Aperture correction circuit for video signals - has full adders and digital delay circuits giving correction signals

摘要

The circuit includes a first full adder (5) to which the digital video signal is fed directly and inverted and delayed. There is a second full adder (7) to which are fed the output of the first adder and the inverted and delayed video signal. There is a store (10) to which the output of the second adder (7) is fed, a third full adder (11) to which the output of the store and the inverted and delayed video signal are fed, and an overrun logic (14) to whose input the output of the third adder is fed and from whose output the aperture-coreected digital video signal is taken.