Circuitry for enhancing detail in color video signals

摘要

In video signal processing circuitry detail enhancement is done on each of three color channels in response to the detail information, the enhancement of the detail in each color channel being done in reliance on separated high-spatial-frequency information originally contained in one or more of the channels. The high-spatial- frequency information is separated by differentially combining a fullband video signal with that signal as filtered by a cascade connection of vertical lowpass filter and horizontal lowpass filter.