Computational Improvement for G.729 Standard

• Main Author: 陳建吉
• Other Authors: 黃紹華
• Format: Others
• Language: zh-TW
• Published: 2002
• Online Access: http://ndltd.ncl.edu.tw/handle/79305205596461365434

碩士 === 國立臺北科技大學 === 電機工程系碩士班 === 91 === The computational improvement on G.729 standard is studied in this thesis. Three algorithms are employed and proposed to enhance the computational performance of G.729. Firstly, the “TIE+PDE” algorithm is employed to reduce the VQ-based quantization of LSP parameter. More than 13.97% of computation is reduced. Secondly, the “WD-LSP” algorithm is proposed to reduce the computation of open-loop pitch. More than 23.69% of computation is reduced. Finally, the “NCPL” algorithm is proposed to reduce the search space of fixed codebook. More than 18.38% of computation is reduced. Finally, three algorithms are simultaneously applied, which result in a total reduction of 56.04% in computation, with a reasonable good quality of synthesized speech sound.