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Method and apparatus for preventing data copying from a disk using data lengths too large for a pirate medium

  • US 5,832,088 A
  • Filed: 04/05/1996
  • Issued: 11/03/1998
  • Est. Priority Date: 08/08/1994
  • Status: Expired due to Fees
First Claim
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1. A data recording method for recording data on a disk shaped recording medium comprising the steps of:

  • (a) making recording data which satisfies a relationship expressed as M≧

    W≧

    D whereM is a maximum recordable data length defined by a standard of a first disk shaped recording medium,W is a data length of the recording data to be recorded on the first disk shaped recording medium, andD is a data length of effective data which is effective on access; and

    (b) recording the recording data made in step (a) on the first disk shaped recording medium,wherein the recording data made in step (a) has a relationship of W>

    m, where m is a maximum recordable data length of a second disk shaped recording medium that is associated with the first disk shaped recording medium.

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