Dynamic magnetic information storage or retrieval – Monitoring or testing the progress of recording
Patent
1989-12-29
1993-01-12
Psitos, Aristotelis
Dynamic magnetic information storage or retrieval
Monitoring or testing the progress of recording
360 371, 358338, H04N 578, H04N 595
Patent
active
051794772
ABSTRACT:
An improved helical scan type video tape recorder for reproducing a high quality video signal with no distortions, thereby a sag distortion is eliminated 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, 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: 4802032 (1989-01-01), Tatsuzawa et al.
patent: 4878131 (1989-10-01), Sakata et al.
Mitsubishi Denki Kabushiki
Psitos Aristotelis
Sheladia Varsha V.
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