Title: John Roston and Jeremy R. Cooperstock Centre for Interdisciplinary Research in Music Media and Technology McGill University
1Low-latency HD Shared Spaces and Undersea
Window
- John Roston and Jeremy R. CooperstockCentre for
Interdisciplinary Research in Music Media and
TechnologyMcGill University
2Low-latency
3Videoconferencing The Future?
- Zack Snyders Online Jam, October 2001
4For those with DSL at home...
5Playing Together experiment
- New York-Ottawa, Remote Masters class, Dec. 8,
2000
Pinchas Zuckerman, Columbia U, NYC
Wu Ji, Canarie ARDNOC, Ottawa
6Latency The Interaction-Killer
7Bandwidth 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
8Tolerated 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.
9Current Projects
10Going deep under to 2000m
HD video over new undersea networks VENUS and
NEPTUNE
11Undersea Window Project
- VENUS Test Camera 100m
- NEPTUNE Cameras 2,000m
12System Architecture
13Shared Spaces Panoramic High-Def
- See everything - no camera panning
14Conference Room Configuration
15Network 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
16New challenge Real-time mosaicing
17Sample Result
18Previous Projects
19Distributed Violin Duet
- McGill-Université de Montréal demo, Nov. 21, 2001
- IP over 1 Gbps fiber link
- lt 30ms latency
20McLuhan 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
21Violin Masters Class
- Montreal-Ottawa Trial with Pinchas Zuckerman,
Feb. 20, 2002
22Size does matter
23Distributed Jazz Jam
- Montreal-Stanford (CCRMA), Research Demo, Oct.
24, 2002
24The Sweet Spot Problem
25Vibrosensory Transmission
26 and another application
27Thank you. Further information
availablehttp//ultravideo.mcgill.edu