Dynamic magnetic information storage or retrieval – Record editing
Patent
1991-01-02
1994-07-05
Hajec, Donald
Dynamic magnetic information storage or retrieval
Record editing
360 64, 360 66, G11B 2702, G11B 1514, G11B 503
Patent
active
053272951
ABSTRACT:
A recording apparatus of the present invention includes selective guard adding means for predicting, at the time of editing, positions of adjacency of new tracks to previously recorded tracks obtained at the time of completion of new track recording, and adds, at the time of editing, guards to locations where disturbance due to residue of erasing of the same azimuth might occur in order to remove or reduce the disturbance due to residue of erasing of the same azimuth caused at the editing point. When performing reproduction from a recording medium whereon tracks recorded by heads of at least two kinds of azimuth angles are disposed alternately and a plurality of tracks are handled as one recording unit and recorded, a reproducing apparatus of the present invention is so configured that the center of each of heads located at both ends of reproducing heads may be shifted to the inside as compared with each corresponding recording track. When disturbance due to the residue of erasing of the same azimuth occurs at the editing point, therefore, more signals of tracks to be originally reproduced can be reproduced, resulting in a greater resistance to disturbance of the same azimuth.
REFERENCES:
patent: 4507691 (1985-03-01), Ishiguro et al.
patent: 4520405 (1985-05-01), Sasaki et al.
patent: 5023731 (1991-06-01), Morisaki
Design Consideration for the D-2 NTSC Composite DVTR, by Richard Brush, SMPTE Journal, Mar. 1988, pp. 182-193.
Nakayama Tadashi
Oba Yoshinobu
Sekimoto Kunio
Suesada Kunio
Togashi Sigekazu
Hajec Donald
Kim Won T. C.
Matsushita Electric - Industrial Co., Ltd.
Nippon Hoso Kyokai
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