How to Compare different signals

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Ismail on 23 Oct 2014

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Closed: MATLAB Answer Bot on 20 Aug 2021

Hello,

I have some noise measurements and 4 different models that can generate a similar noises using estimated parameters from the real measurements. To compare the estimated noises I calculated the PDF, the CCDF and the PSD.

To compare the results I used the Kull-Back Leibler divergence of the PDF, the MSE of the CCDF and the RMSE and the corr2 matlab function for the PSD.

I am not sure if I did the right thing.

Can you please tell me if what I did is correct and do you know any other way or function to make such comparison?

Thanks.

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Image Analyst on 23 Oct 2014

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psnr.m

You can also use PSNR http://en.wikipedia.org/wiki/Peak_signal-to-noise_ratio or psnr() which is in the Image Processing Toolbox. See attached demo if you don't have that.

For images, there is also the SSIM http://en.wikipedia.org/wiki/Structural_similarity and other methods: http://en.wikipedia.org/wiki/Image_quality.

For video signals, see http://en.wikipedia.org/wiki/Subjective_video_quality