US 11,856,228 B2
Deblocking filter for sub-partition boundaries caused by intra sub-partition coding tool
Biao Wang, Munich (DE); Anand Meher Kotra, Munich (DE); Semih Esenlik, Munich (DE); Han Gao, Munich (DE); and Jianle Chen, San Diego, CA (US)
Assigned to HUAWEI TECHNOLOGIES CO., LTD., Shenzhen (CN)
Filed by HUAWEI TECHNOLOGIES CO., LTD., Guangdong (CN)
Filed on Aug. 11, 2021, as Appl. No. 17/399,203.
Application 17/399,203 is a continuation of application No. 16/994,277, filed on Aug. 14, 2020, granted, now 11,122,299.
Application 16/994,277 is a continuation of application No. PCT/CN2020/071272, filed on Jan. 10, 2020.
Claims priority of provisional application 62/791,003, filed on Jan. 10, 2019.
Prior Publication US 2021/0377570 A1, Dec. 2, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. H04N 19/66 (2014.01); H04N 19/80 (2014.01); H04N 19/176 (2014.01); H04N 19/593 (2014.01)
CPC H04N 19/66 (2014.11) [H04N 19/176 (2014.11); H04N 19/593 (2014.11); H04N 19/80 (2014.11)] 23 Claims
OG exemplary drawing
 
10. A method for deblocking a sub-partitions boundary within a coding block during an image encoding or image decoding process, wherein the coding block is coded in an intra prediction mode and the coding block is partitioned into sub-partitions by an intra sub-partition (ISP) tool and the sub-partitions including a first sub-partition and a second sub-partition, and the first sub-partition is horizontally adjacent to a second sub-partition, the method comprising:
determining a first maximum filter length to be 1 for the first sub-partition, when a width of the first sub-partition is 4 samples or a width of the second sub-partition is 4 samples; and
modifying, based on the first maximum filter length, a value of up to one sample of the first sub-partition, wherein the up to one sample is obtained from a row of the first sub-partition that is perpendicular to the sub-partitions boundary between the first sub-partition and the second sub-partition and the up to one sample is adjacent to the sub-partitions boundary between the first sub-partition and the second sub-partition,
wherein the sub-partitions boundary between the first sub-partition and the second sub-partition is caused by the intra sub-partition tool, and the sub-partitions boundary between the first sub-partition and the second sub-partition is an internal boundary.