Patent
Noise reduction in frame transmitted video signals
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TLDR
In this article, the mean absolute difference between each block in the reference frame and identically located blocks in adjacent frames is calculated by making a search for a block in adjacent frame that matches the block in reference frame.Abstract:
A method for reducing noise in a reference frame of video information by determining the mean absolute difference, MAD o , between each block in the reference frame and identically located blocks in adjacent frames. If MAD o is A, a search is made for a block in the adjacent frame that matches the block in the reference frame. This is labelled MAD min . If MAD o for the block in the adjacent frame is <BMAD min , the matching block is not used in the average. If MAD o is not <BMAD min , the matching block can be used in the average, but preferably this is not done if MAD min exceeds a value C. The values of A, B and C are determined by experience for the block size used.read more
Citations
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References
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