In this paper, we propose a new split vector quantization (SVQ) for encoding the PARCOR coefficients. The new scheme partitions the lattice filter into several stages and the PARCOR coefficients in each stage are calculated based on the principle of LPC analysis. Each stage operates on the residual of the previous stage as similar to the multi-stage structure. The structure of the new split VQ scheme also lends itself to easily incorporate a weighting mechanism so that the masking property of the human sound reception is considered during quantization. Simulation results show that the new scheme achieves lower quantization distortion than other split VQ schemes.

Keywords: Split vector quantization, Weighted lattice