John Roston and Jeremy R. Cooperstock Centre for Interdisciplinary Research in Music Media and Technology McGill University - PowerPoint PPT Presentation

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John Roston and Jeremy R. Cooperstock Centre for Interdisciplinary Research in Music Media and Technology McGill University

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John Roston and Jeremy R. Cooperstock. Centre for ... speech, drumming. Tolerated Synchronicity. Current Projects. Going deep under... to 2000m ... – PowerPoint PPT presentation

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Title: John Roston and Jeremy R. Cooperstock Centre for Interdisciplinary Research in Music Media and Technology McGill University


1

Low-latency HD Shared Spaces and Undersea
Window
  • John Roston and Jeremy R. CooperstockCentre for
    Interdisciplinary Research in Music Media and
    TechnologyMcGill University

2
Low-latency
3
Videoconferencing The Future?
  • Zack Snyders Online Jam, October 2001

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

5
Playing Together experiment
  • New York-Ottawa, Remote Masters class, Dec. 8,
    2000

Pinchas Zuckerman, Columbia U, NYC
Wu Ji, Canarie ARDNOC, Ottawa
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
Tolerated Synchronicity
activity
100ms
90
10
0
20
40
30
60
80
50
70
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.
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
Network Architecture
C4 OME _at_RISQ
C4 OME _at_BCnet
UBC 10G switch
McGill 10G switch
BCnet fibre
RISQ fibre
to servers w/ GbE i/f
to servers w/ GbE i/f
CAnet 4
10G Wan Phy
OC-192
10G Wan Phy
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
  • lt 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 its
    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
availablehttp//ultravideo.mcgill.edu
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