H - Electricity – 04 – N
Patent
H - Electricity
04
N
352/18, 350/81
H04N 5/21 (2006.01) H04N 5/14 (2006.01) H04N 5/923 (2006.01) H04N 9/64 (2006.01)
Patent
CA 1228670
ABSTRACT OF THE DISCLOSURE Disclosed is a circuit for emphasizing a video signal 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 by one horizontal scanning period is positively fed back through a feedback circuit to the input of the input video signal. An amplitude difference signal between the video signal after being fed back through a positive feedback loop and the delayed video signal is produced and added to the input video signal to provide an output video signal.
491136
Fukushima Isao
Kano Kenji
Kotani Kazunori
Miura Kuniaki
Yunde Yasufumi
Hitachi Ltd.
Kirby Eades Gale Baker
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