Calculating the SNR of quantized audio

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Vinci
Vinci le 5 Août 2018
Modifié(e) : Vinci le 6 Août 2018
I'm trying to calculate the SNR of my original audio signal and the quantization signal from 16 bits down to 1 bit.
My original audio signal is:
signal = getaudiodata(recording, 'int16');
I'm using bitshift to remove the LSB:
quantsignal = bitshift(quantsignal, -1);
How to I now calculate the SNR of signal and quantsignal?

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Réponses (1)

Image Analyst
Image Analyst le 5 Août 2018
Looks like you're not scaling back up when you divide by 2. You're not just removing bits, you're cutting the amplitude in half also.
Why not just use bitset() to start clearing bits?
  2 commentaires
Vinci
Vinci le 5 Août 2018
I've tried replacing:
% Remove LSB using division
quantsignal = quantsignal/2;
With:
% Remove LSB using bitshift
quantsignal = bitshift(quantsignal, -1);
But still not working correctly.
Image Analyst
Image Analyst le 5 Août 2018
Why not try imquantize()?

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