OptIPuter

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• OptIPuter
• Teleconferencing Next Steps
• Dan Sandin
• Jan 2007

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An Embarrassment of Riches

• HDV 25Mb 1 sec
• Audio interleaved
• DVCPRO HD 100Mb 300ms
• Audio interleaved
• HDSDI 1.5Gb
• Audio interleaved
• Y U V HD .8Gb
• Audio separate
• Varrier Stereo Video 225Mb
• Audio separate
• GigE camera .8Gb
• No audio

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Marketing Categories

• Broadcast
• HDSDI
• Highest quality, most expensive, low Q/
• Highly standardized, inflexible
• Prosumer
• HDV, DVCPRO
• Medium to high quality best Q/
• Quite standardized, inflexible
• Industrial
• Y U V, Varrier Stereo, GigE
• Large range of Q and
• Quite standardized, very flexible

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Organizations

• HDV 25Mb 1 sec
• everybody
• DVCPRO HD 100Mb 300ms
• qvidium calit2
• HDSDI 1.5Gb
• research channel UltraGrid Calit2
• Y U V HD .8Gb
• EVL UltraGrid
• Varrier Stereo Video 225Mb
• EVL Calit2
• GiGE camera .8Gb
• SARA EVL Calit2

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Bandwidth

• HDV 25Mb 1 sec
• Audio interleaved
• DVCPRO HD 100Mb 300ms
• Audio interleaved
• HDSDI 1.5Gb
• Audio interleaved
• Y U V HD .8Gb
• Audio separate
• Varrier Stereo Video 225Mb
• Audio separate
• GigE camera .8Gb
• No audio

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Audio

• HDV 25Mb 1 sec
• Audio interleaved
• DVCPRO HD 100Mb 300ms
• Audio interleaved
• HDSDI 1.5Gb
• Audio interleaved
• Y U V HD .8Gb
• Audio separate
• Varrier Stereo Video 225Mb
• Audio separate
• GigE camera .8Gb
• No audio

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Latency One-Way Transmission Times

• HDV 25Mb 1 sec
• Audio interleaved
• DVCPRO HD 100Mb 300ms
• Audio interleaved
• HDSDI 1.5Gb
• Audio interleaved
• Y U V HD .8Gb
• Audio separate
• Varrier Stereo Video 225Mb
• Audio separate
• GigE camera .8Gb
• No audio

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Latency Why So Late

• Every frame takes 33 ms
• Every piece of hardware and every software module
  wants a 2 or 3 frame buffer
• For us, it is almost never the network
• We need to change that so it is the network

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Compression and Resolution or Quality

• HDV 25Mb 1 sec
• MPEG long GOP, low Q
• DVCPRO HD 100Mb 300ms
• JPEG-like better Q
• HDSDI 1.5Gb
• None best Q largely depends on camera
• Y U V HD .8Gb
• None best Q, largely depends on camera
• Varrier Stereo Video 225Mb
• None SD but in stereo
• GigE camera .8Gb
• None camera has Q problems

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Compression and Resolution or Quality

• Uncompressed talking heads HD at 1.5GB is a
  ridiculous waste of resources
• Except for broadcast production
• Except for science data
• Except for here? or maybe a TV studio, you have
  never seen uncompressed HD
• Compression can be done in less than a frame
• NTT 4K Jpeg 2000
• spectacular quality !

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SAGE and Teleconferencing

• SAGE Visual casting supports YUV and RGB video
• Calit2 and EVL will make a DVCPRO HD to SAGE
  converter
• Note need to buy xmit box and receive software
  from Qvidum
• UltraGrid and Research Channel have expressed
  interest in doing conversion routines to SAGE
  Visual Casting

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SAGE and Teleconferencing

• SAGE Visual casting supports YUV and RGB video

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SAGE and TeleconferencingSupport of several
systems

• Except for SAGE Visual Casting, a
  receiver box for each source will be used
• Potentially support a large number of video
  compression standards

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Audio Afterthoughts

• Echo cancellation can be accomplished with
  AccuMic PC
• Limitations

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Audio Afterthoughts

• SAGE has to develop an audio standard for visual
  casting

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Persistent setupfirst pass

• DVCPRO HD using Qvidium boxes
• CALIT2 UCSD, Calit2 UCI, EVL
• AccuMic Echo calculation
• Mono simple PCM audio

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Near Future

• HDMI camera and capture card
• Multi-channel audio with each SAGE window
• Audio localization with each window

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Teleconferencing

• Discussion