Rate-distortion models for entropy constrained lattice quantization

In this paper we present new models for rate-distortion curves for entropy coded lattice codevectors. Exact models for both the rate and the distortion are proposed for the lattice Z_n for generalized Gaussian sources. The resulting precision with respect to experimental values is improved by 50% over previously proposed models. In addition an approximate model for general lattices is proposed for Gaussian sources, its precision being verified against experimental values and shown to improve the estimation precision from 10% to 4%.