WFILT_SYM - Symlet filters

Usage

[h,g,a]=wfilt_sym(N);

Description

[h,g,a]=wfilt_sym(N) generates the "least asymmetric" Daubechies' orthogonal wavelets or "symlets" with N vanishing moments and length 2N. Zeros of the trigonometrical polynomial the filters consist of in the Z-plane are selected alternatingly inside and outside the unit circle.

Remark: Filters generated by this routine differ slightly from the ones in the reference (table 6.3, figure. 6.4) because of the ambiguity in the algorithm.

Examples:

wfiltinfo('sym8');