The Analysis Of The Performance Of G.729D And The Implement

People pay attention to the technology of speech coding all along in wireless telecommunications field because the algorithm,rate and delay time of speech coding effect the quality of the speech.There are lots of algorithm of speech coding such as G711'PCM coding with rate of 64kbits/s,G.721'ADPCM coding with rate of 32kbits/s,G728'LD-CELP coding with rate of 16kbits/s , G.723.1'MP-MLQ/ACELP coding with rate of 6.3/5.3kbits/s,and more low rate algorithm FS-1015 LPC-10e coding with rate of 2.4kbits/s.As an excellent speech coding algorithm,G.729D speech coding attract more attentions.The algorithm for the coding of speech signals at 8kbit/s using Conjugate-Structure Algebraic-Code-Excited Linear-Prediction(CS-ACELP) with the virtue of low delay time and high quality of speech has been used in SCDMA wireless access network.In order to improve the quality of the speech special in high speed situation,SCDMA wireless access network improve the mechanism of hand over.This new mechanism of hand over need a more low rate speech coder.SCDMA wireless access netword select G.729D speech coding with the rate of 6.4kbits/s.This paper simulates the performance of G729D speech coding in the scheme of flagging the frame erasure and the frame erasure concealment. Using the MOS rule to evaluate the quality of speech.This paper present the implement of G.729D algorithm in TIMS320C5416 DSP platform including the programming,testing and optimizing.Chapter 1 is an introduction to SCDMA wireless...