Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1990-10-22
1991-09-10
Kostak, Victor R.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358148, 315387, H04N 504
Patent
active
050478559
ABSTRACT:
A picture pick-up or display device for picking up a scene or for displaying a scene image includes a line deflection circuit for generating a symmetrical line deflection current, a video signal processing circuit having a memory for storing video information, and a clock oscillator for generating a read clock signal for the memory. The oscillator is controlled in such a way that a first and a second signal occur substantially simultaneously at measuring instants, the first signal originating from the line deflection circuit and the second signal originating from a signal generator. The first signal is applied by a maximum value detector substantially at the instant when the line deflection current has a maximum value. The measuring instants are substantially located at the instants when a counter counting the clock signal pulses supplies a count during the line blanking interval.
REFERENCES:
patent: 4510527 (1985-04-01), den Hollander
patent: 4543614 (1988-09-01), Chen
patent: 4667232 (1987-05-01), Long
patent: 4672449 (1987-06-01), Kraus et al.
Goodman Edward W.
Kostak Victor R.
U.S. Philips Corporation
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