发明名称 |
Method and apparatus for measuring noise in video signals |
摘要 |
A method of measuring noise in a television signal includes the steps of storing an estimated noise value N. The activity values A of blocks of pixels are measured and periodically compared with the estimated noise value N. A first correction value Cv1 is added to the estimated value when A>N and a second correction value Cv2 is subtracted from the noise value N when A</=N. The second correction value Cv2 is substantially greater than the first correction value Cv1.
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申请公布号 |
US5387946(A) |
申请公布日期 |
1995.02.07 |
申请号 |
US19930035024 |
申请日期 |
1993.03.22 |
申请人 |
THOMSON CONSUMER ELECTRONICS S.A. |
发明人 |
KNEE, MICHAEL |
分类号 |
G01R29/26;H04N17/00;(IPC1-7):H04N5/213 |
主分类号 |
G01R29/26 |
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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