US 11,778,170 B2
Temporal gradient calculations in bio
Hongbin Liu, Beijing (CN); Li Zhang, San Diego, CA (US); Kai Zhang, San Diego, CA (US); and Yue Wang, Beijing (CN)
Assigned to BEIJING BYTEDANCE NETWORK TECHNOLOGY CO., LTD, Beijing (CN); and BYTEDANCE INC., Los Angeles, CA (US)
Filed by Beijing Bytedance Network Technology Co., Ltd., Beijing (CN); and Bytedance Inc., Los Angeles, CA (US)
Filed on Apr. 2, 2021, as Appl. No. 17/221,617.
Application 17/221,617 is a continuation of application No. PCT/IB2019/058278, filed on Sep. 30, 2019.
Claims priority of application No. PCT/CN2018/109250 (WO), filed on Oct. 6, 2018; and application No. PCT/CN2018/109425 (WO), filed on Oct. 9, 2018.
Prior Publication US 2021/0227211 A1, Jul. 22, 2021
Int. Cl. H04N 19/105 (2014.01); H04N 19/117 (2014.01); H04N 19/119 (2014.01); H04N 19/132 (2014.01); H04N 19/176 (2014.01)
CPC H04N 19/105 (2014.11) [H04N 19/117 (2014.11); H04N 19/119 (2014.11); H04N 19/132 (2014.11); H04N 19/176 (2014.11)] 20 Claims
OG exemplary drawing
 
1. A method of video processing, comprising:
determining a reference block for a current block;
performing a refinement process for prediction of the current block, based on the reference block; and
performing a conversion between the current block and a bitstream representation of a video including the current block, based on a result of the refinement process;
wherein, the refinement process comprises:
modifying the reference block into a modified reference block, and calculating a temporal gradient based on the modified reference block, or
calculating an original temporal gradient based on the reference block, and modifying the original temporal gradient into a modified temporal gradient,
wherein the step of modifying the reference block into a modified reference block comprises:
removing a mean value for the reference block,
wherein the mean value is removed for all reference blocks.