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Live Music Mode: Case Study and Development
Performing Arts Production Workshop
Trieste, Italy
14 July 2009
Stefan Karapetkov
Emerging Technologies Director
Polycom
3
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
5
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 timeGroup-based videoconferencingLive web streaming - archival video distancelearning.msmnyc.edu/live
9
Video Network Elements
Personal Telepresence
Room Based Telepresence
Soft Client
Recording
Video Border Proxy
Media Servers
Management Application
Gateways
Directory PresenceContent Mgmt GK/Proxy
11
Advanced Audio Compression Technology
Data Bit Rate
Au
dio
Fre
qu
ency G.722.1G.722.1
G.722G.722
AMR-NBAMR-NB
G.711G.711
G.722.2G.722.2
Wid
eb
an
d
Na
rro
wb
an
d
4 kbps 64 kbps 128 kbps
Siren 14 stereoSiren 14 stereo
G.729AG.729AG.728G.728
G.722.1CG.722.1C
Su
per
Wid
e
G.719 stereo G.719 stereo
Siren 22 stereoSiren 22 stereo
12
Audio Codec Highlights
Bandwidth Bit rate Delay Complexity Standard Algorithm
SIREN22 22 kHz32-64 kbps mono
64-128 kbps stereo
40 ms 18.4 MIPS N/A Transform
G.719 20 kHz32-128 kbps mono
64-256 kbps stereo
40 ms 17.7 MIPS ITU Transform
MP3 ≤ 20 kHz 64-384 kbps ≥ 54 ms > 100 MIPS ISO Transform
MPEG-4 AAC-LD ≤ 20 kHz
24-192 kbps(TAA: 64 kbps
mono128 kbps stereo)
≥ 20 ms > 130 MIPS ISO Transform
13
Automatic Gain Control (AGC)
Signal strength
AGC adds 0dBAGC adds 3dB
AGC adds 6dB
Max. 12 feet from microphone
Nominal is 2 feet from microphone
14
Automatic Noise Suppression (ANS) & Noise Fill
Signal White noise
Signal
Signal Comfort Noise
ANS Noise Fill
16
Advanced Video Technology: High DefinitionQ
ualit
yQ
ualit
y
BandwidthBandwidth384kbps 512kbps 1Mbps 6Mbps
480p
720p
352x288
704x480
1280x720
1080p4K
1920x10803840x2160
Email [email protected] http://videonetworker.blogspot.com/