Optical data recording and reproducing apparatus

Details Optical data recording and reproducing apparatus Optical data recording and reproducing apparatus

1982-04-14

1985-06-11

Richardson, Robert L.

Dynamic information storage or retrieval

Information location or remote operator actuated control

Selective addressing of storage medium

369 64, 369 98, 358335, 358336, 358342, G11B 700

Patent

active

045233047

ABSTRACT:
A modulation and demodulation system for an optical data recording and reproducing apparatus is disclosed in which, in an optical disc having an optical guide track and capable of recording and reproducing optically, the guide track is divided into a plurality of data sectors and the recording or reproduction or reading is effected by data sector. The modulation system for the data field for recording the data is different from that for the identification field containing identification data such as a track address and a sector address in such a way that the identification field is reproduced at high reliability and high demodulation speed while at the same time recording data at high density in the data field.

REFERENCES:
patent: 4142209 (1979-02-01), Hedlund et al.
patent: 4370740 (1983-01-01), Hirata

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