| 一种改进的语音二项式正弦脉冲激励方案 |
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| 引用本文： | 邓立新,张玲华,郑宝玉.一种改进的语音二项式正弦脉冲激励方案[J].南京邮电大学学报(自然科学版),2005,25(1):24-29. |
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| 作者姓名： | 邓立新 张玲华 郑宝玉 |
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| 作者单位： | 南京邮电学院,信息工程系,江苏,南京,210003 |
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| 基金项目： | 江苏省普通高校自然科学研究计划 ( 00KJB510003 )资助项目 |
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| 摘 要： | 对一种码率在 2. 4kbit/s左右的基于LPC(线性预测编码)的二项式正弦脉冲(BSP)激励形式进行了改进,以多个正弦谐波代替了原BSP激励方案中的单一正弦波。谐波幅度用二项式进行调制,该二项式反映了激励信号在一个基音周期内的变化趋势。实验结果表明,在此基础上构造的语音编解码器在保持原BSP编解码器低复杂度、低时延优点的基础上,进一步提高了合成语音质量。
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| 关 键 词： | 语音 激励 谐波 二项式正弦脉冲 编码 合成 |
| 文章编号： | 1000-1972(2005)01-0024-06 |
| 修稿时间： | 2003年12月23 |
An Improved Binomial Sine Pulse Excitation Model for Linear Prediction-Based Speech Codecs |
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| DENG Li-xin,ZHANG Ling-hua,ZHENG Bao-yu.An Improved Binomial Sine Pulse Excitation Model for Linear Prediction-Based Speech Codecs[J].Journal of Nanjing University of Posts and Telecommunications,2005,25(1):24-29. |
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| Authors: | DENG Li-xin ZHANG Ling-hua ZHENG Bao-yu |
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| Institution: | DENG Li-xin,ZHANG Ling-hua,ZHENG Bao-yu Department of Information Engineering,Nanjing University of Post and Telecommunications,Nanjing 210003,China |
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| Abstract: | We present in this paper an improved Binomial Sine Pulse (BSP) excitation signal used in linear prediction-based speech codecs which works around 2.4kbps. In the structure of the BSP excitation signal, the monophonic sine wave is replaced by the harmonious sine wave , whose amplitude is modulated by a binomial signal. The binomial signal describes the various trends of excitation signals in a pitch period. Experiment results show that such an improved speech codec can provide higher intelligible synthesized speech than the originally BSP codec. |
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| Keywords: | Speech Excitation harmonious Binomial sine pulse coding synthesis |
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