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

Foil 7 Video Compression (4)

From First Part of HPDC95 Video Server Presentation HPDC95 Pentagon City -- August 1,1995. by Marek Podgorny * Critical Information in IMAGE
Futures:
  • MPEG-4: currently in application identification phase. Standard expected end of 1998. Intended for very narrow bandwidth (ISDN). Probably will include speech and video synthesis (compare to MIDI) and artificial intelligence technologies to build high fidelity pictures from minimal data.
  • Wavelets: superior data compression technology discussed elsewhere in this tutorial. Potentially can achieve 300+:1 video compression rates in relatively simple algorithmic way. Has potential to eliminate MPEG!
Current digital video on the Web:
  • I-frames only MPEG, data rates 500 - 700 Kbit/s, 160x120 pixels (QSIF), software playback (<15 frames/sec). Extremely poor quality, prohibitive download times for POTS users.
  • .AVI and QT movies. Even worse quality, usually larger file sizes.

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