METHOD AND APPARATUS FOR GENERATING LATTICE VECTOR QUANTIZER CODEBOOK

摘要

A method and an apparatus for generating a lattice vector quantizer codebook are disclosed. The method includes: storing an eigenvector set that includes amplitude vectors and/or length vectors, where the amplitude vectors and/or length vectors are different from each other and correspond to a root leader of a lattice vector quantizer; storing storage addresses of the amplitude vectors and length vectors, where the amplitude vectors and length vectors correspond to the root leader and are in the eigenvector set; and generating a lattice vector quantizer codebook according to the eigenvector set and the storage addresses. In the embodiments, by making use of the codebook correlation between the lattice vector quantizers of different Numbers of Code Bits (NCBs), the method or apparatus stores only the eigenvectors which vary between the lattice vector quantizers of different NCBs, thus reducing the storage overhead of the multi-rate coding lattice vector quantizer in the process of generating the codebook.