Video signal noise reduction system using time-varying filter coefficients.

摘要

The appts. for reducing noise in an input video signal which includes a number of video frames, has a processed frame memory for storing a noise reduced image. A motion estimator selects a target block of image components in the frame memory to be used in calculating a noise reduced video signal. A motion compensated noise reduction device calculates the noise reduced video signal by calculating a set of time-varying weighted filtering coeffts. for the target block, and generates a motion block of noise reduced image components by averaging a number of image components in a current block selected from the video signal with respective image components of the target block as weighted by the coeffts.