US 12,126,792 B2
Displacement vector prediction method and apparatus in video encoding and decoding and device
Yingbin Wang, Shenzhen (CN); Xiaozhong Xu, State College, PA (US); and Shan Liu, San Jose, CA (US)
Assigned to TENCENT TECHNOLOGY (SHENZHEN) COMPANY LIMITED, Shenzhen (CN)
Filed by TENCENT TECHNOLOGY (SHENZHEN) COMPANY LIMITED, Shenzhen (CN)
Filed on Apr. 4, 2022, as Appl. No. 17/712,340.
Application 17/712,340 is a continuation of application No. PCT/CN2021/085697, filed on Apr. 6, 2021.
Claims priority of application No. 202010442257.8 (CN), filed on May 22, 2020.
Prior Publication US 2022/0232208 A1, Jul. 21, 2022
Int. Cl. H04N 19/105 (2014.01); H04N 19/159 (2014.01); H04N 19/176 (2014.01); H04N 19/182 (2014.01)
CPC H04N 19/105 (2014.11) [H04N 19/159 (2014.11); H04N 19/176 (2014.11); H04N 19/182 (2014.11)] 12 Claims
OG exemplary drawing
 
1. A method for displacement vector prediction in video decoding, the method comprising:
obtaining at least one candidate displacement vector, the at least one candidate displacement vector comprising displacement vectors related to at least two prediction modes, by:
constructing a history-based displacement vector prediction list, the history-based displacement vector prediction list comprising a displacement vector and auxiliary information of a historical unit,
classifying displacement vectors in the history-based displacement vector prediction list according to the auxiliary information,
generating a class-based displacement vector prediction list based on displacement vectors in classes, and
deriving the at least one candidate displacement vector from the class-based displacement vector prediction list;
deriving a predicted displacement vector of a current unit from the at least one candidate displacement vector; and
decoding the current unit based on the predicted displacement vector.