Optical disc recording/reproducing control

Details Optical disc recording/reproducing control Optical disc recording/reproducing control

1989-03-14

1992-04-14

Envall, Jr., Roy N.

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

369 59, 369 54, 369 4439, G11B 700

Patent

active

051054167

ABSTRACT:
An optical disc is divided into a plurality of sectors each of which includes an address section, a flag section and a data section. First sector management data are stored in the flag section, normally in the form of a flag pit. In one aspect of the invention, the first sector management data are recorded in the flag section at higher laser beam power than the power used for recording data in the data section. In another aspect of the invention, second sector management data are additionally stored in the data section in the form of a special pattern. In this case, the second sector management data are read out if no sector management data have been read from the flag section of the sector.

REFERENCES:
patent: 4428075 (1984-01-01), Hazel et al.
patent: 4885458 (1989-12-01), Horiguchi et al.
patent: 4888753 (1989-12-01), Enari et al

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