Coding of boundary UV2XYZ index for mesh compression

A decoder comprising:

• at least one memory configured to store program code;
• and
• at least one processor configured to read the program code and operate as instructed by the program code, the program code including:
• receiving code configured to cause the at least one processor to receive a coded video bitstream that includes a compressed two dimensional (2D) mesh corresponding to a surface of three dimensional (3D) volumetric object;
• predicting code configured to cause the at least one processor to predict a current vertex included in the compressed 2D mesh based on an interpolation-based hierarchical prediction scheme that uses at least one sampled vertex included in the compressed 2D mesh;
• deriving code configured to cause the at least one processor to derive a prediction residual associated with the predicted current vertex;
• and
• reconstructing code configured to cause the at least one processor to reconstruct a boundary vertex associated with the 3D volumetric object based on the predicted current vertex and the derived prediction residual.

A non-transitory computer readable medium having instructions stored therein, which, when executed by at least one processor in a decoder, causes the at least one processor to execute:

• receiving a coded video bitstream that includes a compressed two dimensional (2D) mesh corresponding to a surface of three dimensional (3D) volumetric object;
• predicting a current vertex included in the compressed 2D mesh based on an interpolation-based hierarchical prediction scheme that uses at least one sampled vertex included in the compressed 2D mesh;
• deriving a prediction residual associated with the predicted current vertex;
• and
• reconstructing a boundary vertex associated with the 3D volumetric object based on the predicted current vertex and the derived prediction residual.