US 12,335,522 B2
Vertex position coding in mesh 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 May 8, 2023, as Appl. No. 18/144,686.
Claims priority of provisional application 63/359,669, filed on Jul. 8, 2022.
Prior Publication US 2024/0015324 A1, Jan. 11, 2024
Int. Cl. H04N 19/597 (2014.01); H04N 19/105 (2014.01); H04N 19/17 (2014.01)
CPC H04N 19/597 (2014.11) [H04N 19/105 (2014.11); H04N 19/17 (2014.11)] 20 Claims
OG exemplary drawing
 
1. A method of mesh processing performed in a video encoder, the method comprising:
determining a plurality of candidate predictions of a current vertex, the current vertex being included in a plurality of vertices of a mesh, the plurality of candidate predictions being determined based on a plurality of triangles in the mesh, each of the plurality of triangles corresponding to a respective candidate prediction;
determining a prediction of the current vertex based on the plurality of candidate predictions, the prediction being identified by a prediction index that is predetermined based on a number of the plurality of candidate predictions of the current vertex being equal to or larger than a threshold value; and
encoding prediction information of the current vertex based on the determined prediction, the prediction information including the prediction index identifying the prediction of the current vertex, wherein:
the prediction index is encoded as a first prediction index when the number of the plurality of candidate predictions of the current vertex is equal to the threshold value, the first prediction index indicating the prediction of the current vertex is associated with a first one of a plurality of candidate predictors in a prediction list, and
the prediction index is encoded as a second prediction index when the number of the plurality of candidate predictions of the current vertex is larger than the threshold value, the second prediction index indicating the prediction of the current vertex is associated with a second one of the plurality of candidate predictors in the prediction list.