1. John Roston and Jeremy R. Cooperstock Centre for Interdisciplinary Research in Music Media and Technology McGill University Low-latency HD: Shared Spaces and Undersea Window

2. Low-latency

3. Videoconferencing: The Future? Zack Snyder’s “Online Jam”, October 2001

4. For those with DSL at home... yeah, right!

5. Pinchas Zuckerman, Columbia U, NYC Wu Ji, Canarie ARDNOC, Ottawa “Playing Together” experiment New York-Ottawa, Remote Masters class, Dec. 8, 2000

6. Latency: The Interaction-Killer or put another way...

7. Bandwidth vs. Latency near-equivalent quality of encoded video (HD-SDI vs HDV or SDI vs DV/MPEG) at greatly reduced bandwidth but… compression takes time

8. * This is a theoretical “best-case” scenario. Actual performance may vary. The manufacturer makes no warranties, either express or implied, and will not be held liable for damage resulting from use of the product. Certain restrictions may apply. Offer void where prohibited by law. Batteries not included. compress transmit 10 0 20 40 30 50 70 60 80 networks light speed: Mtl-LA net latency Mtl-LA large ensemble activity small ensemble lip synch MPEG* acquire 90 100 ms speech, drumming Tolerated Synchronicity

9. Current Projects

10. Going deep under… to 2000m HD video over new undersea networks – VENUS and NEPTUNE

11. “Undersea Window” Project VENUS – Test Camera 100m NEPTUNE – Cameras 2,000m

12. System Architecture

13. Shared Spaces: Panoramic High-Def See everything - no camera panning

14. Conference Room Configuration

15. C4 OME @BCnet to servers w/ GbE i/f C4 OME @RISQ UBC 10G switch McGill 10G switch RISQ fibre BCnet fibre OC-192 10G Wan Phy to servers w/ GbE i/f 10G Wan Phy CA*net 4 local loop for end-end lightpath prgram scope Network Architecture

16. New challenge: Real-time mosaicing

17. Sample Result Can your camera do this?

18. Previous Projects

19. Distributed Violin Duet McGill-Université de Montréal demo, Nov. 21, 2001 IP over 1 Gbps fiber link < 30ms latency

20. McLuhan: “The medium is the message” Cooperstock's Corollary: “The medium must be faster than the message.” * * but between protocol deficiencies (TCP, UDP), competing data flows, process scheduling on a budget, ARQ (retransmission management) without QoS, interface HW/SW “uncooperativeness”, aggressive router policies, multi-format support, echo suppression, and interface complexity… it’s much more than just the medium

21. Violin Masters Class Montreal-Ottawa Trial with Pinchas Zuckerman, Feb. 20, 2002

22. Size does matter

23. Distributed Jazz Jam Montreal-Stanford (CCRMA), Research Demo, Oct. 24, 2002

24. The “Sweet Spot” Problem

25. Vibrosensory Transmission VRQ demo, March 8, 2004

26. … and another application

27. Thank you. Further information available: http://ultravideo.mcgill.edu