Video disk reproducing device having improved motor speed contro

Details Video disk reproducing device having improved motor speed contro Video disk reproducing device having improved motor speed contro

1988-07-06

1989-08-08

Psitos, Aristotelis M.

Dynamic magnetic information storage or retrieval

Record editing

360 7303, 358322, 358342, 358343, 369 50, H04N 591, G11B 1700

Patent

active

048558478

ABSTRACT:
A data reproducing device with which, in reproducing a digitized audio signal, the speed of movement of a data detecting point of a pickup relative to the recording medium is controlled with high accuracy. A digitally modulated audio signal recorded in the form of a pulse train is extracted from the output of the pickup, and a clock signal is extracted from the former signal indicative of the presence of audio data. A changeover instruction signal is produced in response to the pulse train thus demodulated. A signal selecting switch circuit selectively outputs in response to the changeover instruction signal one of the extracted clock signal and a synchronizing signal contained in the reproduced video signal as a signal for controlling the speed of movement of the pickup relative to the recording medium.

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