Harmonic to noise ratio calculation

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Khandaker Noman
Khandaker Noman 2019-6-28
编辑： Manuel Brandner 2020-12-19
How can i calculate the harmonic to noise ratio of a signal?

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回答（3 个）

Chinmay Anand
Chinmay Anand 2019-6-28
You can look into this link for this.
https://www.mathworks.com/help/signal/ref/snr.html
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Khandaker Noman
Khandaker Noman 2019-6-28
Actually this calculates SNR, is there any function to calculate HNR?

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KALYAN ACHARJYA
KALYAN ACHARJYA 2019-6-28
编辑：KALYAN ACHARJYA 2019-11-16
You can use this custom function to calculate harmonic to noise ratio (HNR)
To understand in detail theory, read here
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mariem khrissi
mariem khrissi 2020-11-25
does noofframes correspond to the number of frames ??
Manuel Brandner
Manuel Brandner 2020-12-19
编辑：Manuel Brandner 2020-12-19
noofframes equals signalblocks. in matlab you can use buffer to chop the signal into blocks with or without a certain overlap. Each signal block is then used in the HNR code to calculate the autocorrelation. After that the first zero crossing of the normalized autocorrelation is searched for. The maximum peak value is searched for with the max function and the sample position is then used (in the best case this gives you also the underlying fundamental frequency = fs/samplepos).
the energy at this position compared to the overall energy (value of the autocorrelation at index = 1) gives you the harmonic to noise ratio.
or for the normalized autocorrelation:
drawbacks as far as I understand it are:
  • pitch dependency
  • accuracy decreases if the signal gets more complex (in speech for example formants)
  • SNR has an influence on the values in terms of comparison of several measurement situations

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Li feng
Li feng 2019-11-16
what is noOfFrames？
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KALYAN ACHARJYA
KALYAN ACHARJYA 2019-11-16
Please write the comment in comment section only (Just below the answer).

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