发明授权
- 专利标题: Video signal processing circuit
- 专利标题(中): 视频信号处理电路
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申请号: US345394申请日: 1989-05-01
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公开(公告)号: US4926260A公开(公告)日: 1990-05-15
- 发明人: Peter H. Frencken , Antonius H. H. J. Nillesen , Simon J. Brand
- 申请人: Peter H. Frencken , Antonius H. H. J. Nillesen , Simon J. Brand
- 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: NLX8801415 19880602
- 主分类号: H04N5/04
- IPC分类号: H04N5/04 ; G11B20/10 ; H04N5/05 ; H04N7/01
摘要:
In order that one clock signal generator in a digital video signal processing circuit comprising a line-coupled clock signal generator and using, for example one or more field memories is sufficient for writing and reading these memories and can still process a signal from a video recorder, the control loop of the clock signal generator uses a comb filter circuit which rapidly corrects regular variations in an output signal of a phase detector of the control loop, which variations are caused by the head drum of the video recorder, without having to adapt the proportioning of a conventional loop filter circuit.