Magnetic recording/playback apparatus which shifts the head scan

Details Magnetic recording/playback apparatus which shifts the head scan Magnetic recording/playback apparatus which shifts the head scan

1993-08-16

1996-03-12

Psitos, Aristotelis

Dynamic magnetic information storage or retrieval

Record editing

360 7304, 360 7305, G11B 5584

Patent

active

054991447

ABSTRACT:
In a magnetic recording/playback apparatus for recording and playing back a digital video signal on a helical track of a magnetic tape using two or more rotary heads, the playback image at the time of high-speed playback is improved by setting the tape travel speed at the time of high-speed playback at an even multiple of a normal playback speed. Further a tracking phase is offset by one half the track pitch with respect to the tracking during normal speed playback. Alternatively, essential information of the information having been high-efficiency coded is recorded in the central part, and near the ends of the tracks, while high-precision information is recorded in intermediate parts intermediate between the central part and the parts near the ends. Still alternatively, the video data of one of the consecutive fields is recorded in the central part of the tracks and the video data of the other of the consecutive fields is recorded near the ends of the tracks.

REFERENCES:
patent: 4370685 (1983-01-01), Hosoi et al.
patent: 4956730 (1990-09-01), Arai et al.
patent: 5057949 (1991-10-01), Suga et al.
patent: 5301070 (1994-04-01), Tanaka
patent: 5319500 (1994-06-01), Yu
patent: 5359462 (1994-10-01), Park et al.
IEEE article entitled "Measurement of Error Incidents at High Speed Playback in Digital VTR"; 1991 papers from the 44th Convention of Kyushu Branch of Electrical and Related Institute, p. 158; Okuma, et al.

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