| 摘要 |
PURPOSE:To attain the transmission of luminance signals and chrominance signals which have wider band and high definition than the luminance signals and chrominance signals of a NTSC specification through the use of the VTR and the CTV of the NTSC specification by providing an aperture compensating circuit and a circuit for converting the luminance signal output and the chrominance signals of the aperture compensating circuit into three primary color signals on a VTR. CONSTITUTION:A carrier chrominance signal C inputted from an input terminal 2 arrives at a color demodulation circuit 5, where it is demodulated into an I signal and a Q signal being two chrominance signals, and they reaches an YIQ/RGB conversion circuit 6, together with a Y signal outputted from the aperture compensating circuit 31. Consequently, they are converted into RGB three primary color signals, and an R signal, a G signal and a B signal are outputted to VTR output terminals 9, 10 and 11. Thus, a signal processing in the transmission of color video signals between the VTR and the CTV, namely, a series of the signal processing such as the mix of the luminance signals and the chrominance signals, frequency-separation and furthermore, RF conversion demodulation can be abbreviated, whereby the color video signals of high definition can be transmission from the VTR to the CTV without the deterioration of information on the amplitude and the phase of the transmission signal which occur due to the incompleteness of a filter and an amplifier, and addition of circuit noise.
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