Dublin City University. School of Electronic Engineering
Abstract
Vector excitation coding (VXC) is a speech digitisation
technique growing in popularity. Problems associated with
VXC systems are high computational complexity and poor
reconstruction of plosives.
The Pairwise Nearest Neighbour (PNN) clustering
algorithm is proposed as an efficient method of codebook
design. It is demonstrated to preserve plosives better
than the Linde-Buzo-Gary (LBG) algorithm [34] and maintain
similar quality to LBG for other speech Classification of
the residual is then studied. This reduces codebook search
complexity and enables a shortcut in computation of the
PNN algorithm to be exploited