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Adaptive digital video compression system

  • US 5,225,904 A
  • Filed: 12/04/1991
  • Issued: 07/06/1993
  • Est. Priority Date: 10/05/1987
  • Status: Expired due to Term
First Claim
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1. A method of encoding a digital motion video signal having data parameters for representing images of a sequence of images formed of pixels, said signal representing a current image being encoded and at least one previous image, each image having horizontal and vertical coordinates for indicating corresponding locations within said images, comprising the steps of:

  • (a) selecting a current target region within said current image, said current target region having target region data parameters and target region coordinates;

    (b) comparing said target region data parameters with region data parameters of at least one candidate region of said previous image, said candidate region having coordinates differing from said target region coordinates;

    (c) first determining motion compensation information for said candidate region in accordance with the comparing of step (b);

    (d) second determining a sub-region within said current target region in accordance with said motion compensation information of said candidate region wherein substantially all pixels in said sub-region have substantially equal motion compensation information; and

    ,(e) dividing said current region into at least first and second sub-regions in accordance with said second determining.

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