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Current Advanced Teleconferencing Solutions Dan Sandin EVL Feb 7 2006

Current Advanced Teleconferencing Solutions Dan Sandin EVL Feb 7 2006. HDV Teleconferencing. Compression in camera Use widely deployed HDV format 1920 by 1080 I px but resolution < 1400 Bayer 1200 by 720 p has less latency Inter-frame Mpeg compression Latency

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Current Advanced Teleconferencing Solutions Dan Sandin EVL Feb 7 2006

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  1. Current Advanced Teleconferencing Solutions Dan Sandin EVL Feb 7 2006

  2. HDV Teleconferencing • Compression in camera • Use widely deployed HDV format • 1920 by 1080 I px but resolution < 1400 Bayer • 1200 by 720 p has less latency • Inter-frame Mpeg compression • Latency • In practice > 2 sec round trip • Observed at evl > 4 sec with VLC <25 sec • Bandwidth • 25Mbit each way with sound

  3. HDV Teleconferencing • Current State • VLC windows support • VLC Linux support ??? • SVC needs audio decode • Robert Luc ?? • Disadvantages • Huge latency > 2 sec round trip • Advantages • Nearly done, cheep, Linux

  4. DVCPRO HD Teleconferencing • Compression in camera • Will be widely deployed HDV format • 1920 by 1080 px but resolution ~ 1600 Bayer • 24p 30 i • AG-HVX200 P2 HD camera • intra-frame Jpeg compression • ~ $6000 • Latency • In practice ?? • Bandwidth • 100 Mbit each way with sound

  5. DVCPRO HD Teleconferencing • Development • Need to test latency and quality • Need to develop software decode • I meet with Panasonic feb 8 06

  6. HDSDI Teleconferencing • No compression 4-2-2 • Use widely deployed HD format • 1920 by 1080 x 30 hz Interlace • Latency • In theory < 250ms round trip • calit2 installation predicted to be ~ 260 - 400ms round trip • Needs to measured • Bandwidth • > 1.5 Gbit each way with sound • Could modify software to truncate 10bit to 8 bit <1Gbit

  7. HDSDI Teleconferencing • Advantages • Use widely deployed HD format • Standard broadcast equipment • Potentially low latency • Best quality of currently contemplated systems • Disadvantages • Lots of unnecessary bandwidth • Needs frame grabber (SDI) • Expensive to do at full rez ( with display) • $24,000 gets you ~ 1400 lines • $64,000 gets you full 1920 lines

  8. HDSDI Teleconferencing • Development at evl • Will purchase equipment in next weeks. • Two windows computers • Transmit • HD10 Analog to HDSDI converter Analoge component to HDSDI SMPTE-292 • $1,200 • Black Magic DeckLink HD Pro 4:2:2 for HDSDI to framebuffer • $ 1,500 http://www.blackmagic-design.com/products/hd/ • Software that packet smpte-292 (need to find out standard?)

  9. HDSDI Teleconferencing • Receive • De-packet software to frame buffer • AJA Xena HS for framebuffer to HDSDI • $ 1,800 http://www.aja.com/products_xena.html • Some HDSDI to DVI or component box to get to display • Other groups have frame buffer to computer display software that may be compatible?

  10. HDSDI Teleconferencing • Development at evl • I imagine these HDSDI to frame buffer and frame buffer to HDSDI do not have Linux drivers. • Packetized smpte 292 should not be hard to decode and display • We could use taravision boards to transmit in Linux.

  11. HDSDI Teleconferencing • Development at evl, How do we fit in • Copy UW system and leave it independent • Linux receive network hd, display on sage • Jpeg or jpeg 2000 compression • Use hardware acceleration

  12. Varrier stereo Teleconferencing

  13. Varrier stereo Teleconferencing • No Compression • Yuv 4-1-1 • 640 480 by 30fps x 2 P • Compression possible • Small c mount cameras • unibran Fire-i400™ • ~$500 each with lens • Latency • In theory < 250ms round trip • In practice 330 ms round trip • Bandwidth • 220Mb with sound each way

  14. Varrier stereo Teleconferencing • Advantages • Stereo without glasses • Better than NTSC, great looking, life size images • Compression possible • EVL developed software environment with deep control • Computer interface 1394 • Latency • Good 330 ms • Can be made smaller goal is 200ms round trip • Bandwidth • 220Mb with sound each way • Modest , can be made smaller

  15. Varrier stereo Teleconferencing • Development • Currently deployable • Add compression • in process • Recording playback combining with VR compression • More video formats

  16. Varrier stereo Teleconferencing • Development • Currently deployable • Add compression • in process • Recording playback combining with VR compression • More video formats • Possible connection Use NVIDIA texture decompression for media file playback on SAGE SHD and bigger. 8 to 1 compression

  17. Varrier stereo Teleconferencing • Development • Opportunities for more interoperation of varrier and SAGE

  18. GigE camera Teleconferencing • GigE industrial camera • 1920 by 1080 by 30hz P by 12bits/component • Bayer pattern color so rez is about 2/3??

  19. GigE camera Teleconferencing • GigE industrial camera • 1920 by 1080 by 30hz P by 12bits/component • Bayer pattern color so rez is lower than a 3 chip camera • Compression possible • Small c mount cameras ~$5000 each • Latency • rough measurement < 400 ms round trip • In practice need to measure round trip • Bandwidth • ~800 Mb with out sound each way

  20. GigE camera Teleconferencing • Development at evl • Windows demonstrated • Linux driver problems • Write our own drivers for Linux • Use windows drivers • Windows send Linux receive. • Add compression

  21. Teleconferencing • discussion

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