Optical recording medium having access control area and...

Dynamic information storage or retrieval – Control of storage or retrieval operation by a control... – By medium defect indicative control signal

Reexamination Certificate

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C369S053170

Reexamination Certificate

active

07663990

ABSTRACT:
An information recording medium includes an access control area in which access control data (ACD) is recorded, the ACD having common information set to allow a recording/reproducing apparatus that cannot recognize a predetermined function of the information recording medium to control access to the information recording medium; and an ACD state information area in which state information regarding one of defectiveness and recordability of an ACD block, at which the ACD is recorded in the access control area, is recorded.

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