Method and apparatus for correcting motion vectors
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United States of America Patent
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Aug 11, 1998
Issued Date -
N/A
app pub date -
Nov 24, 1997
filing date -
Oct 11, 1993
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Motion vectors resulting from block matching are corrected for periodic structures by taking a more reliable vector from an edge of a moving object containing the periodic structure. This is done by calculating and comparing different error combinations to identify periodic structures and replacing a current motion vector with one of an adjacent pixel block either from the block to the left or from the block above, which ever yields the smaller error in the current block, or by taking a combination (e.g., mean) of both vectors. Advantageously, artifacts such as phase reversal of information in interpolated fields due to the presence of an erroneous vector in a periodic structure are reduced and very little additional processing is required after the block matching itself.
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