H - Electricity – 04 – N
Patent
H - Electricity
04
N
H04N 5/21 (2006.01) G06T 5/00 (2006.01) H04N 7/26 (2006.01)
Patent
CA 2080086
MATA-040 ABSTRACT A method for reducing noise in a reference frame of video information by determining the mean absolute difference, MAD0, between each block in the reference frame and identically located blocks in adjacent frames. If MAD0 is < A, the block in an adjacent frame is held for averaging with the block in the reference frame, but if MAD0 for the block is > A, a search is made for a block in the adjacent frame that matches the block in the reference frame. This is labelled MADmin. If MAD0 for the block in the adjacent frame is < BMADmin, the matching block is not used in the average. If MAD0 is not < BMADmin, the matching block can be used in the average, but preferably this is not done if MADmin exceeds a value C. The values of A, B and C are determined by experience for the block size used.
Fetherstonhaugh & Co.
Matsushita Electric Industrial Co. Ltd.
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