Adaptive deemphasis and reemphasis of high frequencies in a video signal utilizing a recorded control signal.

摘要

A video signal recording system is disclosed which includes a circuit for generating a control signal representative of the level of the high frequency portion of a full bandwidth luminance signal. An adaptive deemphasis circuit reduces the level of the high frequency portion of the luminance signal in response to the control signal. A folding circuit folds the high frequency portion of the deemphasized luminance signal into the low frequency portion. The folded deemphasized luminance is combined with the control signal and recorded on the video tape. A video signal playback system is disclosed which includes a circuit for separating the previously recorded control signal from the previously recorded folded deemphasized luminance signal. An unfolding circuit unfolds the played back luminance signal to produce a wide bandwidth deemphasized luminance signal. An adaptive reemphasis circuit boosts the level of the high frequency portion of the unfolded luminance signal in response to the separated control signal. <IMAGE>