Color video signal reproducing apparatus

Details Color video signal reproducing apparatus Color video signal reproducing apparatus

1982-01-22

1984-10-16

Martin, John C.

Facsimile and static presentation processing

Facsimile

Recording apparatus

H04N 576

Patent

active

044778392

ABSTRACT:
A color video signal reproducing apparatus responds to either PAL or SECAM signals by separating a carrier chrominance signal and a luminance signal from a color video signal which is reproduced from a recording medium. The separated carrier chrominance signal is demodulated into two color difference signals. An oscillator supplies a predetermined frequency signal to the demodulators. The output frequency of the oscillator is controlled in response to a jitter component in the carrier chrominance signal. The phases of a reference signal and of a horizontal synchronizing signal are compared to produce a reference signal which is phase shifted by 180 degrees. A switching circuit operates every one horizontal scanning period in response to the reference signal. A modulating circuit responds to the reference signal and to a signal from the switching circuit by modulating them with the color difference signal. The output color video signal is produced in response thereto.

REFERENCES:
patent: 4137547 (1979-01-01), Yamamitsu
patent: 4204220 (1980-05-01), Rutishauser
patent: 4208674 (1980-06-01), Kuniyoshi et al.
patent: 4277795 (1981-07-01), Rehfeldt
patent: 4283738 (1981-08-01), Rutishauser

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