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Dynamic copy protection of optical media

  • US 6,952,479 B2
  • Filed: 11/27/2001
  • Issued: 10/04/2005
  • Est. Priority Date: 11/27/2001
  • Status: Expired due to Term
First Claim
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1. A method for preventing copying of a compact disk (CD) using an unauthorized readout device, the method comprising:

  • preparing content to be written to a session in a Program Area of the CD;

    generating control information for writing to a Program Memory Area (PMA) of the CD, which control information, when read by the unauthorized readout device, renders the unauthorized readout device incapable of properly reading the session from the CD; and

    recording the content and the control information on the CD in a Disk At Once (DAO) mode, wherein the CD is not a rewritable CD.

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