speech processing (denoising audio signal) with wavelet transform

2012 1 30
5 个回答
更新时间：2022 2 2
6 次查看（30 天）

1 个投票

dear people,
i am a university student from indonesia and now i am doing my practical work at one of electronics company in here. here i get kind of job which is given by my mentor to do denoising audio signal with wavelet transform. honestly i've never learned bout wavelet yet. anybody can help me. i am stil on the way to understad its theory anyway.
regards nadya

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Abdullah its
Abdullah its 2022-2-1
Hi,ineed code denoising speech signal use wavlet transform by matlab and i
thank you

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回答（5 个）

Wayne King
Wayne King 2012-1-30

1 个投票

Nadya, If you have the Wavelet Toolbox, then all the code you likely need is available there.
See the reference material for wden for example.
Parna Bhattacharya
Parna Bhattacharya 2018-2-14

0 个投票

Dear all, I need a help in understanding the wavelet denoising on speech signal enhancement, specially at first level detail coefficients thresholding. I used toolbox and found that the denoised speech spectrogram shows having some aliased frequency components. When I use my code to threshold the first detail coefficients (high frequency band), surprisingly some unwanted noise arise in the low frequency bands, but if I apply threshold only on 2nd,3rd.. levels detail coefficients, except 1st level, no such phenomena appears.I suspect that the reconstruction of 1st level detail coefficients is generating such aliased noise components in the low frequency band of spectrogram. Does any one agree with me and how to suppress these aliased components.
Thank you, Regards, Parna
drissi sana
drissi sana 2018-4-13

0 个投票

j'ai besoin de supprimer le bruit dans un signal de parole i need too a code matlab

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