CPC H04N 19/167 (2014.11) [H04N 19/117 (2014.11); H04N 19/14 (2014.11); H04N 19/174 (2014.11); H04N 19/176 (2014.11); H04N 19/61 (2014.11); H04N 19/82 (2014.11); H04N 19/86 (2014.11)] | 20 Claims |
1. A method for sample adaptive offset (SAO) filtering in a video encoder, the method comprising:
deblock filtering reconstructed pixels of a coding unit (CU) of a picture using a deblocking filter;
estimating, in a SAO parameter estimator, SAO parameters for color components of the CU based on deblock-filtered reconstructed pixels and a number of columns of non-deblock-filtered reconstructed pixels of the CU, wherein the number of columns depends on a design of the deblocking filter;
performing SAO filtering on reconstructed CU pixels according to the estimated SAO parameters; and
entropy encoding SAO information for the CU in a compressed video bit stream, wherein the SAO information signals the estimated SAO parameters for the CU.
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