Mercurial > hg > smallbox

annotate util/snr.m @ 188:2f5ce7c8792a danieleb

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
removed check for wLength as not necessary.
author daniele@danieleb.com
date Wed, 15 Feb 2012 11:02:45 +0100
parents 88578ec2f94a
children
rev   line source
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(:)));