Optical disk, and optical disk reproduction method and apparatus

Details Optical disk, and optical disk reproduction method and apparatus Optical disk, and optical disk reproduction method and apparatus

1997-07-24

1999-03-09

Hindi, Nabil

Dynamic information storage or retrieval

Information location or remote operator actuated control

Selective addressing of storage medium

3692753, 369 94, G11B 700

Patent

active

058810323

ABSTRACT:
An optical disk has a first recording layer and a second recording layers placed one over the other in such a manner that information recorded in each layer is optically readable from one side of the disk. Tracks are formed on the first and second recording layers with a plurality of sectors provided along the tracks. The tracks on the first and second layers are in a spiral pattern and arranged such that the spiral patterns on the first and second layers have opposite winding directions when viewed from the same side of the disk. The sector addresses provided to the first recording layer increasing from the most inside circumference to the most outside circumference, and the sector addresses provided to the second recording layer increase from the most outside circumference to the most inside circumference. The sector addresses on the first and second layers in approximately corresponding places in the radial direction of the disk are in complementary relationship.

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