Framework of inter-frame trisoup geometry coding. It goes through a series of conditional branches based on the inter-frame enabling, the position information, the prediction quality of uncompensated vertices and the presence of co-located vertices (i.e., isInterGood, TriSoupVerticesPred, nBadPredRef and colocatedV ertex). Each branch maps different contexts to corresponding coder group for entropy coding. Specially, in the proposed improvements, nBadPredRef and colocatedV ertex are no longer contained in Inter context 1 and Inter context 2, instead of guiding the mapping of contexts to the corresponding Coder Groups.