发明名称 |
Motion detection circuit and a noise suppression circuit including the same |
摘要 |
An interframe difference signal is generated from the video signal and its one-frame delayed video signal. A filter removes a carrier color signal from the interframe difference signal to output the interframe difference luminance signal. A first motion judging circuit judges a motion in the video signal at a target pixel from the interframe difference luminance signal to output a first motion judging result in accordance with a first edge detection signal. A second motion judging circuit judges a motion in the video signal at the target pixel from a luminance signal and the carrier signal in the interframe difference signal to output a second motion judging result in accordance with a second edge detection circuit. The first and second motion judging results are combined. A majority determining circuit determines majority of the combined result from adjacent Q pixels in accordance with a third edge detection signal. A circular signal generation circuit generates a coefficient K according to the result of the majority determining circuit. The interframe difference signal is multiplied with k to generate a circulation signal. A subtractor subtracts the circulation signal from the video signal to generate an output video signal of which noise is suppressed.
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申请公布号 |
US6459734(B1) |
申请公布日期 |
2002.10.01 |
申请号 |
US20000562476 |
申请日期 |
2000.05.01 |
申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. |
发明人 |
KATO NORIYOSHI;TOYODA KEIJI;FUJITA YUKIO;SANO TOSHIYUKI;KASAHARA MISA |
分类号 |
H04N11/04;G06T7/20;H04N5/14;H04N5/21;H04N9/64;H04N9/68;(IPC1-7):H04N7/36;H04N7/50 |
主分类号 |
H04N11/04 |
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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