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High Definition Video Real Time Multipoint Distribution. Lud e k Matyska CESNET & Masaryk University Brno Czech Republic. What.

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high definition video real time multipoint distribution

High Definition Video Real Time Multipoint Distribution

Ludek Matyska

CESNET & Masaryk University Brno

Czech Republic

slide2
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, San Diego, CA

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

iGrid2005, San Diego, CA

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)

iGrid2005, San Diego, CA

video configuration and network
Video Configuration and Network

iGrid2005, San Diego, CA

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

iGrid2005, San Diego, CA

reflector setup
Reflector Setup

iGrid2005, San Diego, CA

slide8
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

iGrid2005, San Diego, CA

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

iGrid2005, San Diego, CA

partners and people
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

iGrid2005, San Diego, CA