| 最新的ITU-T嵌入式变速率语音编码关键技术 |
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| 引用本文： | 李海婷,范睿,朱恒,刘泽新,鲍长春,贾懋珅,李锐.最新的ITU-T嵌入式变速率语音编码关键技术[J].电声技术,2006(11):50-55,58. |
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| 作者姓名： | 李海婷 范睿 朱恒 刘泽新 鲍长春 贾懋珅 李锐 |
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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研究室,北京,100022 |
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| 摘 要： | 介绍了ITU-T的新一代语音编码标准G.729.1的编码器、译码器原理,讨论了此标准实现码流嵌入式所采用的关键技术:嵌入式的码激励线性预测编码技术、时域频带扩展技术以及时域混叠抵消的预测变换编码技术,并通过客观评测验证了G.729.1语音编码标准的高性能。
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| 关 键 词： | 语音编码 音频编码 嵌入式编解码器 |
| 文章编号： | 1002-8684（2006）11-0050-06 |
| 收稿时间： | 2006-07-02 |
| 修稿时间： | 2006-07-02 |
Key Techniques of the Latest ITU-T Embedded Variable Bit-Rate Speech Coding |
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| LI Hai-ting,FAN Rui,ZHU Heng,LIU Ze-xin,BAO Chang-chun,JIA Mao-shen,LI Rui.Key Techniques of the Latest ITU-T Embedded Variable Bit-Rate Speech Coding[J].Audio Engineering,2006(11):50-55,58. |
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| Authors: | LI Hai-ting FAN Rui ZHU Heng LIU Ze-xin BAO Chang-chun JIA Mao-shen LI Rui |
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| Affiliation: | Speech and Audio Signal Processing Lab, School of Electronic Information and Control Engineering, Beijing University of Technology, Beijing 100022, China |
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| Abstract: | The encoder and decoder of ITU-T G.729.1 speech coding standards are introduced.Some key techniques of achieving embedded bit-stream,such as embedded code-excited linear-prediction coding,time-domain bandwidth extension and predictive transform coding that is referred to as time-domain aliasing cancellation are discussed as well.The objective quality tests have shown that the G.729.1 has a very high performance. |
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| Keywords: | speech coding audio coding embedded codec |
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