Dynamic information storage or retrieval – Control of storage or retrieval operation by a control... – Mechanism control by the control signal
Patent
1995-01-10
1997-04-01
Tran, Thang V.
Dynamic information storage or retrieval
Control of storage or retrieval operation by a control...
Mechanism control by the control signal
369 59, G11B 700
Patent
active
056173903
ABSTRACT:
The present invention realizes to increase a recording density in an optical information recording medium. The recording medium on which multi-value digital information is recorded includes a mark for forming an identification signal for identifying values of the multi-value digital signal from a reproduction signal obtained upon reproduction of the information recorded in the recording medium. An optically information recording/reproducing method according to the present invention has an information recording step and an information reproducing step. In the information recording step, a reference mark and multi-value digital information are recorded on the recording medium. The reference mark is to form an identification signal used for identifying values of the multi-value digital information from a reproduction signal optically detected from the recording medium. In the information reproducing step, the identification signal is formed from the reference mark and the values of the multi-value digital information is identified from the reproduction signal by the use of the identification signal, and thereby the multi-value digital information is reproduced.
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Iijima Katsumi
Taniwa Shigeyuki
Canon Kabushiki Kaisha
Tran Thang V.
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