| 摘要 |
PURPOSE:To prevent the deterioration of a picture quality by making the frequency band of a chrominance signal processed, recorded and reproduced by a chrominance signal recording and processing circuit, a chrominance signal reproducing and processing circuit and a tape head system narrow and making substantially the chrominance signal a wide band. CONSTITUTION:Initially, during recording, an input carrier chrominance signal to a terminal 18 is demodulated to the chrominance signal of two color difference signals R-Y, B-Y by a chrominance signal demodulator 19. A sampling signal generated by the first sampling generating circuit 26 becomes a pulse sequence in which a phase is dislocated by 1/2 cycle every one field by a repeating frequency (fp). According to this sampling signal, the first sampling circuits 20, 20' are sampled by the chrominance signal. The chrominance signal in which a band is compressed by low-pass filters 27, 27' is modulated into the carrier chrominance signal by a carrier chrominance signal modulator 28, an unnecessary component is removed at a band-pass filter 29, the carrier chrominance signal in which the band is compressed is obtained and magnetically recorded on a tape by the tape head system 9.
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