【摘要】 介绍基于 G.72 2标准的嵌入式 CEL P/矢量和激励线性预测 (VSEL P)编解码、子带码激励线性预测(SB- CEL P)、多带码激励线性预测 (MB- CEL P)、G.72 9、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 MATL AB语言的 10 .4 kbit/ s和 14 .4 kbit/ 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