Information recording medium and method for recording and reprod

Details Information recording medium and method for recording and reprod Information recording medium and method for recording and reprod

1997-03-14

1999-03-23

Neyzari, Ali

Dynamic information storage or retrieval

Storage medium structure

Optical track structure

369 58, 369 14, G11B 724, G11B 1300

Patent

active

058869794

ABSTRACT:
An information recording medium wherein the key information is recorded by arrangement of a unit area recorded irreversibly and a unit area not recorded irreversibly to effect the truth judgment of the medium in accordance with the result of whether or not the reproduction of the key information can be effected, the information recording medium where the illegal usage of the medium is adapted to be prevented without inputting the information on to the medium truth judgment into the processing apparatus by provision of the medium firm information, a reproducing method for the same, a truth judging method for the same, and a recording/reproducing apparatus for the same.

REFERENCES:
patent: 5661703 (1997-08-01), Moribe et al.

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