H - Electricity – 04 – N
Patent
H - Electricity
04
N
352/18.31
H04N 5/78 (2006.01) H04N 9/84 (2006.01)
Patent
CA 1099813
COLOR VIDEO SIGNAL RECORDING AND/OR REPRODUCING SYSTEM ABSTRACT OF THE DISCLOSURE A color video signal recording system comprises a frequency modulator for frequency modulating the luminance signal separated from an input color video signal and producing as output a frequency-modulated luminance signal, first signal processing means for frequency converting the carrier chrominance signal separated from the input color video signal to a band lower than the band of said frequency-modulated luminance signal and also subjecting the carrier chrominance signal to signal processing to cause the phase thereof to advance successively by 90° every horizontal scanning period during a specific period and to cause the phase thereof to be lagged successively by 90° every horizontal scanning period during a successive specific period, and recording means for multiplexing said frequency-modulated luminance signal and said carrier chrominance signal thus signal processed and recording the resulting multiplexed signal successively on a plurality of tracks mutually disposed in parallel on a recording medium, said recording means recording in a manner such that a carrier chrominance signal of a phase advancing successively by 90° and a carrier chrominance signal of a phase lagged successively by 90° are in side-by-side disposition on mutual adjacent tracks. A color video signal reproducing system reproduces a signal re- corded by the above described recording system and comprises means for demodulating said frequency-modulated luminance signal separated from the reproduced signal, second signal processing means for carrying out signal processing to restore the signal processed carrier chrominance signal separated from the reproduced signal into the original frequency band by frequency conversion and also to subject the same to phase shifting processing successively by 90° every horizontal scanning period thereby to restore the same to the original carrier chrominance signal not having phase shift successively by 90°, means for delaying by one horizontal scanning period the output signal of said second signal processing means, means for mixing the output signal of said second signal processing means and the output signal of said delay means, and means for mixing the demodulated luminance signal and the output carrier chrominance signal of said mixing means thereby to produce a reproduced color video signal.
263245
Marks & Clerk
Victor Company Of Japan Ltd.
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