Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1990-09-07
1992-05-26
Groody, James J.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358148, H04N 506
Patent
active
051172909
ABSTRACT:
Circuit arrangement in a picture display device, including a video signal processing circuit and a line synchronizing circuit with a clock signal the frequency of which is coupled to the line frequency. To eliminate a ripple, which is present in the control signal for the line generator during the occurrence of the line synchronizing pulses and which causes a disturbance when reading the video information by means of a clock signal, a compensation signal is generated which has the same frequency as the signal from the generator and which is applied to the control input of the generator, the signal at the control input being substantially constant throughout the line period in the synchronous state of the line synchronizing circuit.
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Goodman Edward W.
Groody James J.
Murrell Jeffrey S.
U.S. Philips Corporation
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