An Even Grid Based Lattice Vector Quantization Algorithm for Mobile Audio Coding
Bo Hang, Xiaochen Wang, Ruimin Hu, Ye Ma, Zhao Xie · Journal of Multimedia · 2011
Abstract-- This paper proposed an even grid based lattice vector quantization method for audio coding. The method uses energy priority, with basic code book and the ball-type expansion, which is applicable to the low rate of the variable-rate vector quantization coding. The method uses the lattice characteristics to resolve rapid index distribution problem, as well as the compression of the basic code book. The experiment results show that the proposed method is as good as vector quantization method in ITU-T standard G729.1 in quality, with lower storage cost and computational complexity. Index Terms — even grid; lattice vector quantization; variable rate; ball-type expansion; index distribution I.