Color signal processing apparatus for video signal recording and

Details Color signal processing apparatus for video signal recording and Color signal processing apparatus for video signal recording and

1976-12-09

1978-08-29

Richardson, Robert L.

Facsimile and static presentation processing

Static presentation processing

Attribute control

H04N 576

Patent

active

041107616

ABSTRACT:
An apparatus for recording a color television signal on a recording medium by converting a carrier color signal in the color television signal to a low frequency band signal and reproducing the color television signal by converting the recorded low frequency band carrier color signal to the original high frequency carrier color signal is disclosed. The apparatus comprises a voltage controlled oscillator having a center frequency of which is equal to a frequency which differs from a carrier wave frequency of a color signal in a standard color television signal by a carrier wave frequency of a low frequency carrier color signal, and including a crystal resonator, a frequency converter circuit for mixing an output of the voltage controlled oscillator with the low frequency carrier color signal to reproduce a carrier color signal having an original carrier frequency, and means for phase comparing a color burst signal of the reproduced carrier color signal with an output signal of a fixed frequency oscillator having an output frequency which is equal to the carrier wave frequency of the color signal of the standard color television signal to control the voltage controlled oscillator in accordance with a voltage corresponding to a phase difference. A quality factor Q of the crystal resonator of the voltage controlled oscillator is damped to a value lower than a normal value.

REFERENCES:
patent: 3918085 (1975-11-01), Numakura et al.
patent: 4007482 (1977-02-01), Amari
patent: 4007484 (1977-02-01), Amari

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