Presentation Transcript
High Definition Video Real Time Multipoint Distribution: High Definition Video Real Time Multipoint Distribution Ludek Matyska
CESNET & Masaryk University Brno
Czech Republic
What: What Use HD (1920x1080, 60 fields (half frames) per second) to capture, store and distribute high quality video material for scientific and educational purposes – streaming
Use of HD to support high quality videoconferences
Research at multipoint high bandwidth stream distribution using overlay user controllable networks
iGrid2005 Demo Setup: iGrid2005 Demo Setup HD Multipoint Videoconference (CZ101)
Three participating sites:
Masaryk University Brno, Czech Republic
Louisiana State University, Baton Rouge, Louisiana
UCSD, San Diego
How (Video): How (Video) Capture
HD camera SONY HVR-Z1E or HDR-FX1
AJA HD10A for analog (YUV) to SDI and DVS Centaurus for hw capture of HD-SDI
Encapsulation into IP using custom UltraGrid-based software, Chelsio 10Gb NICs (jumbo frames)
No compression, data stream of 1.5Gbps
Projection:
Decapsulation (including 10b to 8b color reduction, AMD64 optimized deinterlace implementation)
Video Configuration and Network: Video Configuration and Network
How (Network): How (Network) Virtual overlay network
Stream replication point(s) with software or hardware replication unit
User controllable packet reflector
10 GE NIC from Chelsio
Dual AMD64 machine with 4GB RAM (BSD clone)
Only duplication of the 1.5 Gbps stream
Optical splitter considered
Access to the L1 needed
Reflector Setup: Reflector Setup
Why: Why HD provides good compromise between sufficient details in the picture and the price of necessary equipment (cameras and projection/display systems)
Videoconferencing
Interest by physicians for educational purposes
Surgery capture
Streaming access to lectures and other edu material
High bandwidth to create challenge for network development
Problems: Problems Instability of dual AMD Opteron machines with 10GE Chelsio cards (T110/T210)
No full control over the newtork
Unexpected glitches out of our control
Still too high latency – still >500ms
Network gave 178ms between Brno and San Diego compared to the theoretical 50ms
Even uncompress video processing adds at least 100ms (both sides)
Replication units
Partners and People: Partners and People CESNET/Masaryk University Brno:
Luděk Matyska, Petr Holub, Miloš Liška, Lukáš Hejtmánek, Jiřà Denemark, Tomáš Rebok, Eva Hladká
CESNET:
Jan Radil, Stanislav Å Ãma, Jan Gruntorád
Louisiana State University:
Andrei Hutanu, Ravi Paruchuri, Brian Ropers-Huilman, Ed Seidel