Dynamic magnetic information storage or retrieval – Record editing
Patent
1994-03-14
1996-01-23
Sniezek, Andrew L.
Dynamic magnetic information storage or retrieval
Record editing
360 64, 360 29, 360 331, 358335, H04N 578
Patent
active
054869552
ABSTRACT:
An improved helical scan type video taperecorder for reproducing a high quality video signal with no distortions, and thereby eliminating a sag distortion is provided by applying a continuous reproduced video signal prepared by inserting FM signals reproduced by a pair of rotary heads into no-signal field intervals of a FM signal reproduced by a single rotary head, only the FM signal from which is used for displaying, to a clamp circuit. Also, a skew distortion is eliminated by providing one horizontal scanning period of 1H between the last horizontal pulse in a signal field interval and the first horizontal pulse in a no-signal field interval of a reproduced video signal regardless of a type of scanning such as an interlace scanning for causing no disturbance in horizontal synchronization, and a phase distortion is eliminated by combining a pseudo-vertical synchronizing signal, which has a specific phase relationship with a video tape phase standard signal at any traveling speed of the video tape, with a reproduced video signal for causing no disturbance in vertical synchronization.
REFERENCES:
patent: 4445145 (1984-04-01), Moriya
patent: 4623940 (1986-11-01), Matsumoto et al.
patent: 4746996 (1988-05-01), Furuhata et al.
Sony Basic Video Recording Course, Booklet #7, "Luminance Processing", pp. 6-7, .COPYRGT.1979, Video Technical Information (no monthly).
Mitsubishi Denki & Kabushiki Kaisha
Sniezek Andrew L.
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