Apparatus for adaptive inter-frame predictive encoding of video signal

  • US RE35,158 E
  • Filed: 12/28/1992
  • Issued: 02/20/1996
  • Est. Priority Date: 04/27/1989
  • Status: Expired due to Term
First Claim
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1. An adaptive encoding apparatus for encoding an input video signal, said video signal comprising a sequence of frames each comprising successive pixel data the apparatus comprising:

  • encoder means for encoding successive blocks of a frame of said video signal, each of said blocks comprising a fixed-size array of said pixel data values;

    means for selecting one in every N of said frames to be transferred directly to said encoder means as a reference frame, to be encoded by intra-frame encoding, where N is a fixed integer of value greater than one; and

    adaptive prediction means for executing adaptive prediction processing, as a dependent frame, of each frame occurring between a preceding one and a succeeding one of said reference frames in said frame sequence, by deriving for the data values of each block of a dependent frame respective prediction error values based upon an optimum prediction signal selected from a plurality of prediction signals derived using a plurality of combinations of said preceding and succeeding reference frames.

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