Mercurial > hg > smallbox
annotate util/snr.m @ 193:cc540df790f4 danieleb
Simple example that demonstrated dictionary learning... to be completed
author | Daniele Barchiesi <daniele.barchiesi@eecs.qmul.ac.uk> |
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date | Fri, 09 Mar 2012 15:12:01 +0000 |
parents | 88578ec2f94a |
children |
rev | line source |
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daniele@162 | 1 function x = snr(s,r) |
daniele@162 | 2 % SNR calculates the signal-to-noise ratio between the signal s and its |
daniele@162 | 3 % representation r defined as: |
daniele@162 | 4 % SNR = 20*log10(||s||_2/||s-r||_2) |
daniele@162 | 5 err = s-r; |
daniele@162 | 6 x = mag2db(norm(s(:))/norm(err(:))); |