| VoIP G.723.1语音算法的优化与实现 |
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| 引用本文： | 廖日坤,纪越峰,李慧.VoIP G.723.1语音算法的优化与实现[J].西安外事学院学报,2007(3). |
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| 作者姓名： | 廖日坤 纪越峰 李慧 |
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| 作者单位： | 北京邮电大学电信工程学院 北京100876 |
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| 基金项目： | 国家自然科学基金(No60572021)，国家杰出青年科学基金(No60325104) |
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| 摘 要： | 提出一种VoIP G.723.1双速率语音算法汇编优化及其DSP实现方法。通过阐述G.723.1信源编码的实现过程,讨论纯C代码在DSP平台上运行速度慢的原因。对关键代码全汇编优化以及优化过程的同步调试,采用该方法的优化结果和预期优化结果基本符合。FIFO环形缓冲区可以实现实时语音播放和IP-Phone,PESQ测试结果表明系统满足VoIP语音的质量要求。
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| 关 键 词： | G.723.1 DSP 优化技术 语音编码 |
Optimization and Realization of G.723.1 algorithm in VoIP |
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| Liao Rikun,Ji Yuefeng,Li Hui.Optimization and Realization of G.723.1 algorithm in VoIP[J].Journal of Xi＇an International University,2007(3). |
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| Authors: | Liao Rikun Ji Yuefeng Li Hui |
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| Abstract: | An assembly optimized method of VoIP-G.723.1 Dual Rate Speech algorithm and DSP implementation was proposed.Through describing the realization of G.723.1 codec,the reason why causes the pure C code running slowly was discussed.With the method of complete assembly optimization for the key code and synchronous debugging in optimized process,the optimization result basically coincides with that predicted by this method.Circular FIFO buffer can realize of real-time speech playing and IP-Phone on which satisfies the VoIP speech quality with the PESQ(Perceptual Evaluation of Speech Quality)results. |
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| Keywords: | G 723 1 DSP optimized techniques voice codec |
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