基于时频谱图的脉冲噪声抑制方法

王旌阳;张 潇;朱俊敏;吴粤北

振动与冲击 ›› 2010, Vol. 29 ›› Issue (2) : 149-153,.

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PDF(2388 KB)
振动与冲击 ›› 2010, Vol. 29 ›› Issue (2) : 149-153,.
论文

基于时频谱图的脉冲噪声抑制方法

  • 王旌阳1;张 潇2 ;朱俊敏1;吴粤北2
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IMPULSIVE NOISE SUPPRESSION BASED ON TIME-FREQUENCY SPECTROGRAM

  • Jingyang Wang1;Xiao Zhang2;Junmin Zhu1;Yuebei Wu2
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摘要

从时频分析的角度,提出了一种新的音频信号脉冲噪声的处理方法。该方法基于被污染信号的时频谱图,通过区分纯净信号和脉冲噪声信号的频域特性与相关性来检测脉冲噪声。首次提出前后信息相关联的“限幅”噪声抑制方法,并利用带过滤系统的中值滤波方法分别对短时和暂态两种脉冲噪声信号加以抑制和消除。和信噪比相比,还进一步提出了四个指标专门用于评价去除脉冲噪声方法的性能。基于这四个指标,分析了如何调整参数以获得更好的检测和修复性能,并用大量仿真实验证实了这种新方法的有效性。最后给出了系统仿真结果,并指出了该新方法的应用前景。

Abstract

Propose a new strategy to cope with impulsive noise in audio signal based on time-frequecy analysis. This method detects impulsive noise by distinguishing the difference of frequency characteristics and correlations between the clean and noisy signal based on the spectrogram of the corrupted audio. Introduces a scheme, “band-pass”, for the first time, and use median filter with a filtering system to suppress and remove short time and long time impulsive noises. For the sake of evaluation of a denoising strategy, further propose four criterions specially to assess the performance of various strategies compared with SNR. Based on the four criterions, firstly analyze how to adjust parameters to achieve the best performance,then extensive experiments are performed to confirm the feasibility and achievable performance of the proposed method. Finally give some insights of this novel strategy according to the simulation results.

关键词

时频分析 / 脉冲噪声 / 时频谱图 / 中值滤波

Key words

time-frequency analysis / impulsive noise / time-frequency spectrogram / median filter

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导出引用
王旌阳;张 潇;朱俊敏;吴粤北. 基于时频谱图的脉冲噪声抑制方法[J]. 振动与冲击, 2010, 29(2): 149-153,
Jingyang Wang;Xiao Zhang;Junmin Zhu;Yuebei Wu . IMPULSIVE NOISE SUPPRESSION BASED ON TIME-FREQUENCY SPECTROGRAM[J]. Journal of Vibration and Shock, 2010, 29(2): 149-153,

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