Interframe predictive coding/decoding system for varying interval between independent frames

  • US 5,103,307 A
  • Filed: 01/18/1991
  • Issued: 04/07/1992
  • Est. Priority Date: 01/20/1990
  • Status: Expired due to Term
First Claim
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1. An interframe coding system for a moving picture signal composed of serial frames which are independent frames being subjected to intraframe coding and dependent frames being subjected to interframe coding, comprising:

  • varying means for varying an interval between two of the independent frames;

    prediction means for producing each of a plurality of predictive picture signals on the basis of said two independent frames, the interval therebetween thus varied, located before and after a dependent frame to be predicted among said dependent frames and subtracting said predictive picture signals from picture signals of said dependent frames to produce predictive error picture signals, respectively; and

    intraframe coding means for coding said picture signals of said independent frames and said predictive error picture signals.

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