Facsimile and static presentation processing – Static presentation processing – Attribute control
Patent
1976-10-12
1978-01-10
Martin, John C.
Facsimile and static presentation processing
Static presentation processing
Attribute control
H04N 579
Patent
active
040682579
ABSTRACT:
A color video signal recording system comprises a frequency modulator. A luminance signal is separated from an input color video signal. The amplitude of a color burst signal is intensified after it is separated from the input color video signal. The intensification is with respect to the amplitude of a carrier chrominance signal separated from the input color video signal. An automatic chroma control circuit receives the intensified color burst signal and the non-intensified carrier chrominance signal to effect level control. A specific level is not exceeded. A first frequency converter converts the frequency of the output signal of the automatic chroma control circuit. The converted signal is in a band which is lower than the band of said frequency-modulated luminance signal. The frequency-modulated luminance signal and the resulting output signal of said first frequency converter are mixed and multiplexed. A transducing head records the resulting mixed and multiplexed signal on a recording medium. A color video system reproduces a signal recorded by the above described recording system.
The reproducing system comprises a transducing head for reproducing the signal recorded on the recording medium. A demodulator separates the frequency-modulated luminance signal in the reproduced signal. A second frequency converter converts the frequency of the color burst signal and carrier chrominance signal separated from the reproduced signal. The signal is returned into the original frequency band thereby suppressing the amplitude of the color burst signal from the second frequency converter, with respect to the amplitude of the carrier chrominance signal. A demodulating circuit mixes the luminance signal the color burst signal of suppressed amplitude, and the carrier chrominance signal, and derives the resulting signal thus mixed as a reproduced color video signal.
REFERENCES:
patent: 3798361 (1974-03-01), Narahara et al.
Hirota Akira
Kosaka Yoshiteru
Ota Yoshihiko
Martin John C.
Victor Company of Japan Ltd.
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