Method and apparatus for detecting optical disk state

Abstract

This disclosure concerns an optical disk state detection apparatus comprising a defect detector to which a signal read from an optical disk is imparted, the defect detector detecting a defect to supply a defect detection signal; rotation synchronous pulse generator supplying a rotation synchronous pulse in synchronization with rotation of the optical disk; a memory in which the defect detection signal is stored, the defect detection signal being imparted to the memory; a write circuit performing write processing of data to the memory; a read circuit performing read processing of data from the memory; and a system controller which controls the read circuit such that the defect detection signal is written in the memory in synchronization with the rotation synchronous pulse and such that the defect detection signal is read at least one time every one rotation of the optical disk from the memory in synchronization with the rotation synchronous pulse.

Dependencies are inferred from the claim text.