Circuit for processing the signal delivered by a tube with crossed-band filter of a colour video camera

摘要

In a video camera with colour pick-up tube whose sensitive surface is covered by a coloured filter formed of two sets of bands sloping with respect to the vertical, the slopes and the colours of the bands are chosen so that the image information for one colour R and that for another colour B are pi /2 radians out of phase from one line to the next. The luminance path 32 of the processing circuit according to the invention includes a comb filter whose cutoff frequencies are equal to the frequencies of the spectral lines of the R and B chrominance signals. <IMAGE>