Video signal processor for progressive scanning

Abstract

In a video signal processor for a progressive scanning system, an interlaced composite video signal, repeating at an f.sub.H line rate of approximately 16 KHz, is coupled to a comb filter. Separated luminance and chrominance signals are developed at respective output terminals of the comb filter. The chrominance signal is demodulated to develop color mixture signals. The luminance and color mixture signals are applied to a color matrix for generating a first set of R, G, B color signals, with each signal repeating at the f.sub.H line rate. A time compression circuit is coupled to the output of the color matrix for time compressing the R, G, B color signals to generate a comparable set of three time compressed and processed color signals, with each time compressed signal repeating at a double line rate of 2f.sub.H. The video signal processor is also capable of converting f.sub.H line rate, interlaced R, G, B signals, obtained from an external video source, into double line rate, non-interlaced signals. A switching arrangement is coupled to the color matrix, the external source and the time compression circuit to selectively apply to the time compression circuit, either the R, G, B signals derived from the source of the composite video signal or those directly obtained from the external source.