Optical disk having playback parameters recorded thereon and met

Dynamic information storage or retrieval – Storage or retrieval by simultaneous application of diverse... – Magnetic field and light beam

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369 14, G11B 1304

Patent

active

052914623

ABSTRACT:
There is disclosed an improved optically readable disk having an optically readable portion arranged on said disk so as to be readable by an optical reading unit and a magnetically readable and writable portion arranged on said disk so as to be both readable and writable by a magnetic read/write unit. The magnetically readable and writable portion of the disk preferably includes data or information recorded thereon defining a desired playback parameter and/or sequence for the data or information optically recorded on the optically readable portion of the disk. Also disclosed is an improved optical disk playback apparatus comprising a drive unit for rotatably driving an optical disk, an optical reading unit operatively arranged for reading data optically recorded on said disk as said disk is rotated and a magnetic read/write unit operatively arranged for both magnetically reading data from and magnetically writing data to a magnetically readable and writable portion of said disk as said disk is rotated. An improved method of playing back data or information optically recorded on a magneto-optical disk is also disclosed.

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