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Recording and reproducing apparatus

  • US 5,959,948 A
  • Filed: 11/13/1997
  • Issued: 09/28/1999
  • Est. Priority Date: 01/29/1992
  • Status: Expired due to Term
First Claim
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1. An apparatus for reproducing information from an optical disc having a transparent substrate and an optical recording layer, the optical recording layer extending on the transparent substrate, the optical recording layer having a first recording area storing data containing data represented by a secret code, the optical recording layer having a second recording area provided with a barcode-like pattern representing data containing information of an ID number for the optical disc, the apparatus comprising:

  • first means for optically scanning the optical recording layer of the optical disc and reading out information from the optical recording layer;

    second means for recovering the data represented by the secret code from the information read out by the first means;

    third means for recovering the information of the ID number for the optical disc from the information read out by the first means;

    fourth means for using the information of the ID number for the optical disc which is recovered by the third means as a secret code unlocking key, and for decoding the data represented by the secret code which is recovered by the second means into corresponding non-secret data in response to the secret code unlocking key; and

    fifth means for outputting the non-secret data generated by the fourth means.

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