Facsimile and static presentation processing – Static presentation processing – Attribute control
Patent
1981-06-08
1983-06-14
Martin, John C.
Facsimile and static presentation processing
Static presentation processing
Attribute control
H04N 962
Patent
active
043886370
ABSTRACT:
A device and method for monitoring a video signal formed by a train of horizontal sync pulses including odd and even numbered sync pulses and intermittent color burst signal portions located between successive horizontal sync pulses including a circuit for generating a first continuous signal in phase with the color burst signal portions, a circuit for generating a second continuous signal in phase with the odd numbered horizontal sync pulses, a demodulator circuit for demodulating the first signal with the second signal to produce a third signal, and a display device for displaying a vertical line and the third signal as a sine wave with the phase of the sine wave with respect to the vertical line being representative of the color burst signal portion to horizontal sync pulse phasing of the video signal. The horizontal sync pulses and the color burst signal portions of a second video signal may additionally be displayed as a second vertical line and a second sine wave on the display device so that a second video signal in a video system may be compared with the aforementioned video signal.
REFERENCES:
patent: 3958269 (1976-05-01), Davis
patent: 4024571 (1977-05-01), Dischert et al.
patent: 4180829 (1979-12-01), Pires
Patchett, Color Television with Particular Reference to the PAL System, pp. 152,153, Norman Price (Publishers) Ltd., London, 1968.
Lenco, Inc.
Martin John C.
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