Transcript Web vs. Video

Live Music Mode:
Case Study and Development
Stefan Karapetkov
Emerging Technologies Director
Polycom
Performing Arts Production Workshop
Trieste, Italy
14 July 2009
Manhattan School of Music
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Manhattan School of Music
International Conservatory
of Music (1918)
Offering BM, MM and DMA
in Classical & Jazz Music
800+ students from over 48
countries
350 Faculty
400 students in Precollege
Division (5-17)
400+ Public Concerts/Year
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Manhattan School of Music
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Core Philosophy and Technologies
Live, interactive audio-visual
communication in virtual environment
 Connect, Interact, Listen, Learn
Integration of standards-based,
interoperable collaboration video solutions
in real time
Group-based videoconferencing
Live web streaming - archival video
 distancelearning.msmnyc.edu/live
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Pinchas Zukerman at Canada Art Centre
Teaches a Student in New York
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Classical Program at MSM
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Jazz Program at MSM
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Video Network Elements
Soft Client
Personal
Telepresence
Room Based
Telepresence
Gateways
Video Border Proxy
Management Application
Recording
Content Mgmt
GK/Proxy
Presence Directory
Media Servers
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Audio and Video Compression
Concert Site
Remote Site
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Super Wide
Siren 22 stereo
G.719 stereo
Siren 14 stereo
G.722.1C
G.722.1
G.722
G.722.2
Narrowband
Wideband
Audio Frequency
Advanced Audio Compression Technology
G.711
G.728
G.729A
AMR-NB
4 kbps
64 kbps
Data Bit Rate
128 kbps
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Audio Codec Highlights
Bandwidth
SIREN22
22 kHz
G.719
20 kHz
MP3
≤ 20 kHz
≤ 20 kHz
MPEG-4
AAC-LD
Bit rate
32-64 kbps mono
64-128 kbps
stereo
32-128 kbps mono
64-256 kbps
stereo
Delay
Complexity Standard Algorithm
40 ms
18.4 MIPS
N/A
Transform
40 ms
17.7 MIPS
ITU
Transform
64-384 kbps
≥ 54 ms > 100 MIPS
ISO
Transform
24-192 kbps
(TAA: 64 kbps
mono
128 kbps stereo)
≥ 20 ms > 130 MIPS
ISO
Transform
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Automatic Gain Control (AGC)
AGC adds 0dB
AGC adds 3dB
AGC adds 6dB
Signal strength
Nominal is 2 feet
from microphone
Max. 12 feet from
microphone
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Automatic Noise Suppression (ANS) & Noise Fill
ANS
Noise Fill
Signal
Signal
White noise
Signal
Comfort
Noise
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Acoustic Echo Cancellation (AEC)
Echo
AEC
Coupling
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Advanced Video Technology: High Definition
Quality
4K
1080p
720p
3840x2160
1920x1080
480p
SD
CIF
HD
1280x720
704x480
352x288
384kbps
512kbps 1Mbps 6Mbps
Bandwidth
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Email [email protected]
Blog http://videonetworker.blogspot.com/