HELP! * GREY=local LOCAL HTML version of Foils prepared December 2,95

Foil 9 Video Compression (3)

From Video Server,Delivery and Compression Technologies SC95 Tutorial on Web Technologies -- December 4,95. by NPAC Team * Critical Information in IMAGE
MPEG flavors:
  • MPEG-1 and MPEG-2 use the same base technology but begin with different initial resolutions
    • 3 types of frames: I-frames (a.k.a. key frames) use only intraframe compression akin to JPEG; P-frames and B-frames do not contain pixel information but operational description of frame content. To decode a P-frame, decoder needs frames behind; for B-frames both look behind and ahead is needed
  • MPEG system stream: video and audio interleaved in a complex fashion

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