Audio recorder which can play back a temporal code irrespective

Details Audio recorder which can play back a temporal code irrespective Audio recorder which can play back a temporal code irrespective

1984-10-09

1986-04-22

Stellar, George G.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Synchronizing moving-head moving-record recorders

360 75, G11B 552

Patent

active

045846189

ABSTRACT:
An audio tape recorder comprises, over and above the conventional recording and playback heads, two playback heads incorporated in a rotary drum driven by a servo controlled motor operated by a servo control device. The playback heads are connected to a code word decoder of known kind, supplying synchronizing signals to the servo control device. When the absolute tape running speed is nil or smaller than the its nominal speed, the playback heads turn at a relative speed equal to the nominal tape running speed. When the absolute tape running speed is greater than its nominal speed, the rotary drum is stopped and the servo control device operates to provide positional servo control, as a function of the phase of the synchronizing signals supplied by the decoder.

REFERENCES:
patent: 2539837 (1951-01-01), Howell
patent: 3197575 (1965-07-01), Eckstein
patent: 3454713 (1969-07-01), Yanagimachi et al.
patent: 3596004 (1971-07-01), Prochnow
patent: 3761646 (1973-09-01), Beauviala
patent: 3806786 (1974-04-01), Inaba
patent: 4282552 (1981-08-01), Tachi et al.
IBM Technical Disclosure Bulletin, vol. 10, No. 12, May 1968, C. J. Davis et al.: "Sampling Device for Magnetically Recorded Information", pp. 1849-1850.
Journal of the Society of Motion Picture and Television Engineers, vol. 88, No. 10, Oct. 1979, G. W. Bates et al.: "Time Code Error Correction Utilizing a Microprocessor", pp. 712-715.

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