Estimate noise of 1-D wavelet coefficients
STDC = wnoisest(C,L,S)
estimates of the detail coefficients' standard deviation for levels contained in the input vector S
init = 2055415866; rand('seed',init); x = rand(1,1000,'normal'); [c,l] = wavedec(x,2,'db3'); wnoisest(c,l,1:2)
Holger Nahrstaedt