Apparatus for controlling the scanning path of a rotary transduc

Details Apparatus for controlling the scanning path of a rotary transduc Apparatus for controlling the scanning path of a rotary transduc

1978-10-20

1980-02-19

Konick, Bernard

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360 10, 360 11, 360 70, 360 76, 360 78, G11B 2110, G11B 2108, G11B 2118, H04N 578

Patent

active

041897587

ABSTRACT:
Apparatus for controlling the scanning path of a rotary transducer which is used in a signal reproducing system of the type having at least one rotary transducer which scans across a movable record medium to reproduce, during each pass of the transducer, signals which are recorded in parallel record tracks, the apparatus being particularly useful when the record medium is moved either at a faster-than-normal or slower-than-normal speed so that the transducer scans plural record tracks during each pass thereof. A control signal generator produces a periodic tracking control signal which is synchronized with the speed at which the record medium is moved, the periodic control signal having a plurality of periods during each pass of the transducer. An adjustable support is provided for the transducer, the adjustable support being responsive to the tracking control signal to displace the transducer transversely of the scanning path thereof, such that the transducer scans successive segments of predetermined record tracks during each pass thereof. In one embodiment wherein the transducer is used to scan adjacent record tracks which have been recorded with different azimuth angles, the adjustable support is controlled such that a segment of one record track is scanned, then the next adjacent record track is skipped and a segment of the next following record track is scanned and so on. Thus, only segments of those record tracks which are recorded with the same azimuth angle are scanned. This apparatus is especially useful in a search mode of, for example, a recorded video tape.

REFERENCES:
patent: 3821787 (1974-06-01), Kihara
patent: 3918085 (1975-11-01), Numakura et al.
patent: 4007482 (1977-02-01), Amari
patent: 4007484 (1977-02-01), Amari
patent: 4080636 (1978-03-01), Ravizza
patent: 4141047 (1979-02-01), Kambara et al.
patent: 4143405 (1979-03-01), Kubota

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