Dynamic magnetic information storage or retrieval – Monitoring or testing the progress of recording
Patent
1976-08-16
1978-11-21
Cardillo, Jr., Raymond F.
Dynamic magnetic information storage or retrieval
Monitoring or testing the progress of recording
360 36, H04N 5795
Patent
active
041268865
ABSTRACT:
A jitter correcting system is provided in a video reproducing apparatus for reproducing a composite video signal of a given standard television system to be connected to a monitor television receiver including an automatic frequency control for a horizontal oscillator, comprising a circuit for phase modulating the horizontal synchronizing signal of the reproduced composite video signal, by the amount associated with the phase difference between the composite video signal to be applied to the picture tube of the monitor television receiver and the output signal of the automatic frequency control of the monitor television receiver, for providing a modified composite video signal a phase modulated horizontal synchronizing signal. The system further comprises a circuit for generating a pseudo video composite signal including vertical and horizontal synchronizing signals and a marking signal in the video signal phase region wherein the horizontal synchronizing signal has been phase shifted as compared with that of the standard television system of the video reproducing apparatus for applying the said pseudo composite video signal through the jitter correcting system to the monitor television receiver, whereby the phase modulating circuit can be adjusted while observing the marking indication caused by the marking signal appearing on the screen of the picture tube.
REFERENCES:
patent: 3575666 (1971-04-01), Fischman
patent: 3681522 (1972-08-01), Tanabe
patent: 3758710 (1973-09-01), Crosno
patent: 3758711 (1973-09-01), Crosno
patent: 3761605 (1973-09-01), Makara et al.
patent: 3846584 (1974-11-01), Itoh et al.
Hashimoto Hiroyoshi
Takahara Ichiro
Cardillo, Jr. Raymond F.
Sanyo Electric Co,. Ltd.
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