View
213
Download
0
Category
Preview:
Citation preview
High Definition Video Real Time Multipoint Distribution
Ludek MatyskaCESNET & Masaryk University BrnoCzech Republic
September 28, 2005 iGrid2005, San Diego, CA
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
September 28, 2005 iGrid2005, San Diego, CA
iGrid2005 Demo Setup
• HD Multipoint Videoconference (CZ101)• Three participating sites:
– Masaryk University Brno, Czech Republic– Louisiana State University, Baton Rouge, Louisiana– UCSD, San Diego
September 28, 2005 iGrid2005, San Diego, CA
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)
September 28, 2005 iGrid2005, San Diego, CA
Video Configuration and Network
September 28, 2005 iGrid2005, San Diego, CA
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
September 28, 2005 iGrid2005, San Diego, CA
Reflector Setup
September 28, 2005 iGrid2005, San Diego, CA
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
September 28, 2005 iGrid2005, San Diego, CA
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
September 28, 2005 iGrid2005, San Diego, CA
Partners and People
CESNET/Masaryk University Brno:Luděk Matyska, Petr Holub, Miloš Liška, Lukáš
Hejtmánek, Jiří Denemark, Tomáš Rebok, Eva Hladká
CESNET:Jan Radil, Stanislav Šíma, Jan Gruntorád
Louisiana State University:Andrei Hutanu, Ravi Paruchuri, Brian Ropers-
Huilman, Ed Seidel
Recommended