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Encoding and decoding signals for digital watermarking

  • US 7,489,801 B2
  • Filed: 05/16/2006
  • Issued: 02/10/2009
  • Est. Priority Date: 04/25/2001
  • Status: Expired due to Term
First Claim
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1. A method comprising:

  • obtaining a media signal;

    computing a reduced-bit representation of the media signal;

    influencing a digital watermark embedding process with the reduced-bit representation of the media signal; and

    embedding a digital watermark in the media signal with the influenced digital watermark embedding process, wherein said act of embedding embeds at least a reference signal in the media signal that is used to correct or compensate for geometric distortion, wherein the reduced-bit number seeds a pseudorandom number generator used to generate the reference signal.

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