G - Physics – 11 – B
Patent
G - Physics
11
B
352/18, 352/18.3
G11B 15/46 (2006.01) H04N 5/92 (2006.01) H04N 9/793 (2006.01) H04N 9/83 (2006.01)
Patent
CA 1056947
ABSTRACT OF THE DISCLOSURE: A color video signal recording system comprises a frequency modulator a luminance signal separated from an input color video signal, a circuit for intensifying the amplitude of a color burst signal separated from the input color video signal relatively with respect to the amplitude of a carrier chrominance signal separated from the input color video signal, automatic chroma control circuit supplied with the color burst signal thus intensified in amplitude by said intensifying circuit and with the carrier chrominance signal not relatively intensified and operating to effect level control so that, as a whole, a specific level is not exceeded, a first frequency converter for frequency converting the output signal of said automatic chroma control circuit into a band which is lower than the band of said frequency- modulated luminance signal, a circuit for mixing and multiplexing said frequency-modulated luminance signal and the resulting output signal of said first frequency converter, and transducing head for recording the resulting mixed and multiplexed signal on a recording medium. A color video signal reproducing system reproduces a signal recorded by the above described recording system. The reproducing system comprises a transudcing head for reproducing the signal recorded on said recording medium, a demodulator the frequency- modulated luminance signal separated from the reproduced signal, second frequency converter for frequency converting the color burst signal and carrier chrominance signal separated from the reproduced signal into the original frequency band - 2 - thereby to produce, a circuit for suppressing the amplitude of the color burst signal from the second frequency converter relatively with respect to the amplitude of the carrier chrominance signal from the second frequency converter, a circuit for mixing said luminance signal thus demodulated, said color burst signal of suppressed amplitude, and the carrier chrominance signal not relatively suppressed and deriving the resulting signal thus mixed as a reproduced color video signal. - 3 -
263294
Hirota Akira
Kosaka Yoshiteru
Ota Yoshihiko
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