| 3GPP AMR—NB与ITU—TG．729A语音编码标准技术的对比研究 |
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| 引用本文： | 刘张宇,鲍长春,邱建伟,徐昊.3GPP AMR—NB与ITU—TG．729A语音编码标准技术的对比研究[J].电声技术,2009,33(4):56-61. |
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| 作者姓名： | 刘张宇 鲍长春 邱建伟 徐昊 |
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| 作者单位： | 北京工业大学,电子信息与控制工程学院,语音与音频信号处理实验室,北京,100124 |
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| 摘 要： | 介绍了AMR—NB与G．729A2种语音编码标准的特点和算法，并就其线性预测分析、基音搜索、代数码书搜索和增益量化4个方面技术进行了比较。在线性预测分析方面主要对2种算法的加窗、LSP量化与内插的不同进行了陈述；在基音搜索方面对开环和闭环基音搜索上的差异进行了分析，并且对代数码书结构和搜索算法及增益参数量化的差别进行了阐述。最后给出了2种编码标准的语音质量、计算复杂度、空间复杂度等性能测试结果。
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| 关 键 词： | 语音编码 AMR—NB标准 G.729A标准 |
Contrast Study on Speech Coding Techniques Between 3GPP AMR-NB and ITU-T G.729A Standards |
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| LIU Zhang-yu,BAO Chang-chun,QIU Jian-wei,XU Hao.Contrast Study on Speech Coding Techniques Between 3GPP AMR-NB and ITU-T G.729A Standards[J].Audio Engineering,2009,33(4):56-61. |
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| Authors: | LIU Zhang-yu BAO Chang-chun QIU Jian-wei XU Hao |
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| Affiliation: | Speech and Audio Signal Processing Lab;School of Electronic Information and Control Engineering;Beijing University of Technology;Beijing 100124;China |
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| Abstract: | The characteristics of AMR-NB and G.729A speech coding standards and their own algorithms are introduced, then 4 aspects of LP(Linear Prediction) analysis, pitch detection, searching of algebraic codebook and quantization of gains in both the standards are compared. In the LP analysis, the differences in the windows, the quantization and interpolation of LSP(Linear Spectral Pairs)are mainly described. In the comparison of pitch detection, the differences between open-loop and close-loop pitch detection of t... |
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| Keywords: | speech coding AMR-NB标准 G 729A标准 |
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