US 12,470,731 B2
Predictive coding of boundary UV information for mesh compression
Xiang Zhang, Sunnyvale, CA (US); Chao Huang, Palo Alto, CA (US); Jun Tian, Palo Alto, CA (US); Xiaozhong Xu, Palo Alto, CA (US); and Shan Liu, Palo Alto, CA (US)
Assigned to TENCENT AMERICA LLC, Palo Alto, CA (US)
Filed by TENCENT AMERICA LLC, Palo Alto, CA (US)
Filed on Mar. 16, 2023, as Appl. No. 18/122,393.
Claims priority of provisional application 63/323,880, filed on Mar. 25, 2022.
Prior Publication US 2023/0308669 A1, Sep. 28, 2023
Int. Cl. H04N 19/44 (2014.01); H04N 19/20 (2014.01); H04N 19/593 (2014.01); H04N 19/70 (2014.01)
CPC H04N 19/44 (2014.11) [H04N 19/20 (2014.11); H04N 19/593 (2014.11); H04N 19/70 (2014.11)] 16 Claims
OG exemplary drawing
 
1. A method performed by at least one processor in a decoder, the method comprising:
receiving a coded video bitstream that includes a compressed two dimensional (2D) mesh corresponding to a surface of three dimensional (3D) volumetric object, the coded video bitstream including a sampling rate of a 2D region, the coded video bitstream including one or more syntax elements that specify a sign of a quantized offset and a magnitude of the quantized offset;
predicting, using the sampling rate, a sampled 2D coordinate in the 2D region from at least one previously coded sampled 2D coordinate included in the compressed 2D mesh;
deriving a prediction residual associated with the sampled 2D coordinate, wherein the predication residual is coded in accordance with a quantization process; and
reconstructing a 2D coordinate corresponding to a boundary vertex in the 2D region based on the predicted sampled 2D coordinate and the derived prediction residual.