| CPC H04N 19/597 (2014.11) [H04N 19/172 (2014.11); H04N 19/46 (2014.11); H04N 19/70 (2014.11)] | 17 Claims |
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1. A method performed by at least one processor, the method comprising:
deriving a curve of a mesh sequence from a frame of a video bitstream, the curve comprising a plurality of vertices;
subdividing the curve by adding a plurality of subdivided vertices;
calculating one or more displacement vectors between each of the plurality of vertices on the curve and each of the plurality of subdivided vertices on the subdivided curve;
transforming the one or more displacement vectors to output one or more original coefficients;
determining if the current frame is coded using inter picture information or intra picture information;
in response to determining that the current frame is coded using inter picture information:
tracking the current frame with a previous frame to obtain a one-to-one correspondence between the plurality of vertices of the current frame and a plurality of vertices of the previous frame;
predicting one or more coefficients of each of the plurality of vertices in current frame based on the one-to-one correspondence;
performing entropy coding on one or more prediction residues; and
encoding the one or more prediction residues based on the one or more predicted coefficients;
in response to determining that the current frame is coded using intra picture information:
encoding one or more coefficients using arithmetic coding,
wherein separate coding contexts are used for coding prediction residues and original coefficients.
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