Video signal processing apparatus

Details Video signal processing apparatus Video signal processing apparatus

1990-12-07

1992-06-16

Shepperd, John W.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 17, 358310, H04N 983

Patent

active

051228696

ABSTRACT:
A video signal processing apparatus has a phase-locked loop which includes a quartz resonator, a voltage-controlled oscillator connected to the quartz resonator and oscillating at an oscillation frequency whose fundamental value is determined by the quartz resonator, and a horizontal sync signal lock circuit comparing a phase of a horizontal sync signal and a phase of an output signal from the voltage-controlled oscillator and controlling the oscillation frequency of the voltage-controlled oscillator in response to a difference between the phases of the horizontal sync signal and the output signal from the voltage-controlled oscillator. The video signal processing apparatus also has a device for modulating a video signal by use of the output signal from the voltage-controlled oscillator.

REFERENCES:
patent: 4607292 (1986-08-01), Kojima et al.
patent: 4884151 (1989-11-01), Ohtsu et al.

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