Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1991-06-11
1992-07-21
Britton, Howard W.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358154, H04N 508
Patent
active
051327945
ABSTRACT:
The horizontal synchronizing signal separation circuit extracts pulses indicative of horizontal synchronizing timing from a composite synchronizing signal which includes a horizontal synchronizing signal and a vertical synchronizing signal. When detecting the rising edge of the composite synchronizing signal, a rising edge detection circuit generates a pulse signal. A counter counts the number of the pulses in a clock signal. The output of the counter is supplied to a decoder which decodes the output of the counter and outputs timing signals. Using the timing signals, a control signal is generated to control a gate to which the output of the rising edge detection circuit is supplied. The output of the gate is used for generating a separated horizontal synchronizing signal.
REFERENCES:
patent: 4675734 (1987-06-01), Widem
Okada Hisao
Tanaka Kuniaki
Britton Howard W.
Oh Minsun
Sharp Kabushiki Kaisha
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