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OptIPuter Teleconferencing Next Steps Dan Sandin Jan 2007

OptIPuter Teleconferencing Next Steps Dan Sandin Jan 2007. An Embarrassment of Riches. HDV 25Mb 1 sec Audio interleaved DVCPRO HD 100Mb 300ms Audio interleaved HDSDI 1.5Gb < 200ms? Audio interleaved Y U V HD .8Gb < 100ms? Audio separate

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OptIPuter Teleconferencing Next Steps Dan Sandin Jan 2007

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  1. OptIPuter Teleconferencing Next Steps Dan Sandin Jan 2007

  2. An Embarrassment of Riches • HDV 25Mb 1 sec • Audio interleaved • DVCPRO HD 100Mb 300ms • Audio interleaved • HDSDI 1.5Gb < 200ms? • Audio interleaved • Y U V HD .8Gb < 100ms? • Audio separate • Varrier Stereo Video 225Mb < 100ms • Audio separate • GigE camera .8Gb <100ms • No audio

  3. 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

  4. Organizations • HDV 25Mb 1 sec • everybody • DVCPRO HD 100Mb 300ms • qvidium calit2 • HDSDI 1.5Gb < 200ms • research channel UltraGrid Calit2 • Y U V HD .8Gb < 200ms • EVL UltraGrid • Varrier Stereo Video 225Mb < 100ms • EVL Calit2 • GiGE camera .8Gb <100ms • SARA EVL Calit2

  5. Bandwidth • HDV 25Mb 1 sec • Audio interleaved • DVCPRO HD 100Mb 300ms • Audio interleaved • HDSDI 1.5Gb < 200ms • Audio interleaved • Y U V HD .8Gb < 200ms • Audio separate • Varrier Stereo Video 225Mb < 100ms • Audio separate • GigE camera .8Gb <100ms • No audio

  6. Audio • HDV 25Mb 1 sec • Audio interleaved • DVCPRO HD 100Mb 300ms • Audio interleaved • HDSDI 1.5Gb < 200ms • Audio interleaved • Y U V HD .8Gb < 200ms • Audio separate • Varrier Stereo Video 225Mb < 100ms • Audio separate • GigE camera .8Gb <100ms • No audio

  7. Latency One-Way Transmission Times • HDV 25Mb 1 sec • Audio interleaved • DVCPRO HD 100Mb 300ms • Audio interleaved • HDSDI 1.5Gb < 200ms • Audio interleaved • Y U V HD .8Gb < 200ms • Audio separate • Varrier Stereo Video 225Mb < 100ms • Audio separate • GigE camera .8Gb <100ms • No audio

  8. 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

  9. 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 < 200ms • None; best Q largely depends on camera • Y U V HD .8Gb < 200ms • None; best Q, largely depends on camera • Varrier Stereo Video 225Mb < 100ms • None; SD but in stereo • GigE camera .8Gb <100ms • None; camera has Q problems

  10. 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 <500Mb <100ms • spectacular quality !

  11. 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

  12. SAGE and Teleconferencing • SAGE Visual casting supports YUV and RGB video

  13. 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

  14. Audio Afterthoughts • Echo cancellation can be accomplished with AccuMic PC • Limitations …

  15. Audio Afterthoughts • SAGE has to develop an audio standard for visual casting

  16. Persistent setupfirst pass • DVCPRO HD using Qvidium boxes • CALIT2 UCSD, Calit2 UCI, EVL • AccuMic Echo calculation • Mono simple PCM audio

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

  18. Teleconferencing • Discussion

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