Intermusic detecting circuit for automatic music selecting devic

Details Intermusic detecting circuit for automatic music selecting devic Intermusic detecting circuit for automatic music selecting devic

1981-07-17

1983-02-22

Stephan, Steven L.

Dynamic information storage or retrieval

Information location or remote operator actuated control

Selective addressing of storage medium

369 33, 369217, 369226, 369233, G11B 338, G11B 1706

Patent

active

043750931

ABSTRACT:
An intersong detecting circuit for an automatic music selecting device for a record player in which intersong intervals are accurately detected even for a disc having irregular reflectivities or between discs of different reflectivities. An intersong sensor detects intersong intervals between adjacent songs on a recording disc. The output signal from the intersong sensor is sampled and held at a rate determined by a leading-in time/reproducing time time-constant switching signal. The sampled-and-held signal is compared with the output of the sensor to produce a differential signal and an intersong identification signal is produced when the differential signal exceeds a predetermined threshold value.

REFERENCES:
patent: 3937903 (1976-02-01), Osann
patent: 4079261 (1978-03-01), Mullin
patent: 4166621 (1979-09-01), Isaacson et al.
patent: 4230323 (1980-10-01), Tsuji et al.

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