Title :
An efficient algorithm for the design of multi-channel cosine-modulated QMF banks
Author :
Xu, H. ; Lu, W.-S. ; Antoniou, A.
Author_Institution :
Dept. of Electr. & Comput. Eng., Victoria Univ., BC, Canada
Abstract :
An iterative algorithm for the design of multi-channel cosine-modulated quadrature mirror filter (QMF) banks with near-perfect reconstruction is proposed. The objective function is formulated as a quadratic function in each step whose minimum point can be obtained using a closed-form solution. This approach is very efficient and leads to filter banks with high stop-band attenuation and low aliasing and amplitude distortions. Two design examples are included to demonstrate the proposed algorithm and some comparisons are made with existing designs
Keywords :
band-pass filters; iterative methods; multidimensional digital filters; quadrature mirror filters; aliasing; amplitude distortion; closed-form solution; filter banks; iterative algorithm; multi-channel cosine-modulated QMF banks; near-perfect reconstruction; objective function; quadratic function; stop-band attenuation; Algorithm design and analysis; Attenuation; Design methodology; Filter bank; Finite impulse response filter; Image reconstruction; Iterative algorithms; Prototypes; Signal processing algorithms; Speech analysis;
Conference_Titel :
Circuits and Systems, 1995., Proceedings., Proceedings of the 38th Midwest Symposium on
Conference_Location :
Rio de Janeiro
Print_ISBN :
0-7803-2972-4
DOI :
10.1109/MWSCAS.1995.510288
