| 一种基于LVQ的语音线谱对参数量化方法 |
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| 引用本文： | 耿超,陈亮,商晓燕,山世雨.一种基于LVQ的语音线谱对参数量化方法[J].军事通信技术,2008(3). |
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| 作者姓名： | 耿超 陈亮 商晓燕 山世雨 |
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| 作者单位： | 解放军理工大学通信工程学院研究生1队;解放军理工大学通信工程学院电子信息工程系;中国人民解放军第71375部队; |
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| 摘 要： | 在现有格型矢量量化(LVQ)方法的基础上,通过对线谱对(LSP)参数进行精度预处理,使其数值更接近于格点从而减少量化失真。仿真实现了改进方法,并采用MELP算法中4级MSVQ方法作为对比。得到的结果表明,较之MSVQ,LVQ量化LSP参数的精度提升了约90%的同时,合成语音的谱失真(SD)降低了约2/3,客观评估得分和近似MOS分略有提高。
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| 关 键 词： | 线谱对参数 格型矢量量化 格点 |
Quantization of LSP Parameters Based on LVQ Method |
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| GENG Chao,CHEN Liang,SHANG Xiao-yan,SHAN Shi-yu.Quantization of LSP Parameters Based on LVQ Method[J].Journal of Military Communications Technology,2008(3). |
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| Authors: | GENG Chao CHEN Liang SHANG Xiao-yan SHAN Shi-yu |
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| Institution: | GENG Chao1,CHEN Liang2,SHANG Xiao-yan1,SHAN Shi-yu3(1.Postgraduate Team 1 ICE,PLAUST,Nanjing 210007,China,2.Department of Electronic Information Engineering ICE,3.Unit 71375 of PLA,Weifang 261041,China) |
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| Abstract: | Based on the existing method of Lattice Vector Quantization(LVQ),the value was made closer to lattice to reduce the quantization distortion by preprocessing the precision of LSP parameters.The simulation realized the improved algorithm and used the 4-stage MSVQ in MELP as a comparison.The result shows that,compared with MSVQ,LVQ improves by about 90% the precision of quantized LSP,the SD of synthesized speech goes down by 2/3,and the scores of objective evaluation and MOS rise slightly. |
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| Keywords: | LSP parameters Lattice Vector Quantization(LVQ) lattice point |
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