Implement an alternative to SNR function

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Hasan Ghorbani
Hasan Ghorbani 2015-9-21
评论： Walter Roberson 2015-9-24
Folks,
I have x as following:
[x,Fs] = audioread(strcat(PathName,FileName));
And some noise in the form of alpha*v as below:
rng('default');
alpha=0.2;
v = randn(size(x));
I don't have Signal Processing toolbox to use snr() function. How can I find SNR as given in this equation?

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回答（1 个）

Walter Roberson
Walter Roberson 2015-9-22
hint:
sum(x.^2)
  2 个评论
Hasan Ghorbani
Hasan Ghorbani 2015-9-24
编辑：Hasan Ghorbani 2015-9-24
Thansk. Am I right by using following code:
x_snr_db = 20 * log10( sum(x.^2) / sum((alpha * v).^2) );

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