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Embedding supplemental data in an encoded signal, such as audio / video watermarks

  • US 6,157,330 A
  • Filed: 01/26/1998
  • Issued: 12/05/2000
  • Est. Priority Date: 01/27/1997
  • Status: Expired due to Term
First Claim
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1. A method of embedding supplemental data in an encoded signal, comprising the steps of:

  • combining an input signal with a modified signal to produce a combined signal;

    encoding the combined signal in accordance with a given encoding process to produce an encoded signal; and

    modifying the encoded signal to represent the supplemental data to produce the modified signal.

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