Vertical edge detection circuit for a television image motion adaptive progressive scanning conversion circuit

摘要

A vertical edge detection circuit for a progressive scanning conversion circuit including an input circuit for receiving an interlaced scanning television signal, a first circuit for generating an intra-field difference signal from the interlaced scanning television signal, a second circuit for generating an inter-field difference signal from the interlaced scanning television signal and a third circuit for selectively outputting a maximum value one of the intra-field and inter-field difference signals.