Dynamic magnetic information storage or retrieval – General recording or reproducing – Signal switching
Patent
1989-12-22
1992-08-04
Canney, Vincent P.
Dynamic magnetic information storage or retrieval
General recording or reproducing
Signal switching
360 341, G11B 1514
Patent
active
051364379
ABSTRACT:
A video signal recording/reproducing apparatus with two groups of rotary heads which respectively include one main head and two auxiliary heads is set forth. The apparatus includes a head switching device for switching one of the two auxiliary heads into operation according to input video signals and a tape speed switching device for switching the running speed of a video tape according to the input video signals. The apparatus permits the video signal recording/reproducing of both video signals having a wide band and a narrow band. The apparatus also defines an effective tape wrap angle wherein the position of head switching is removed from a screen so that the division of images within the screen is avoidable and so that noise bars produced in the boarders of these images do not appear even in the case of special reproduction. The apparatus further permits recording of video signals on a video tape while approximately conforming a line number in the center of the main tracks to that in the center of the effective lines of the TV image. Accordingly, noise bars produced by head switching and image parts with less information amount can be removed by separating and locating them out of the upper and lower ends of the screen.
REFERENCES:
patent: 4486792 (1984-12-01), Edakubo et al.
patent: 4743977 (1988-05-01), Yoshioka et al.
patent: 4743978 (1988-05-01), Tanaka
patent: 4905104 (1990-02-01), Okamoro et al.
"A Two-Channel Recording VCR Using Orthogonal Arrangement of Heads", Y. Nagaoka et al., IEEE Transactions on Consumer Electronics, vol. 35, No. 3, Aug. 1989, pp. 202-206.
"Wideband Recording Technology for High-Definition Baseband VCRs", by Masami Itoga et al., Mitsubishi Electric Corp., Kyoto, Japan, pp. 203-209.0.
Kasuga Kyoji
Tabuchi Toshiaki
Canney Vincent P.
Sharp Kabushiki Kaisha
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