than chrominance edge enhancement consequently if luminance edges and chrominance edges are located on about the same spot luminance edge enhancement overrules the effect of chrominance edge enhancement so the effect of chrominance edge enhancement on positions where luminance edge enhancement is applied is negligible from these observations it is concluded that chrominance edge enhancement is only meaningful if such an edge does not go along with a luminance edge and if a chrominance edge does not go along with a luminance edge the perception of that chrominance edge can significantly be improved by introducing an artificial transition in the luminance signal at that location while it is of course not forbidden to also enhance the chrominance signal and or to sharpen any existing transients in the luminance signal in dependence on the chrominance signal substantially as known from the prior art the innovation brought by the present invention is that in the absence of a transient in the input luminance signal yin an improved color transient perception is obtained by introducing a transient in the output luminance signal yout at the location of a transient in the input chrominance signal cin without affecting the chrominance signal itself while fig1 shows just one possible waveform of an artificial peaked signal inserted in the output luminance signal other waveforms can readily be conceived by those skilled in the art fig2 shows a block diagram of an embodiment of a television receiver in accordance with the present invention the input luminance signal yin is applied to a luminance edge detector 10 which supplies a logical one.