Basic HTML version of Foils prepared 7 May 98

Foil 23 Video and audio formats

From MultiMedia Databases - Collaboration, Recording and Playback ASC Dayton OH Web Training Meeting organized by CSU -- 6 May 98. by Geoffrey Fox, Marek Podgorny
1 H.263 for low-bitrate (Internet) video
  • format/encoder enhanced to accommodate random access and error tolerance by adding I-frames
  • Bandwidth: variable, but starts at 9 Kbps
  • Quality: 3-10 fps, QCIF-CIF (9 Kbps=10 fps, QCIF)
  • Current player: both ActiveMovie and Java applet
2 Audio: ADPCM, GSM, MPEG-4 CELP
  • ADPCM: done, 32 Kbps
  • GSM: codec done, integration in progress (13 Kbps)
  • MPEG-4: ongoing, slated for early July (4 - 6 Kbps)
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Page produced by wwwfoil on Thu May 7 1998