Method and apparatus for sharpening television pictures while reducing incidental noise

摘要

A method and apparatus for shortening the transition times in a video signal while at the same time reducing incidental noise present during the non-transition portions of the video signal. An adjustable sharpness signal is provided which is modulated by a waveform derived from the video signal. This modulated signal is used to provide a boost to the sharpness signal during transition portions of the video signal. An adjustable noise reduction signal may also be provided to adjust the amplitude response of the non-transition portions of the signal.