit/s
ATM Switch
ATM
Switch
ATM
Switch
ATM Layer
STM-1
STM-1
2 Mbit/s
STM-1
STM-1
ATM
Testsystem
File
Server
EBU
GENEVA
STM-1
MPEG 4:2 :2
SMA
SMA
V
A
Broadcaster Layer
D5
Provider Layer
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Results
• Easy set-up of the ATM connection (management
system located at IRT)
• The full functionality of the ATM based transmission
of multiplexed TV programmes via MPEG 4:2:2
codecs with direct ATM interfacing and on a
unidirectional E3 satellite link in combination with
WAN and LAN networks was demonstrated and
proofed.
• The fast file transfer together with the ATM
management on a bi-directional E1 connection on
combined LAN, WAN and satellite links and codecs
was demonstrated and proofed (even with round-trip
delays exceeding 0.5 seconds, both the interworking
of the file servers and the management connections
were save without any problems).
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GIGAMEDIA applications
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Example: Distributed
production of commercials
• production of commercials to be shown on plasma screens in
super markets
• production house cooperates with post production house to
share resources
• all partners including the client use the same network (GTB)
• real-time video transmission between the two production
partners (270 Mbit/s, SDI) over ATM
• video file transfer (the produced clip) between video servers at
every location
• preview of the material by the client (MPEG-4, low bit rate)
• video conference between the producers and the client during
production
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Production house
(HHI)
Post-production house
(IRT)
Control & video conference
Recorder
ATM<-> SDI
remote
video switch
Control & video conference
Recorder
GTB
GTB
Postproduction
MPEG-4 RT-Decoder
Video-Server
Video-Server
Markus Berg
Control & video conference
Storage & distribution
MPEG-4 RTEncoder
© IRT/NNM
ATM<-> SDI
.
Off-line
Form.-Conv.
Client
(GMD)
16 May 01
Video-Server
Slide: 25
Production house
(HHI)
Post-production house
(IRT)
Client
(GMD)
Shoot film (TV)
Store on recorder
ATM<-> SDI
Transmit video (SDI)
& video conference
ATM<-> SDI
GTB
Receive video (SDI)
& video conference
Post-production of
video
ATM<-> SDI
Receive video (SDI)
& video conference
MPEG-4 RT-encode
& streaming & view
video conference
(discussion of production)
ATM<-> SDI
GTB
GTB
GTB
Transmit video (SDI)
& video conference
MPEG-4 reception,
RT-decode &
view
video conference
(discussion of production)
GTB
GTB
MPEG-4 reception,
RT-decode &
view
video conference
(discussion of production)
Off-line formats conversion
File transfer
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GTB
Markus Berg
GTB
16 May 01
File reception
Transfer to storage
media & distribution
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Distributed post processing
Video server
D5-Recorder
IRT
SDI
SDI
ATM
ATM
HHI
GTB
D1-Recorder
SDI
ATM
das werk
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Video streaming and Remote
Viewing
Video Server,
GMD
GTB
Video Client,
HHI
Video Client,
IRT
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Video Server and Joint
Viewing
Control
Video Client,
GMD
Video Server,
GMD
GTB
Videoconference
Video Client,
HHI
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Adaptive Streaming
reserved
elastic
hybrid
hybrid adaptive
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Conclusions
• distributed production of film/TV needs high
speed networks with guaranteed QoS (ATM),
• GIGAMEDIA has built up such an
infrastructure including video conferences
and preview of the produced material in
MPEG-4 at low bit rates
• the transmission of uncompressed digital
video over ATM is the key application
• GIGAMEDIA develops remote control for SDI
equipment over the network
© IRT/NNM
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Conclusions (2)
• today, ATM is the only technology that fulfils
the rigid requirements of professional
broadcast applications for production and
post production
• at this time, IP cannot provide solutions for
critical broadcast real-time applications, but
for some applications (low bit rate streaming,
file transfer) IP is inevitable
• adaptive streaming is a good (and cheap)
alternative for reserved data transmission
(non real-time)
© IRT/NNM
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16 May 01
Slide: 32
Thank you!
• This presentation was created with
additional contributions from
– H. Hofmann (IRT)
– R. Schäfer (HHI)
– J. Tiemann (GMD FOKUS)
© IRT/NNM
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16 May 01
Slide: 33
Contact
Markus Berg
Institut für Rundfunktechnik GmbH
Floriansmühlstr. 60
80939 München
Tel.: +49 89 / 32399 – 279
Fax: +49 89 / 32399 - 351
© IRT/NNM
Markus Berg
16 May 01
E-Mail: [email protected]
web: http://www.irt.de
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