Interval detection for automatic cueing control systems

Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the record

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360 722, 360 73, G11B 1516, G11B 1552, G11B 2722

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active

043674984

ABSTRACT:
A tape reproducing system selectively reproduces programs recorded on a recording tape wound on supply and takeup reels and drives the reels at selected fast forward and rewind speeds so that the rotation speed of said reels varies nonlinearly as a function of tape diameter wound on one of said reels. To detect inter-program pauses between programs to replay the recorded programs, the duration of each sensed pause is detected. A memory stores a set of data so each datum of the set represents tape speed as a function of the varying speed of one of the reels. The stored data are read out of the memory in response to the detected rotational speed of one reel. The detected duration is corrected in response to data readout of the memory. The corrected duration is compared with a reference value to generate a control signal for replaying the recorded programs at a playback speed.

REFERENCES:
patent: 3541271 (1970-11-01), Joslow et al.
patent: 4115821 (1978-09-01), Okada
patent: 4237497 (1980-12-01), Trevithick
patent: 4288823 (1981-09-01), Yamamoto et al.
patent: 4290090 (1981-09-01), Yamamoto et al.
IBM Technical Disclosure Bulletin, N. K. Arter et al., High Speed Search and Step Distance on a Wrapped Capstan,vol. 18, No. 12, May 1976, pp. 3924-3925.

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