Processing of the NTSC Color Signal for One-Gun Sequential Color Displays

Circuit techniques for decoding the NTSC color signal to produce three sultaneous color signals, suitable for a three-gun display, are now well known. This paper describes simple circuit techniques for directly processing the NTSC signal at the color receiver to form a signal suitable for a one-gun sequential color display. These circuits fall broadly in two classes, namely, those used to modify the form of color subcarrier signal, and those used to modify the luminance signal. The latter class of circuits generally demodulate some of the color subcarrier signal, and correct the luminance signal in such a manner that constant-luminance operation results.