| 基于短时分数阶傅里叶变换的语音增强算法 |
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| 引用本文： | 杨桂芹,徐红莉,唐铭卓.基于短时分数阶傅里叶变换的语音增强算法[J].测控技术,2011,30(1):42-44. |
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| 作者姓名： | 杨桂芹 徐红莉 唐铭卓 |
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| 作者单位： | 兰州交通大学电子与信息工程学院; |
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| 基金项目： | 甘肃省自然科学基金资助项目(3ZS061-A25-056) |
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| 摘 要： | 提出了一种基于短时分数阶傅里叶变换(STFRFT)的语音增强新方法.该方法首先将带噪语音信号进行短时分数阶傅里叶变换,然后在分数阶傅里叶域(FRFD)对信号进行滤波,最后对滤波后的信号进行短时分数阶傅里叶逆变换,得到增强后的语音信号.实验表明在选定最佳的分数阶阶数时,可使噪声得到最大限度的滤除,大大提高了语音增强效果.
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| 关 键 词： | 短时分数傅里叶变换 滤波 语音增强 |
Method for Speech Enhancement Based on Short-Time Fractional Fourier Transform |
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| YANG Gui-qin,XU Hong-li,TANG Ming-zhuo.Method for Speech Enhancement Based on Short-Time Fractional Fourier Transform[J].Measurement & Control Technology,2011,30(1):42-44. |
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| Authors: | YANG Gui-qin XU Hong-li TANG Ming-zhuo |
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| Affiliation: | YANG Gui-qin,XU Hong-li,TANG Ming-zhuo(School of Electronics & Information Engineering,Lanzhou Jiaotong University,Lanzhou 730070,China) |
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| Abstract: | A new method for speech enhancement is proposed,which is based on short-time fractional Fourier transform(STFRFT).Firstly,noisy signal is processed by STFRFT.Then,the noisy signal is filtered in fractional Fourier domain(FRFD).Finally,the enhanced signal is obtained by using inverse short-time fractional Fourier transform(ISTFRFT) to the filtered signal.Simulation experiments indicate that when it is given an optimal fractional order,noise can be denoised maximumly,which greatly improves the quality of spee... |
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| Keywords: | STFRFT filtering speech enhancement |
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