Video signal emphasis circuit.

摘要

Disclosed is a circuit for emphasizing a video signal (e,) in the vertical direction of a television picture for minimizing noise appearing during reproduction. In the circuit, a signal obtained by delaying an input video signal (e1) by one horizontal scanning period (1H) is positively fed back through a feedback circuit (2, 3) to the input of the input video signal. An amplitude difference signal (e4) between the video signal (e2) after being fed back through a positive feedback loop and the delayed video signal (e3) is produced and added (7) to the input video signal (e,) to provide an output video signal (eo).