【作者】 秦德兴； 覃团发； 陈琳；

【Author】 Qin Dexing,Qin Tuanfa,Chen Lin Coll. of Comp. & Elec. Info. ,Guangxi Univ. ,Nanning,Guangxi,530004,China

【机构】 广西大学计算机与电子信息学院；

【摘要】 介绍基于G.722标准的嵌入式CELP/矢量和激励线性预测(VSELP)编解码、子带码激励线性预测(SB-CELP)、多带码激励线性预测(MB-CELP)、G.729、自适应变换编码(ATC)、变换码激励(TCX)以及变换预测编码(TPC)等算法,给出基于C语言和MATLAB语言的10.4kbit/s和14.4kbit/s两种不同比特率的宽带语音编码的实现方法。仿真结果表明,主观意见评分(MOS)可达3.1～3.6,语音质量达到预定要求。更多还原

【Abstract】 Several algorithms about wideband speech coding are introduced. Base on G. 722 standard,different methods of CELP are discussed in detail,such as embedded CELP/VSELP codec、SB-CELP、MB-CELP and the algorithm of G. 729 standard. These algorithms can be used to conduct speech coding at very low bit rate. Based on SBC method,the implementation of wide speech coding by C and MATALAB simulation is obtained at the bit rates of 10. 4kbit/s and 14. 4kbit/s. The result of 3. 1-3. 6 was obtained in the hearing test.更多还原