a system for reducing bandwidth of video signals . ordinarily , an ntsc video signal has a bandwidth of 6 . 0 mhz , chrominance and luminance carriers separated by about 3 . 58 mhz , and an audio carrier located at the upper end of the 6 . 0 mhz bandwidth . the invention reduces the separation between chrominance and luminance carriers to about 2 . 15 mhz , and decreases the bandwidth to about 4 . 0 mhz . in addition , the invention moves the audio carrier outside the 4 . 0 - mhz bandwidth . the invention allows multiple channels , of 4 . 0 mhz bandwidth each , to be placed adjacent each other in a cable television spectrum , and the audio signals of the channels to be placed together , at the upper end of the spectrum , outside the range allocated to the video information . a larger number of channels is obtained than would otherwise be available , because the upper end of the spectrum is not suitable for carrying video information , but will handle audio information .