The discrete multiple wavelet transform and thresholding methods
T. R. DOWNIE, B. W. Silverman · IEEE Transactions on Signal Processing · 1998
We propose thresholding for multiwavelets considering the coefficient vectors as a whole rather than thresholding individual elements. A multivariate universal threshold is obtained using the /spl chi//sup 2/ distribution. Simulations indicate that using the GHM multiwavelet with appropriate preprocessing, our method outperforms univariate thresholding of both GHM and Daubechies wavelet decompositions.