发明授权
- 专利标题： Video signal processing circuit for noise reduction
- 专利标题（中）： 用于降噪的视频信号处理电路
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申请号： US288250申请日： 1981-07-27
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公开(公告)号： US4393396A公开(公告)日： 1983-07-12
- 发明人: Johannes G. Raven , Marinus C. W. Van Buul
- 申请人： Johannes G. Raven , Marinus C. W. Van Buul
- 申请人地址： NY New York
- 专利权人： U.S. Philips Corporation
- 当前专利权人： U.S. Philips Corporation
- 当前专利权人地址： NY New York
- 优先权： NLX8004696 19800820; NLX8100361 19810127
- 主分类号： H04N5/21
- IPC分类号： H04N5/21 ; H04N9/64 ; H04N9/535
摘要：
In a noise suppression circuit for a video signal the number of elements required can be reduced when a separation circuit (3) for a high-frequency and a low-frequency component is used and the noise suppression is effected in the low-frequency component by means of a comb filter (19) which, in order to realize a still further savings in components, may comprise a delay circuit having a delay (103, 105, 107) which is switchable between a field period plus half a line period and a field period minus half a line period. The noise suppression circuit is therefore particularly suitable for use in television receivers.
公开/授权文献
- US5479835A Reverse gear synchronizer 公开/授权日：1996-01-02