Fast CELP coding based on the Barnes-Wall lattice in 16 dimensions
Claude Lamblin, J.-P. Adoul, Dominique Massaloux, S. Morissette · International Conference on Acoustics, Speech, and Signal Processing · 2003
The authors present an algebraic code-excited linear prediction (CELP) speech coder where the innovation codebook comes from the first spherical code of the Barnes-Wall lattice in 16 dimensions. Novel fast optimal algorithms for finding the best sequence in this Barnes-Wall shell innovation codebook are described. This algebraic codebook makes it possible to design a CELP coder at 9.6 kb/s with good quality and still implementable on a current digital-signal-processing chip.>