| 摘要 |
A method and apparatus are provided for reducing transmission path noise within a video signal so as to provide a noise reduced picture image upon a display. The method comprises the steps of: a. extracting low level picture details and the transmission path noise from the video signal, b. recirculating a fractional component of the extracted low level picture details and the transmission path noise, c. combining the recirculated fractional component with the extracted low level picture details and the transmission path noise to cancel the extracted low level picture details and thereby separate the transmission path noise, d. subtracting the separated transmission path noise from the video signal in the absence of motion of the picture image thereof in order to noise reduce non-moving portions of the picture image of the video signal, and e. selectively coring only the moving portions of the picture image of the video signal to noise reduce those moving portions, whereby noise is reduced in non-moving portions of the picture image by signal recirculation and is reduced in moving portions of the picture image by coring.
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