System and method for reducing blocking artifacts and providing improved coding efficiency
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United States of America Patent
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Jun 30, 2020
Grant Date -
Apr 4, 2019
app pub date -
Oct 2, 2018
filing date -
Oct 2, 2017
priority date (Note) -
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Abstract
A system and method of reducing blocking artifacts and providing enhanced coding efficiency based, as least in part, upon evaluation of relative smoothness of signals at a coding boundary. In some embodiments, a boundary threshold difference can be established beyond which it is determined that the difference is representative of a natural or intended boundary and filtering can be applied to those boundaries having differences below the boundary threshold difference. In some further embodiments, the ramps of the signal across the boundary can be evaluated to determine whether weak or strong filtering might be appropriate. In some further embodiments, weak filtering can be performed that reduces blocking artifacts, improves coding efficiency, but does not distort ramp signals across the boundary.
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