Facsimile and static presentation processing – Facsimile – Recording apparatus
Patent
1989-02-03
1991-02-19
McElheny, Jr., Donald
Facsimile and static presentation processing
Facsimile
Recording apparatus
358330, H04N 980
Patent
active
049949233
ABSTRACT:
Herein disclosed is a color video signal recording and reproducing apparatus for recording and reproducing a luminance signal as a frequency-modulated wave and a chrominance signal as a down-converted chrominance signal in and from a recording medium. The color video signal recording and reproducing apparatus comprises: a demodulator for demodulating the down-converted chrominance signal reproduced from the recording medium to generate color difference signals R-Y and B-Y in a base frequency band; a signal processor for reducing noises from those color difference signals; and a modulator for subjecting the carrier wave, which has a frequency equal to that of a color subcarrier of a color video signal, to a quadrature two-phade modulation with the color difference signals processed by the signal processor, to reproduce the chrominance signal.
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patent: 4823196 (1989-04-01), Goddard
patent: 4831463 (1989-05-01), Faroudja
Itoh Shigeyuki
Masui Hikaru
Watatani Yoshizumi
Hitachi , Ltd.
McElheny Jr. Donald
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