Method and architecture for temporal-spatial deblocking and deflickering with expanded frequency filtering in compressed domain
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United States of America Patent
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Jul 20, 2010
Grant Date -
May 1, 2008
app pub date -
Nov 1, 2006
filing date -
Nov 1, 2006
priority date (Note) -
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Abstract
A deblocking/deflickering filter decreases artifacts produced in a block-based image compression system, wherein a plurality of transform coefficients are produced respectively indicative of different frequencies in input signal values. The filter includes a first filter portion for deblocking filtering a first low frequency one of the transform coefficients and a second filter portion for deblocking filtering a second low frequency one of the transform coefficients, the first low frequency being different from the second low frequency. The deblocking filter passes through at least a third one of the transform coefficients having a third frequency higher than both of the first and second frequencies without deblocking filtering.
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