发明名称 |
Noise reducing system for video signal. |
摘要 |
<p>A noise reducing system for video signal, comprises a vertical pre-emphasis circuit (13) supplied with an input video signal which is to be transmitted, for pre-emphasizing the input video signal and transmitting a pre-emphasized video signal to a transmitting system, and a vertical de-emphasis circuit (19) supplied with a pre-emphasized video signal which is pre-emphasized by the vertical pre-emphasis circuit and is transmitted through the transmitting system (14-18), for de-emphasizing the pre-emphasized video signal. The vertical pre-emphasis circuit has a non-linear pre-emphasis characteristic for relatively emphasizing a high-frequency component of the input video signal in a vertical spatial frequency of a picture compared to a low-frequency component of the input video signal, with the degree of emphasis being reduced as the level of the input video signal increases. The vertical de-emphasis circuit has a non-linear de-emphasis characteristic for relatively attenuating a high.frequency component of the pre-emphasized video signal in a vertical spatial frequency of the picture compared to a low-frequency component of the pre-emphasized video signal, with the degree of attentuation being reduced as the level of the pre-emphasized video signal increases.</p> |
申请公布号 |
EP0133048(A2) |
申请公布日期 |
1985.02.13 |
申请号 |
EP19840305185 |
申请日期 |
1984.07.30 |
申请人 |
VICTOR COMPANY OF JAPAN, LIMITED |
发明人 |
HIROTA, AKIRA;TSUSHIMA, TAKUYA |
分类号 |
G11B20/06;H04N5/922;H04N5/923;(IPC1-7):H04N5/92 |
主分类号 |
G11B20/06 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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