Dynamic information storage or retrieval – Information location or remote operator actuated control – Selective addressing of storage medium
Patent
1992-06-25
1994-03-08
Pascal, Robert J.
Dynamic information storage or retrieval
Information location or remote operator actuated control
Selective addressing of storage medium
369 4437, 369 47, 369 50, 369124, 235440, 235437, 235456, 235494, G11B 1722
Patent
active
052935680
ABSTRACT:
The present invention reads out track addresses written onto ID sections of a recording medium, for example, from five, tracks of the plurality of tracks read out simultaneously, to execute demodulation and error correction. In case where the addresses are multiple-written onto the ID sections, the optical spot judges the track address of the desired track on the basis of the plurality of read-out track addresses until the optical spot passes through the remaining track address. Further, in case where there is only a single one of the track addresses written on said ID sections, the track addresses are read out one by one, are demodulated and are error-corrected. The track address of the desired track is judged on the basis of the plurality of read-out track addresses, prior to the fact that the optical spot enters an information recording area.
REFERENCES:
patent: 4660191 (1987-04-01), Maeda et al.
patent: 4787076 (1988-11-01), Deguchi et al.
patent: 5023860 (1991-06-01), Ueda
patent: 5159589 (1992-10-01), Oshato
Oshiba Mitsuo
Sugawara Kazutake
Olympus Optical Co,. Ltd.
Pascal Robert J.
Ratliff R. A.
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