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Digital compact disc player security system reproducing method and apparatus

  • US 6,122,739 A
  • Filed: 11/13/1995
  • Issued: 09/19/2000
  • Est. Priority Date: 11/18/1994
  • Status: Expired due to Term
First Claim
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1. A digital storage medium comprising:

  • a plurality of data bits stored on a side of the digital storage medium forming a track of data bits; and

    a security code stored in the track which is defined as modulation of a positional offset of a physical location of the data bits from a nominal track location, wherein the security code is repeatedly stored;

    wherein the digital storage medium is a digital optical disc and the security code is stored in a TOC area of the digital optical disc.

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