Single Channel Speech Enhancement Using Adaptive Soft-Thresholding with Bivariate EMD
Figure 2
(a) Fourier log spectrum of IMFs of fGn. The energy peak of any IMF is at the half of the frequency of the previous one which illustrates the characteristics of dyadic filter bank. (b) Log energies of individual IMFs of fGn. It decreases almost linearly, and higher frequency (lower order) IMFs contain more energies.
