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