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公开(公告)号:US4647960A
公开(公告)日:1987-03-03
申请号:US777288
申请日:1985-09-18
申请人: Kuniaki Miura , Yasufumi Yunde , Kazunori Kotani , Isao Fukushima , Kenji Kano
发明人: Kuniaki Miura , Yasufumi Yunde , Kazunori Kotani , Isao Fukushima , Kenji Kano
摘要: 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.
摘要翻译: 公开了一种用于在电视图像的垂直方向上强调视频信号以减少再现期间出现噪声的电路。 在该电路中,通过将输入视频信号延迟一个水平扫描周期而获得的信号通过反馈电路被反馈到输入视频信号的输入。 产生通过正反馈回路反馈的视频信号与延迟视频信号之间的振幅差信号,并将其相加到输入视频信号以提供输出视频信号。