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Method and apparatus for producing a signature characterizing an interval of a video signal while compensating for picture edge shift

  • US 5,572,246 A
  • Filed: 06/07/1995
  • Issued: 11/05/1996
  • Est. Priority Date: 04/30/1992
  • Status: Expired due to Term
First Claim
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1. A method of producing a signature characterizing an interval of a video signal representing a picture for use in broadcast segment recognition, wherein the signature is produced based on portions of the video signal representing corresponding regions of the picture each spaced a respective predetermined amount from a nominal edge of the picture, comprising the steps of:

  • detecting a shift in the video signal corresponding with a shift in the edge of the picture from the nominal edge thereof;

    adjusting the portions of the video signal to compensate for said shift in the edge of the picture; and

    producing the signature based on the adjusted portions of the video signal.

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