	US 12,278,978 B2
	Adaptive quantization step size in CCSO filtering
Yixin Du, Los Altos, CA (US); Xin Zhao, San Jose, CA (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 Apr. 19, 2024, as Appl. No. 18/641,136.
Application 18/641,136 is a continuation of application No. 18/070,315, filed on Nov. 28, 2022, granted, now 11,997,299.
Application 18/070,315 is a continuation of application No. 17/360,865, filed on Jun. 28, 2021, granted, now 11,563,964, issued on Jan. 24, 2023.
Claims priority of provisional application 63/113,125, filed on Nov. 12, 2020.
Prior Publication US 2024/0267548 A1, Aug. 8, 2024
Int. Cl. H04N 19/00 (2014.01); H04N 19/117 (2014.01); H04N 19/124 (2014.01); H04N 19/132 (2014.01); H04N 19/176 (2014.01); H04N 19/186 (2014.01); H04N 19/30 (2014.01); H04N 19/44 (2014.01); H04N 19/70 (2014.01)

CPC H04N 19/44 (2014.11) [H04N 19/117 (2014.11); H04N 19/124 (2014.11); H04N 19/132 (2014.11); H04N 19/176 (2014.11); H04N 19/186 (2014.11); H04N 19/30 (2014.11); H04N 19/70 (2014.11)]

20 Claims

1. A method of video encoding, comprising:

determining reconstructed samples of a first color component in a filter support region of a current block;

determining a quantization step size of a cross-component sample offset (CCSO) filter corresponding to the filter support region, wherein the quantization step size is separately set for each coding block, each video frame, or each video sequence; and

generating a coded video bitstream by encoding the current block and by signaling the determined quantization step size in the coded video bitstream.