基于TMS320VC5509的G.729A算法实现

作者：管必聪,吕虹 日期：2008-02-25/span> 浏览：4197 查看PDF文档

基于TMS320VC5509的G.729A算法实现

管必聪,吕虹
（安徽工程科技学院 电气工程系，安徽 芜湖 24100）

摘要：国际电信联盟（ITU T）于1996年提出了G.729A 8 kbps语音编码标准。通过分析该标准的核心算法CS ACELP的算法原理，根据数字信号处理器的特点，将ITU给出的标准C代码移植到TMS320CV5509 DSP上并对源代码中运算量较大的模块进行了代码优化，实时实现了G.729A低速率语音编解码器。经过测试，结果表明合成语音具有较高的自然度和可懂度。
关键词：语音编码；数字信号处理器；G.729A；共轭结构算术码本激励线性预测
中图分类号：TN912.3文献标识码：A文章编号：1001-4551(2008)02-0050-03

Implementation of G.729A algorithm based on TMS320VC5509
GUAN Bi-cong, LV Hong
(Department of Electrical Engineering, Anhui University of Technology and Science, Wuhu 241000, China)
Abstract: The ITU T organization standardized the G.729A for 8 kbps speech coding in 1996. Firstly, the core algorithm principle of the standard, conjugate structure algebraic code excited linear prediction （CS ACELP） was analyzed. According to the characteristics of the digital signal processor, the standard C code given by the ITU were transplanted into the DSP TMS320VC5509 and the larger operational quantity modules of the source code were optimized. Finally, the G.729A low rate speech codec were implemented real time. After the test, the results show that the synthesized speech has better naturalness and intelligibility.
Key words: speech coding; digital siginal processor (DSP); G.729A; conjugate structure algebraic code excited linear prediction (CS ACELP)
参考文献(Reference):
［1］ITU T Rec. G.729 Annex A (11/96) Reduced complexity 8 kbit/s CS ACELP speech codec[M]. ITU T Study Group 15 Transport networks, systems and equipment,1996.
 [2]SALAMI R,  LAFLAMME C, BESSETTE B. ITU T G.729 Annex A: reduced complexity 8 kb/s CS ACELP codec for digital simultaneous voice and data[J]. Communications Magazine, IEEE,1997,35(9):56-63.
 [3]洪景新，陈国伙，刘光增.基于DSP的ITU|T G.729语音编解码实现[J].厦门大学学报，2004，43（3）：335-338.
 [4]张瑞峰.基于DSP的G.729语音编解码器的设计[J].电子技术，2003,30(9):33-35.
 [5]王虹，陈锴.G.729声码器的码本搜索改进[J].电脑与信息技术，2005，13(3)：48-50.