spectral subtraction for sphinx 4

Speech Recognition Toolkit

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spectral subtraction for sphinx 4

Forum: Help

Created: 2019-09-25

Updated: 2019-09-25

soy - 2019-09-25

Dear Nickolay,
I would like to ask about spectral subtraction technique and its implementation in sphinx. How can i used to reduce noise.
Thanks in advance.

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- Nickolay V. Shmyrev - 2019-09-25
  
  Free free to ask, what is your question please? It is enabled by default and reduces the noise online by subtracting the static white noise from the signal.
  
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soy - 2019-09-25

Thank you for your reply
There is a way to evaluate my system without this front-end step?

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- Nickolay V. Shmyrev - 2019-09-25
  
  Yes, you can modify perl script to compute features to add -remove_noise no option to sphinx_fe.
  
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soy - 2019-09-25

Thnx
Could you please give me more details on algorithm and theoretical background of this module

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- Nickolay V. Shmyrev - 2019-09-25
  
  Details are in the code. For the theory you can read https://www.cs.cmu.edu/~chanwook/MyPapers/PNCC_INTERSPEECH_ver03.pdf
  
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soy - 2019-09-25

Ok
Thank you

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