Title :
Design of wavelet filters based on digital complex allpass filters
Author :
Vazquez, Alfonso Fernandez ; Dolecek, XGordana Jovanovic
Author_Institution :
Dept. of Electron., INAOE, Puebla, Mexico
Abstract :
A method for designing IIR complex wavelet filters based on complex allpass filters, that are maximally flat at ω=0 is presented. This allpass filter is obtained from a complex all-pole filter with a desired flatness at ω=0. The parameters of the complex allpass filter design are the order of the filter, N, the degree of flatness, K, and the phase, φ0, at ω=0. The real and imaginary parts of the filter coefficients are computed from the proposed iterative equations.
Keywords :
IIR filters; all-pass filters; filtering theory; iterative methods; poles and zeros; wavelet transforms; IIR complex wavelet filters; IIR filters; all-pole filter; digital complex allpass filters; filter coefficients; flatness; imaginary part; iterative equations; phase; real part; wavelet filter design; Design methodology; Digital filters; Equations; Finite impulse response filter; Frequency; IIR filters; Image processing; Nonlinear filters; Propagation delay; Proposals;
Conference_Titel :
Circuits and Systems, 2005. ISCAS 2005. IEEE International Symposium on
Print_ISBN :
0-7803-8834-8
DOI :
10.1109/ISCAS.2005.1464719
