Calculating the SNR of quantized audio

2 次查看（过去 30 天）

Vinci 2018-8-5

编辑： Vinci 2018-8-6

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?

Image Analyst 2018-8-5

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?

Vinci 2018-8-5

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 2018-8-5

Why not try imquantize()?

在 Help Center 和 File Exchange 中查找有关 Simulation, Tuning, and Visualization 的更多信息

Find the treasures in MATLAB Central and discover how the community can help you!

Translated by