Picture crispening by adaptive digital signal processing

The advent of digital television introduces the possibility of enhancing the appearance of pictures without some of the distortions inherent in present analog techniques. This report presents a method for sharpening the edges, or crispening, of television pictures through digital signal processing within the receiver. By increasing the rise time for edges, boundaries can be crispened without the preshoot and overshoot of peaking. Crispening is intended to be algorithmically simple so that it can be efficiently performed at the high data rates necessary for video applications.