Optical disc recording-reproducing apparatus for determining the

Details Optical disc recording-reproducing apparatus for determining the Optical disc recording-reproducing apparatus for determining the

1991-02-04

1992-10-06

Envall, Jr., Roy N.

Dynamic information storage or retrieval

Condition indicating, monitoring, or testing

Including radiation storage or retrieval

369 58, 369 53, 360 49, G11B 700

Patent

active

051538660

ABSTRACT:
The method of determining the last sector containing recorded information or the last recorded sector, of a writer-once and read-many optical disc, comprises dividing tracks of a write-once and read-many optical disc into a plurality of sectors, where each sector has a data part for recording data and a sector ID part in which ID information for identifying the sector is recorded in advance. The ID information of a sector is attached to the data part of the sector and is recorded in the data part of the sector. The ID information reproduced from the data part of the sector is then compared with the ID information reproduced from the sector ID part of the sector, and when the ID information from the ID part and the data part coincide, the sector is determined to be the last recorded sector.

REFERENCES:
patent: 4630140 (1986-12-01), Sugimura et al.
patent: 4841498 (1989-06-01), Sugimura et al.

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