Multiple Description Vector Quantization with a Coarse Lattice

A multiple description lattice vector quantization technique for two descriptions was recently introduced that uses fine and coarse codebooks that are both lattices. The encoding begins with quantization to the nearest point in the fine lattice. This encoding is an inherent optimization for the decoder that receives both descriptions; performance can be improved with little increase in complexity by considering all decoders in the initial encoding step. Since the altered encoding uses only the lattice structure of the coarse codebook, the fine codebook can be optimized without a lattice constraint, improving performance further.