US 12,323,621 B2
Duplicate vertices based position compression
Jun Tian, Belle Mead, NJ (US); Chao Huang, Palo Alto, CA (US); Xiaozhong Xu, State College, PA (US); Xiang Zhang, Sunnyvale, 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 Jun. 8, 2023, as Appl. No. 18/207,610.
Claims priority of provisional application 63/394,485, filed on Aug. 2, 2022.
Prior Publication US 2024/0048763 A1, Feb. 8, 2024
Int. Cl. H04N 19/597 (2014.01); H04N 19/172 (2014.01)
CPC H04N 19/597 (2014.11) [H04N 19/172 (2014.11)] 20 Claims
OG exemplary drawing
 
1. A method of mesh processing performed in a video encoder, the method comprising:
determining whether each of a plurality of duplicate vertices is skippable in a mesh of a current frame, each of the plurality of duplicate vertices being a vertex of the mesh that is a duplicate of another corresponding vertex in the mesh, each of the plurality of duplicate vertices and its corresponding vertex having a same reference vertex in a reference frame;
excluding one or more skippable duplicate vertices of the plurality of duplicate vertices in the mesh to generate an updated mesh;
dividing vertices of the updated mesh into a plurality of vertex groups based on a predetermined constant integer, the plurality of vertex groups including a first vertex group;
determining a prediction mode of the first vertex group at least based on estimation errors of vertices in the first vertex group of the updated mesh, each of the estimation errors indicating a difference between a respective vertex in the first vertex group and a corresponding reference vertex in the reference frame; and
generating prediction information of the vertices in the first vertex group based on the determined prediction mode of the first vertex group.