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Asymmetric watermark embedding/extraction

  • US 8,538,066 B2
  • Filed: 09/04/2012
  • Issued: 09/17/2013
  • Est. Priority Date: 04/26/2005
  • Status: Expired due to Fees
First Claim
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1. A method, comprising:

  • receiving a host content, the host content comprising embedded watermarks in a first number of embedding opportunities, wherein the first number of embedding opportunities is less than a number of all embedding opportunities within the host content; and

    extracting one or more of the embedded watermarks by evaluating no more than a first number of watermark extraction opportunities associated with the host content, whereinthe first number of watermark extraction opportunities is less than a number of all watermark extraction opportunities associated with the host content, andthe relationship between the first number of embedding opportunities, the first number of watermark extraction opportunities and the number of all watermark extraction opportunities is such that a circumvention attempt that overwrites watermarks at all extraction opportunities degrades perceptual quality of the host content below a desired perceptual quality level.

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