Track-address judging method

Dynamic information storage or retrieval – Information location or remote operator actuated control – Selective addressing of storage medium

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Details

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

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