Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the head
Patent
1991-10-28
1994-05-24
Callahan, Timothy P.
Dynamic magnetic information storage or retrieval
Automatic control of a recorder mechanism
Controlling the head
360 103, 360 351, 360 61, 360 64, 358321, G11B 2102
Patent
active
053154533
ABSTRACT:
In an apparatus for recording a video signal having interlaced fields on a recording medium sequentially using a plurality of rotating heads, a rotational phase of a rotating head relative to a vertical synchronizing signal of the video signal to be recorded is relatively switched for a period corresponding to a phase difference between a vertical synchronizing signal and a horizontal synchronizing signal of each field. It is thereby possible to obtain an excellent video signal without producing discontinuity of horizontal synchronizing signals in a reproducing operation even if a video signal of each field is recorded using any of the plurality of rotating heads having different rotational phases. At that time, objective rotational phases of a rotating cylinder provided with the plurality of rotating heads are present in the same number as the number of rotating heads. Hence, the speed of the start-up synchronizing operation is increased.
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Patent Abstracts of Japan, Publication No. JP 63-187781, Publication Date Jul. 12, 1988.
Callahan Timothy P.
Canon Kabushiki Kaisha
Cunningham Terry D.
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