Chrominance frequency components in the luminance channel of a color television camera are reduced by a luminance channel notch filter having substantially linear phase characteristics and adjustable notch depth. The luminance notch is developed by subtraction of a bandpass-filtered video signal from the overall video input signal. The filter, which exhibits symmetrical transient response, improved low light level noise performance and minimizes spurious color effects due to interaction of chrominance signal components with the luminance signal.