| 改进的阈值函数去噪算法 |
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| 引用本文： | 张金榜,孙艺笑,王润典,徐磊.改进的阈值函数去噪算法[J].电子科技,2014,27(2):17-20,24. |
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| 作者姓名： | 张金榜 孙艺笑 王润典 徐磊 |
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| 作者单位： | (武警警官学院 信息工程系,四川 成都 610213) |
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| 摘 要： | 针对软、硬阈值函数存在的恒定偏差以及在小波系数较小时置零的问题,提出了改进的阈值函数去噪算法。该算法在继承了软阈值函数优点的基础上,利用指数函数改进阈值函数。实验表明,改进的算法降噪后的语音信噪比显著提高、降噪效果明显、信号波形更加平滑、且失真度小。
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| 关 键 词： | 硬阈值函数 软阈值函数 去噪算法 |
An Improved Threshold Denoising Algorithm |
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| ZHANG Jinbang,SUN Yixiao,WANG Rundian,XU Lei.An Improved Threshold Denoising Algorithm[J].Electronic Science and Technology,2014,27(2):17-20,24. |
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| Authors: | ZHANG Jinbang SUN Yixiao WANG Rundian XU Lei |
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| Affiliation: | (Department of Information Engineering,Officers College of CAPF,Chengdu 610213,China) |
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| Abstract: | An improved threshold denoising algorithm was proposed aiming at the problem of the invariable warp existing in flexible threshold and setting zero when the quotiety of wavelet was smaller existing in forcedly thresh- old. This algorithm has used exponent function to improve the threshold function came to the advantages of the flexible threshold. The simulation results show that denoised speech signal-to-noise ratio larger improvement, smoother sig- nal, lower distortion, sharper noise reduction when compared with traditional algorithm. |
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| Keywords: | flexible threshold forcedly threshold denoising algorithm |
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