| 一种改善激励源的1.2kb/s语音编码算法及其实时实现 |
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| 引用本文： | 陈亮,张雄伟,陆惠娣.一种改善激励源的1.2kb/s语音编码算法及其实时实现[J].解放军理工大学学报,2002,3(4):5-9. |
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| 作者姓名： | 陈亮 张雄伟 陆惠娣 |
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| 作者单位： | [1]解放军理工大学通信工程学院，江苏南京210007 [2]南京军区第一通信总站，江苏南京210016 |
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| 摘 要： | 为了适应无线通信等低速语音编码场合，吸收2.4kb/sMELP算法优点，提出了一种改善激励源的1.2kb/s混合激励线性预测算法，该算法在模型结构、LSP量化及解码等方面较传统的2.4kb/sLPC算法有了较大改进。同时，选用TMS320VC5416DSP芯片实时实现了以该算法为核心的声码器。客观音质测试和非正式主观测试结果表明，该算法在自然度、清晰度和抗噪声等方面明显优于2.4kb/sLPC算法，是低速率下一种良好的编码方案。
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| 关 键 词： | 激励源 语音编码 TMS320VC5416 声码器 2.4kb/s混合激励线性预测算法 语音压缩 |
| 文章编号： | 1009-3443(2002)04-0005-05 |
| 修稿时间： | 2002年1月23日 |
An Improved 1. 2 kb/ s Speech Coding Algor ithm and its
Real-time Implementation |
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| CHEN Liang,ZHANG Xiong-wei and LU Hui-di.An Improved 1. 2 kb/ s Speech Coding Algor ithm and its
Real-time Implementation[J].Journal of PLA University of Science and Technology(Natural Science Edition),2002,3(4):5-9. |
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| Authors: | CHEN Liang ZHANG Xiong-wei and LU Hui-di |
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| Institution: | CHEN Liang 1,ZHANG Xiong-wei 1,LU Hui-di 2 |
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| Abstract: | In order to meet the needs of wireless communication, a new 1.2 kb/s speech coding algorithm based on mixed excitation linear prediction is proposed in this paper. Compared with the traditional 2.4 kb/s LPC algorithm, this new algorithm improves several aspects such as model structue, LSP quantization and decoding. This algorithm has been implemented on TMS320VC5416 DSP processor. Objective speech quality testing and informal listening testing results show that the intelligibility, naturalness and anti-noise performance of the 1.2 kb/s speech coding algorithm excel 2.4 kb/s LPC algorithm. |
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| Keywords: | speech coding mixed excitation TMS320VC5416 vocoder |
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