US 12,284,380 B2
Weight index inheritance
Guichun Li, San Jose, CA (US); Xiang Li, Saratoga, CA (US); 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 Jun. 10, 2022, as Appl. No. 17/837,947.
Application 17/837,947 is a continuation of application No. 16/441,879, filed on Jun. 14, 2019, granted, now 11,394,989.
Claims priority of provisional application 62/777,593, filed on Dec. 10, 2018.
Prior Publication US 2022/0312028 A1, Sep. 29, 2022
Int. Cl. H04N 19/513 (2014.01); H04N 19/176 (2014.01); H04N 19/96 (2014.01)
CPC H04N 19/513 (2014.11) [H04N 19/176 (2014.11); H04N 19/96 (2014.11)] 12 Claims
OG exemplary drawing
 
1. A method for video decoding in a decoder, the method comprising:
obtaining prediction information of a first block in a picture from a coded video bitstream;
generating reconstructed samples of the first block according to the prediction information;
adding motion information and a first bi-prediction weight index of a History-based Motion Vector Prediction (HMVP) candidate to an HMVP list, the first bi-prediction weight index indicating bi-prediction weights for the first block including a first weight applied to a first reference picture in a first list and a second weight applied to a second reference picture in a second list;
generating reconstructed samples of a second block in the picture based on a plurality of candidates that includes the HMVP candidate;
when the first block is in a Coding Tree Unit (CTU) row different from that of a current CTU in which the second block is included, the second block in the picture is decoded based on another motion information stored in a regular merge candidate or an affine merge candidate, and the second block is coded according to bi-directional prediction, setting a second bi-prediction weight index for the second block to the first bi-prediction weight index, and
wherein, when the first block is decoded according to uni-directional prediction, the first bi-prediction weight index of the HMVP candidate added to the HMVP list indicates that the first weight and the second weight are equal.