发明名称 |
A method for suppressing noise in image signals and an image signal processing device adopting the same |
摘要 |
<p>In an image signal processing device, a subtractor circuit 4 and an absolute value calculating circuit 6 calculate the absolute value of the difference between the image signal of the previous frame fed from a frame memory 1 and the image signal of the current frame, and a subtractor circuit 5 and an absolute value calculating circuit 7 calculate the absolute value of the difference between the image signal of the previous-previous frame fed from a frame memory 2 and the image signal of the previous frame. An adder circuit 8 adds together the thus calculated absolute values of the differences between those image signals to calculate the degree of motion, on the basis of which a gain setting circuit 9 sets a gain. The output from the subtractor circuit 4 is multiplied by this gain to generate a noise component. <IMAGE></p> |
申请公布号 |
EP1175089(A2) |
申请公布日期 |
2002.01.23 |
申请号 |
EP20010117220 |
申请日期 |
2001.07.16 |
申请人 |
SANYO ELECTRIC CO., LTD. |
发明人 |
YOSHIYAMA, MASAHIKO;MAENAKA, AKIHIRO |
分类号 |
H03M7/36;H04N5/14;H04N5/21;(IPC1-7):H04N5/21 |
主分类号 |
H03M7/36 |
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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