Dynamic magnetic information storage or retrieval – Record editing
Patent
1978-03-23
1979-08-07
Eddleman, Alfred H.
Dynamic magnetic information storage or retrieval
Record editing
360 73, 360 77, H04N 578, G11B 2110, G11B 1518
Patent
active
041639936
ABSTRACT:
A method and apparatus is disclosed for automatically maintaining a transducing head on the proper track and is particularly adapted for a helical scan recording and reproducing apparatus that is capable of providing special motion effects, such as slow, still and fast motion, and other effects. The apparatus is of the type which utilizes transverse positioning of the transducing head to accurately follow a track during reproducing and, at the completion of the reproduction from the track, to properly position the head in position to either reproduce the next adjacent successive track, reproduce the same track or reproduce another track so that the appropriate special motion effect is achieved. The apparatus of the present invention produces a continuous stable, noise free video picture without breakup, when the apparatus is switched from one mode to another, i.e., from a slow/still motion mode to a normal speed reproducing mode.
REFERENCES:
patent: 3663763 (1972-05-01), Trost
patent: 3699247 (1972-10-01), Mashima
patent: 3869709 (1975-03-01), Yamagishi et al.
patent: 3905043 (1975-09-01), Frank
patent: 4080636 (1978-03-01), Ravizza
patent: 4099211 (1978-07-01), Hathaway
Ampex Corporation
Clay Robert G.
Eddleman Alfred H.
Mossino Ralph L.
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