THE EFFECT OF WEIGHT FACTOR ON THE PERFORMANCE OF G.729A SPEECH CODER

G.729A (CS-ACELP Annex A) is a high quality low bandwidth codec at 8 kbit/s with low complexity. G.729A is a bit stream interoperable with G.729; i.e., speech coded with G.729A can be decoded with G.729, and vice versa. Several algorithmic changes have been introduced into G.729 which resulted in 50% drop in its complexity. The Aim of this paper is to study the effect of weight factor on the performance of G.729A coder synthesized speech. This coder is implemented in MATLAB with many different values of weight factor. The effect of weight factor on the recovered speech quality has been investigated and studied. Objective analysis on weighted speech has been carried out in order to observe its overall performance. The performance measures prove that at certain values of weight factor, the speech quality is better than at the value listed in the standard.