METHOD AND APPARATUS FOR LATTICE VECTOR QUANTIZATION OF AN AUDIO SIGNAL

摘要

An apparatus comprising: a vector generator configured to generate a first vector of parameters defining at least one audio signal; a vector extender configured to extend the first vector of parameters to a second vector, where the first vector is length n and the second vector is length n, where m is greater than n; a vector transformer configured to transform the second vector; a lattice quantizer configured to lattice quantize the transformed second vector; and a reverse transformer configured to reverse transform the lattice quantized transformed second vector, such that the first n components of a reverse transformed lattice quantized transformed second vector are a lattice quantization of the first vector.