Conditional motion compensated interpolation of digital motion video

  • US 4,958,226 A
  • Filed: 09/27/1989
  • Issued: 09/18/1990
  • Est. Priority Date: 09/27/1989
  • Status: Expired due to Term
First Claim
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1. A circuit for encoding applied video signals that comprise successive frames, where each frame is divided into blocks, comprising:

  • first means for encoding the blocks of some of said frames by developing for each block of such frames (a) and approximated version of said block derived from an approximated version of said block developed for a previous frame, and (b) a code which represents the deviation of said block from said approximated version of said block;

    second means for approximating the blocks of those of said frames that are to be interpolated by combining approximated versions of said blocks in selected ones of the frames that are encoded in said first means; and

    third means responsive to said second means and to said frames to be interpolated for developing a code that corresponds to those pels in blocks approximated by said second means that differ from corresponding pels in said frames to be interpolated by greater than a preselected threshold.

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