HELP! * GREY=local LOCAL HTML version of Foils prepared July 31,1995

Foil 1 Digital Video: Myths and Facts

From First Part of HPDC95 Video Server Presentation HPDC95 Pentagon City -- August 1,1995. by Marek Podgorny * See also color IMAGE
Playfield for extremists
    • Popular research approach: current hardware and software infrastructure inadequate for digital video or other continuous media. Packet networks and IP protocols not useful; need ATM AAL and radically new protocols to ensure quality of service, bandwidth provisioning, tight real-time protocols and scheduling.
    • Enthusiasts claim: Internet ready for digital video - let's go MBONE!
    • Telco's and CATV: take a disk farm or a bunch of real-time MPEG encoders and connect to hybrid fiber coax.
None of these really works today!
    • ATM technology not ready, QOS not implemented, AAL1 protocol not available. This approach seems to look for a problem to a (hardly existent) solution.
    • Internet certainly not ready for video. MBONE just a demo of IP multicast technology.
    • Telco's and CATV trials plagued by performance and scalability problems.

Northeast Parallel Architectures Center, Syracuse University, npac@npac.syr.edu

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