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Derivation and quantization of robust non-local characteristics for blind watermarking

  • US 20050086489A1
  • Filed: 11/12/2004
  • Published: 04/21/2005
  • Est. Priority Date: 04/24/2001
  • Status: Active Grant
First Claim
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1. A method for facilitating the protection of digital signals, the method comprising obtaining a digital signal;

  • obtaining a watermark;

    using quantization index modulation (QIM), watermarking the signal with the watermark, wherein such QIM is based upon non-local characteristics of the signal.

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