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Optical disk using land and groove tracks

  • US 5,648,954 A
  • Filed: 06/08/1994
  • Issued: 07/15/1997
  • Est. Priority Date: 06/08/1993
  • Status: Expired due to Term
First Claim
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1. An information recording/reproduction method by which information is recorded onto and/or reproduced from an optical disk comprising a first track in which information is recorded into and/or reproduced from a groove, and a second track in which information is recorded onto and/or reproduced from a land sandwiched by said first track, said first and second tracks being formed on the same recording plane, whereinone defect list area in which a defect list including a defective sector address of a defective sector and an alternate sector address is to be recorded is formed in one of said first and second tracks, and, when a defective sector is detected in said first or second track, a defect-alternation process is conducted while additionally recording said defect list into said defect list area.

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