Research of the Line Spectrum Frequency Quantization of the G.729 Speech Coding Algorithm
XU Ling-fan · Computer Engineering and Science · 2006
LSF(Line Spectrum Frequency)quantization exploits the predictive vector quantization(VQ) in the G.729 coding speech algorithm.Prediction VQ leads to error propagation that causes speech quality degradation when the phenomenon of speech frame loss appears in speech transmission.In this paper,a new scheme of vector quantization is described to reduce the effect of error propagation.Simulation tests indicate that the new method is better than the standard technology used in G.729.