Method and apparatus for performing motion compensated temporal filtering in video encoding
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United States of America Patent
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Apr 17, 2012
Grant Date -
Jan 15, 2009
app pub date -
Sep 18, 2008
filing date -
Aug 30, 2004
priority date (Note) -
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Abstract
A method (50) and apparatus (40) for reducing noise in a video signal calculates (53) a discrimination value of a filter based on a magnitude difference between a current frame and a prior frame of a sequence of frames and modifies (54) the current frame using the modified discrimination value. The output of the filter is calculated as follows:
wherein:
- f(i, j, k) is the current frame input to the filter;g(i, j, k) is the current frame output from the filter; andβ is the discrimination value of the filter, which is calculated as follows:
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