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Digital encoding of color video signals

  • US 4,141,034 A
  • Filed: 08/19/1977
  • Issued: 02/20/1979
  • Est. Priority Date: 08/19/1977
  • Status: Expired due to Term
First Claim
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1. Color video signal encoding apparatus for predicting the chrominance value representing the color information for a picture element in said signal, said picture element having a luminance value Ln, comprising:

  • (a) means for forming a first prediction of said luminance value of said picture element based upon the luminance value of a first previous picture element, and a second prediction of said luminance value based upon the luminance value of a second previous picture element;

    (b) means for computing the differences between each of said first and second predictions and said luminance value Ln ; and

    (c) means responsive to said computing means for predicting said chrominance value based upon the chrominance value of either said first or said second previous picture element, depending upon which of said luminance predictions produces a smaller difference.

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