US 12,418,663 B2
Deblock filtering a chroma block coded in an intra block copy mode
Xiaozhong Xu, State College, PA (US); and Shan Liu, San Jose, CA (US)
Assigned to TENCENT AMERICA LLC, Palo Alto, CA (US)
Filed by TENCENT AMERICA LLC, Palo Alto, CA (US)
Filed on Jan. 13, 2023, as Appl. No. 18/154,306.
Application 18/154,306 is a continuation of application No. 16/394,071, filed on Apr. 25, 2019, granted, now 11,595,662.
Claims priority of provisional application 62/704,053, filed on Feb. 6, 2019.
Prior Publication US 2023/0171411 A1, Jun. 1, 2023
Int. Cl. H04N 19/174 (2014.01); H04N 19/107 (2014.01); H04N 19/159 (2014.01); H04N 19/176 (2014.01)
CPC H04N 19/159 (2014.11) [H04N 19/107 (2014.11); H04N 19/174 (2014.11); H04N 19/176 (2014.11)] 20 Claims
OG exemplary drawing
 
1. A method for video decoding in a decoder, comprising:
decoding prediction information for a chroma block in a current picture that is being decoded, the prediction information indicating that (i) an intra block copy mode is applied to the chroma block and (ii) the chroma block and a luma block that is co-located with the chroma block are coded in separate coding tree structures, the chroma block including a first chroma subblock and a second chroma subblock;
determining a first block vector of the first chroma subblock in the chroma block and a second block vector of the second chroma subblock in the chroma block;
determining, based on the determined first block vector that indicates a first reference subblock of the first chroma subblock in the chroma block and the determined second block vector that indicates a second reference subblock of the second chroma subblock in the chroma block, whether to perform deblocking filtering on a subblock boundary between the first chroma subblock and the second chroma subblock, the first reference subblock and the second reference subblock being in the current picture; and
reconstructing the chroma block based on the determination of whether to perform the deblocking filtering on the subblock boundary.