| 摘要 |
A color video signal recording system frequency modulates a luminance signal separated from an input color video signal. A first signal processing means converts the frequency of the carrier chrominance signal separated from the input color video signal. The conversion is to a band which is lower than the band of the frequency-modulated luminance signal. The carrier chrominance signal is processed to advance the phase thereof, successively by 90 DEG for every horizontal scanning period, during a specific period. Thereafter, the phase lags successively by 90 DEG for every horizontal scanning period during a successive specific period. For recording, the said frequency-modulated luminance signal and carrier chrominance signal are multiplexed processed, and recorded on a plurality of tracks which are mutually disposed in parallel on a recording medium. The recording is performed in such a manner that a carrier chrominance signal of a phase advancing successively by 90 DEG and a carrier chrominance signal of a phase lagging successively by 90 DEG are in side-by-side disposition on mutual adjacent tracks. A color video signal reproducing system reproduces a signal recorded by the above described recording system. The frequency-modulated luminance signal is demodulated after it is separated from the reproduced signal. A second signal processing means restores the signal which is processed carrier chrominance signal separated from the reproduced signal, into the original frequency band. The chrominance signal is phase shifted successively by 90 DEG for every horizontal scanning period, thereby to restore the original carrier chrominance signal. The output signal of the second signal processing means is delayed one horizontal scanning period. The output signal of the second signal processing means and is mixed with the output signal of the delay means. The demodulated luminance signal is mixed with the output carrier chrominance signal of the mixing means, to produce a reproduced color video signal. |
