Optimized Multiple Description Scalar Quantization Based 3d Mesh Coding

In this paper, we propose a Multiple Description Coding (MDC) scheme for 3D models represented by triangular meshes. The objective of MDC is to encode a source into multiple bitstreams, called descriptions, supporting multiple quality levels of decoding. The proposed scheme is based on multiresolution geometry compression achieved by usingwavelet transform andmodified SPIHT algorithm. We obtain multiple descriptions by applying Multiple Description Scalar Quantization (MDSQ) to wavelet coefficients. Our aim is to minimize expected distortion at the decoder side. Thereforewe optimize the index assignment parameters of MDSQ for a given description loss probability and bit budget constraint. Experimental results show that the proposed algorithm achieves better expected quality compared to single description coding.