| 基于折线削波电平的自相关函数法检测基音 |
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| 引用本文： | 张永亮,李凌,张先庭.基于折线削波电平的自相关函数法检测基音[J].电声技术,2009,33(1):52-54. |
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| 作者姓名： | 张永亮 李凌 张先庭 |
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| 作者单位： | 1. 南昌航空大学电子信息工程学院,江西,南昌,330063
2. 南京航空航天大学自动化学院,江苏,南京,210016 |
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| 基金项目： | 南昌航空大学校级科研项目 |
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| 摘 要： | 基音信息隐含于语音信号的局部极值点处,将语音信号分帧后,通过修正由局部极值点拟合的包络线得到折线削波电平,并将削波后的信号用自相关函数法估计基音。数值实验表明,语音信号经折线削波较中心削波后可保留更多的基音信息,并能有效地减少基音检测的错误。
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| 关 键 词： | 基音检测 自相关函数 削波电平 |
Pitch Detection Based on Autocorrelation Function of Polyline Clipping Level |
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| ZHANG Yong-liang,LI Ling,ZHANG Xian-ting.Pitch Detection Based on Autocorrelation Function of Polyline Clipping Level[J].Audio Engineering,2009,33(1):52-54. |
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| Authors: | ZHANG Yong-liang LI Ling ZHANG Xian-ting |
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| Affiliation: | 1.Electronic and Information Engineering College;Nanchang Hangkong University;Nanchang 330063;China;2.College of Automation;Nanjing University of Aeronautics and Astronautics;Nanjing 210016;China |
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| Abstract: | Pitch information hides in the local extrema in speech signal, and polyline clipping level is acquired by modifying the envelop of local extrema in a frame of speech.Pitch can be detected by calculating the residual signal by the method of autocorrelation function.Numerical analysis indicates that more pitch information can be reserved adopting polyline clipping level than adopting center clipping level, and the error of pitch detecting can be reduced effectively. |
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| Keywords: | pitch detection auto-correlation function clipping level |
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