US 11,943,448 B2
Joint coding of motion vector difference
Liang Zhao, Sunnyvale, 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 Sep. 1, 2022, as Appl. No. 17/901,043.
Claims priority of provisional application 63/289,064, filed on Dec. 13, 2021.
Claims priority of provisional application 63/281,825, filed on Nov. 22, 2021.
Prior Publication US 2023/0164324 A1, May 25, 2023
Int. Cl. H04N 19/513 (2014.01); H04N 19/105 (2014.01); H04N 19/137 (2014.01); H04N 19/172 (2014.01); H04N 19/176 (2014.01); H04N 19/46 (2014.01)
CPC H04N 19/137 (2014.11) [H04N 19/105 (2014.11); H04N 19/172 (2014.11); H04N 19/176 (2014.11); H04N 19/46 (2014.11)] 18 Claims
OG exemplary drawing
 
1. A method for decoding a current video block of a video bitstream, comprising;
receiving, by a device comprising a memory storing instructions and a processor in communication with the memory, a coded video bitstream;
determining, by the device from the coded video bitstream, a flag for a current video block, wherein the flag indicates whether joint motion vector difference (MVD) coding is applied to the current video block; and
in response to the flag indicating that the joint MVD coding is applied to the current video block:
obtaining, by the device from the coded video bitstream, a joint MVD for the current video block,
deriving, by the device based on the joint MVD, an MVD for the current video block, and
decoding, by the device based on the joint MVD and the derived MVD, the current video block,
wherein the flag indicates whether to apply joint MVD and to derive reference frame to the current video block in a single reference mode.