发明授权
US4750033A Comb filter, chrominance and luminance signal separating circuit for
modifying the level-frequency characteristic of the luminance signal
失效
梳状滤波器，色度和亮度信号分离电路，用于修改亮度信号的电平 - 频率特性
- 专利标题： Comb filter, chrominance and luminance signal separating circuit for modifying the level-frequency characteristic of the luminance signal
- 专利标题（中）： 梳状滤波器，色度和亮度信号分离电路，用于修改亮度信号的电平 - 频率特性
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申请号： US36087申请日： 1987-04-09
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公开(公告)号： US4750033A公开(公告)日： 1988-06-07
- 发明人: Tokuya Fukuda , Isao Masuda , Takashi Honda
- 申请人： Tokuya Fukuda , Isao Masuda , Takashi Honda
- 申请人地址： JPX Tokyo
- 专利权人： Sony Corporation
- 当前专利权人： Sony Corporation
- 当前专利权人地址： JPX Tokyo
- 优先权： JPX61-89748 19860418
- 主分类号： H04N9/78
- IPC分类号： H04N9/78
摘要：
A color video signal processing circuit comprising an input terminal through which a color video signal including chrominance and luminance signals is supplied, a signal separating portion which includes both a subtraction-type comb-filter by which a first signal is derived from the color video signal and an addition-type comb-filter by which a second signal is derived from the color video signal, a level modifying portion for emphasizing the level of a first segment of the first signal residing in a predetermined frequency band lower than the frequency band of the chrominance signal and attenuating the level of a second segment of the first signal residing in the frequency band of the chrominance signal, an adder for adding an output of the level modifying portion to the second signal, a first output portion connected to the signal separating portion, and a second output portion connected to the adder. The chrominance signal separated from the color video signal is obtained through the first output portion and the luminance signal separated from the color video signal and modified to have a predetermined level-frequency characteristic is obtained through the second output portion.
公开/授权文献
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