Optical disc, device for checking optical disc, and device for r

Details Optical disc, device for checking optical disc, and device for r Optical disc, device for checking optical disc, and device for r

1995-09-11

1996-11-05

Epps, Georgia Y.

Dynamic information storage or retrieval

Storage medium structure

Optical track structure

369 58, 369 54, 369 47, 369 4426, G11B 700

Patent

active

055725074

ABSTRACT:
An optical disc has a sequence of pits which extends along a track. The pit sequence represents a recorded signal divided into data blocks. The pit sequence includes a normal pit train and an unusual pit train. The normal pit train is symmetrical with respect to a center of the track. The unusual pit train is different from the normal pit train in at least one of shape and pit arrangement. The unusual pit train is at a position having a predetermined relation with the data blocks.

REFERENCES:
patent: 5043965 (1991-08-01), Iida et al.
patent: 5062091 (1991-10-01), Maeda et al.
patent: 5321675 (1994-06-01), Ito et al.
TC9236F (1991), pp. (741-744).
AN8803SB (Dec. 3, 1990).
International Standard, "Information Processing-Volume and File Structure of CD.sub.-- ROM for Information Interchange." ISO 9660: 1988(E).

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