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view util/snr.m @ 193:cc540df790f4 danieleb

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Simple example that demonstrated dictionary learning... to be completed
author Daniele Barchiesi <daniele.barchiesi@eecs.qmul.ac.uk>
date Fri, 09 Mar 2012 15:12:01 +0000
parents 88578ec2f94a
children
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function x = snr(s,r)
% SNR calculates the signal-to-noise ratio between the signal s and its
% representation r defined as:
% SNR = 20*log10(||s||_2/||s-r||_2)
err = s-r;
x = mag2db(norm(s(:))/norm(err(:)));