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Multiresolution analysis, its link to the discrete parameter wavelet transform, and its initialization

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2 Author(s)
Chan, Y.T. ; Dept. of Electr. & Comput. Eng., R. Mil. Coll. of Canada, Kingston, Ont., Canada ; Ho, K.C.

By establishing an equivalence between the discrete parameter (DP) wavelet transform and the multiresolution analysis (MRA) detail coefficients, a simple derivation of the two-scale wavelet equations is given. MRA computes the DP of a signal s(t) only if the MRA inputs s(n) are samples of the inner product of s(t) and the scaling function. This is seldom true in practice. A prefiltering of s(n), as an approximate initialization, is necessary to make the MRA detail coefficients closer to the DP coefficients. A new prefiltering scheme is proposed and shown to be effective in an example

Published in:

Signal Processing, IEEE Transactions on  (Volume:44 ,  Issue: 4 )

Date of Publication:

Apr 1996

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