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Digitally watermarking physical media

  • US 7,248,715 B2
  • Filed: 09/20/2001
  • Issued: 07/24/2007
  • Est. Priority Date: 04/06/2001
  • Status: Expired due to Term
First Claim
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1. A method comprising:

  • altering values representing a visual design to embed a plural-bit digital watermark therein; and

    applying the embedded visual design to physical media through changes to a pit-pattern carried by the physical media, wherein the changes to the pit-pattern convey the visual design including the digital watermark embedded therein.

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