Digital compression method and system with improved coding efficiency

  • US 4,974,078 A
  • Filed: 11/13/1989
  • Issued: 11/27/1990
  • Est. Priority Date: 11/13/1989
  • Status: Expired due to Term
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First Claim
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1. A method of producing a coefficient scan sequence for transform coefficients of an image to be encoded, said method comprising the steps of:

  • (a) transforming reference images producing transform coefficients for the images;

    (b) determining average coefficients for the images;

    (c) ordering the average coefficients in descending order; and

    (d) storing the order of the average coefficients as the scan sequence.

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