| 摘要 |
A preprocessor system ( 10 ) reduces random noise in video pixels by providing a memory ( 19 ) arranged to store first pixels processed during a first time period. A motion detector ( 300 ) responds to differences between the first pixels and second pixels processed during a second time period after the first time period to generate corrected motion signals. A first filter ( 100 ) generates first filtered values in response to the differences and the corrected motion signals. An impulse detector ( 244 ) generates control signals in response to detection of impulses, and an impulse reducer ( 250 ) generates second filtered pixel values in response to the first filtered values and the control signals.
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