-
Notifications
You must be signed in to change notification settings - Fork 12
New issue
Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.
By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.
Already on GitHub? Sign in to your account
Noise reduced signal and option to change window function in AnalysisPrograms #485
Comments
As far as I know our noise removal is applied to the spectrogram and not the waveform. If you did want a noise reduced waveform, then this would not be a simple task. If you could make do with a noise reduced spectrogram, then that we could achieve easily. @towsey can you confirm what I've stated is correct? |
Thanks @atruskie this makes sense. It is a difficult task and I did achieve it using https://github.com/timsainb/noisereduce and seewave pause in R to quite a high satisfaction after a lot of work, The problem is the accurate locatation of a noise sample. Is it possible to build in the Blackman, Hann and Bartlett window functions as this would be useful for my images? Specifically within the C:\AP\ConfigFiles\Towsey.Acoustic.HiResIndicesForRecognisers.yml? |
I had a look at that repo, and in principle we could reproduce that, but using our noise algorithm which does not require sample selection. I'm not sure we'll have the time though - I'll need some dedicated time and that needs to be approved. So, would the noise reduced spectrogram matrix be useful? We could do that in the interim. |
Hi Anthony, after consideration it is not possible to use the noise reduced spectrogram to produce my images. |
Noise reduced signal and option to change window function from AnalysisPrograms
I would like an option in Analysis Programs to output the signal after the Lamel noise reduction. I need the audio time series after noise reduction not the spectrogram. Is this possible? Or does the noise reduction occur on the spectrogram?
I would also like an option to choose another window function eg. Blackmann, Hann or Bartlett replacing the default Hamming function.
Proposal:
Please add an option to output in csv or other format the audio signal after noise reduction and an option to change the window function.
Additional context
I am producing a series of coloured images from each 10 second segment of audio. These images include Grey-scale spectrograms, mel-frequency cepstral coefficient, fast chiplet transforms in python which require an initial noise reduced signal.
The text was updated successfully, but these errors were encountered: