Component coding of the NTSC color TV signal

Component coding of the NTSC color TV signal is investigated. This coding involves (1) digital demodulation of the composite signal sampled at four times the color subcarrier frequency, (2) the implementation of the compression algorithms on the subsampled component signal, and (3) digital reconstruction of the processed NTSC color signal. The comb filter and band pass filter are used for the demodulation of the luminance Y and the two chrominance signals I and Q. The DPCM which consists of a fixed two-dimensional predictor and a dual word length subjective quantizer, seems to be promising for the transmission of a digital TV channel over a 44.7 Mbit/s (T3) microwave or satellite link.