Complete Multiple Description Mesh-Based Video Coding Scheme and Its Performance

This paper proposes a multiple description(MD) mesh-based motion coding method, which generates two descriptionsfor mesh-based motion by subsampling the nodes of a right-angledtriangular mesh and dividing them into two groups. Motion vectorsassociated with the mesh nodes in each group are transmitted overdistinct channels. With the nodes in each group, two other regulartriangular meshes besides the original one can be constructed, andthree different prediction images can be reconstructed according todescriptions available. The proposed MD mesh-based motion coding methodis then combined with the pairwise correlating transform (PCT), and acomplete MD video coding scheme is proposed. Further measures are takento reduce the mismatch between the encoder and decoder that occurs whenonly one description is received and the decoder reconstruction isdifferent from the encoder. The performance of the proposed scheme isevaluated using computer simulations, and the results show, compared toReibman's MD transform coding (MDTC) method, the proposed schemeachieves better redundancy rate distortion (RRD) performance. In packetloss scenario, the proposed scheme outperforms the MDTC method.