Mercurial > hg > emotion-detection-top-level
comparison Code/Descriptors/yin/private/src/rdiff_inplace.m @ 0:ea0c737c6323
first commit
| author | Dawn Black <dawn.black@eecs.qmul.ac.uk> |
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| date | Thu, 26 Jul 2012 14:46:25 +0100 |
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| -1:000000000000 | 0:ea0c737c6323 |
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| 1 % rdiff_inplace(x,y,d,lags,n) - in place running cross-difference function | |
| 2 % | |
| 3 % x: column vector | |
| 4 % y: column vector | |
| 5 % r: result matrix (time X lag) | |
| 6 % lags: 2-column matrix of lags | |
| 7 % n: (samples) frame-rate & window size (default=1) | |
| 8 % | |
| 9 % Vectors x and y are each delayed by amounts specified by lags and subtracted | |
| 10 % sample to sample. The difference is squared and added over a time window | |
| 11 % of n samples. This processing is repeated every n samples, as many times | |
| 12 % as there are columns in r. | |
| 13 % | |
| 14 % A positive lag applied to x causes it to be delayed with respect to y. | |
| 15 % A positive lag applied to y causes it to be delayed with respect to x. | |
| 16 % The number of rows of r must match that of lags. | |
| 17 % | |
| 18 % Mex function. | |
| 19 % Beware: input arguments are assigned to. This is not matlab-kosher! |