Defining variables to comput the ISNR

Hi,

I have to modify a script so that it automatically computes the ISNR. I learned that the formula for computing the ISNR is ISRN=10*log10(num/den). However, I don't know how to define "num" and "den".

num = sum of all the terms of the squared difference between original and noisy

den = sum of all the terms of the squared difference between original and restored

Can someone help me with this?

Regards,

Daniel

Answer 1

[Walter Roberson]

sum((double(original(:)) - double(noisy(:))).^2)

[Daniel_DG]

Thanks!