Vector Quantization of Linear Prediction Coefficient
Wai C. Chu · 2003
The chapter begins with an investigation on interframe and intraframe correlation present among the LSF vectors; it is shown that the elements of the LSF vectors have a great deal of redundancy and can be explored for more efficient quantization. Three major techniques developed for LSF VQ, namely, split VQ, MSVQ, and PVQ, are described; very often in practice, these schemes are combined together to take advantage of the strength that each individual method provides. Detailed implementations of four LSF quantizers incorporated in various speech coding standards are given.