CPC H04N 19/86 (2014.11) [H04N 19/117 (2014.11); H04N 19/157 (2014.11); H04N 19/176 (2014.11); H04N 19/436 (2014.11)] | 20 Claims |
1. A method comprising:
computing a first measure of deviation at a first four-sample boundary segment based on samples in a first sub-block of a filtering block, wherein the filtering block includes portions of four sample blocks, wherein the four sample blocks include a first sample block, and wherein the filtering block is offset from the first sample block of the four sample blocks by four samples;
using the first measure of deviation in deblocking filter decisions for the first four-sample boundary segment;
computing a second measure of deviation at a second four-sample boundary segment based on samples in a second sub-block of the filtering block; and
using the second measure of deviation in deblocking filter decisions for the second four-sample boundary segment;
wherein using the first measure of deviation in deblocking filter decisions comprises:
making a filter on/off decision jointly for all rows of the first filtering sub-block using the first measure of deviation when the first filtering sub-block is a top 8×4 filtering sub-block; and
making a filter on/off decision jointly for all columns of the first filtering sub-block based on the first measure of deviation when the first filtering sub-block is a left 4×8 filtering sub-block.
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