Dynamic magnetic information storage or retrieval – Record editing
Patent
1984-11-15
1987-09-01
Cardillo, Raymond F.
Dynamic magnetic information storage or retrieval
Record editing
360 142, 360 721, 360 722, 360 744, 360 70, H04N 5782, G11B 2708, G11B 2732
Patent
active
046912509
ABSTRACT:
A magnetic video reproducer outputs a plurality of pilot signals having different frequencies from a servo circuit (18) in a recording mode, to superpose the pilot signals on video signals outputted from a signal circuit (25) and record the same on video tracks provided on a magnetic tape. In shifting a mode from the recording mode to a stop mode including a pause mode, a capstan motor (19) and a reel motor (20) are reversely rotated so that a cue signal is recorded by a cue head (10) on the magnetic tape in the form of a pulse train, whereafter travelling of the magnetic tape is stopped. When the stop mode is released, a CPU (170) determines whether or not pilot signals reproduced by reverse transfer of the magnetic tape and pilot signals to be newly recorded coincide with each other in frequency and in phase to reproduce the cue signal upon a determination of coincidence, so as to re-start recording operation when the reproduced cue signal is correlated with the cue signal recorded in shifting to the stop mode, thereby to perform program search for a recording starting position.
REFERENCES:
patent: 3663766 (1972-05-01), Goto
patent: 3890639 (1975-06-01), O'Donnell et al.
patent: 4297733 (1981-10-01), Sanderson
patent: 4358797 (1982-11-01), Nishijima et al.
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Schneidemeister-Test Videorecorder, p. 9, Sep. 1982 and English translation.
Das Band-, Kopfservo-und Spurnachfuhrungs-system (DTF) des Video 2.times.4, W. Kornhass Grundig-Technische Informationen 1980.
Cardillo Raymond F.
Mitsubishi Denki & Kabushiki Kaisha
Young Wayne R.
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