AMR-NB与AMR-WB语音编码标准技术的对比研究
首发时间:2009-11-16
摘要:在深入分析和研究AMR-NB 与AMR-WB原理的基础上,介绍了AMR-NB 与AMR-WB两种语音编码标准的特点和算法,以及简单概括了两者的来源和速率模式,就其线性预测分析和语音质量性能方面进行了比较,在线性预测分析方面主要对两种算法的帧长、LP 次数、加窗和谱包络的不同进行了说明,并且对于高频带增益做了对比;接着给出了两种编码标准的语音质量和计算复杂度得性能测试结果,通过仿真结果从主观和客观两个方面做出了的比较;最后对于AMR-NB 与AMR-WB的应用进行了简单的陈述。
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Contrast Study on Speech Coding Techniques Between AMR-NB and AMR-WB Standards
Abstract:Analysising and researching principle of AMR-NB and AMR-WB depth,The characteristics and t algorithms of AMR-NB and AMR-WB speech coding standards are introduced,as well as the source and rate modes are overviewed briefly.And two aspects of LP(Linear Prediction)analysis and voice quality are compared.For the linear prediction analysis,Frame Size, numbers of LP,windows and spectral envelope are described mainly and the gain of the high frequency band is overviewed,then quality and computational complexity of two kinds of speech coding standards are given through the simulation results of subjective and objective comparison.Finally applications of AMR-NB and AMR-WB are statemented simply.
Keywords: speech coding the Standard of AMR-NB the Standard of AMR-WB
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