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Optimization methods for the insertion, protection, and detection of digital watermarks in digital data

  • US 7,822,197 B2
  • Filed: 09/07/2007
  • Issued: 10/26/2010
  • Est. Priority Date: 07/02/1996
  • Status: Expired due to Fees
First Claim
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1. A system for encoding a watermark in a digital signal, comprising:

  • a generator for generating a plurality of watermark pseudo-random key bits wherein the generator is selected from the group consisting of a non-linear generator and a chaotic generator; and

    an encoder for encoding the watermark in the digital signal using the watermark pseudo-random key bits and characteristics of the digital signal.

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