Playback apparatus for correcting locking errors

Details Playback apparatus for correcting locking errors Playback apparatus for correcting locking errors

1979-02-26

1981-10-27

Faber, Alan

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Synchronizing moving-head moving-record recorders

360 75, 360 77, G11B 2710, G11B 2110

Patent

active

042977312

ABSTRACT:
In a helical scan recorder using multiple heads having gaps positioned at different aximuth angles tracking errors are detected by signal processing the normal synchronization pulses recorded with the television signal. The signal processing is accomplished by using a phase shift detection circuit and a difference circuit for subtracting signals from the phase shift circuit indicating the instantaneous phase shifts produced by the tracking errors.

REFERENCES:
patent: 3385926 (1968-05-01), Tonka
patent: 3636252 (1972-01-01), Kowal
patent: 3668492 (1972-06-01), Konishi
patent: 3705840 (1972-12-01), Kosugi
patent: 3919697 (1975-11-01), Walker
patent: 3925816 (1975-12-01), Kihara
patent: 4012771 (1977-03-01), Ishigaki
patent: 4047231 (1977-09-01), Garagnon
patent: 4056832 (1977-11-01), Boer
patent: 4120008 (1978-10-01), Metzger

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