Title :
Design of quadrature mirror-image filter banks for low-power applications
Author :
Saab, S. ; Lu, W.-S. ; Antoniou, A.
Author_Institution :
Dept. of Electr. & Comput. Eng., Victoria Univ., BC, Canada
Abstract :
A method for the design of quadrature mirror-image filter QMF banks for low-power applications based on the algorithm of Chen and Lee (1992) is proposed. The method entails designing a sequence of cascaded filter sections such that any number of consecutive sections starting with the first one constitute an optimal design for a given set of specifications for the filter bank. The method includes modifications that allow for the increase in vanishing moments with the increase in the number of filter sections and it can incorporate techniques that facilitate control over the stopband attenuation or enable the design of low-reconstruction delay QMF banks. Using a simple adaptive mechanism, the input and output signals are used to determine the minimum number of sections that should be used in order to provide a desired performance. By turning off unrequired sections, power and computational complexity can be minimized
Keywords :
band-pass filters; cascade networks; computational complexity; quadrature mirror filters; signal reconstruction; QMF banks; cascaded filter sections; computational complexity; design method; digital filters; low-power applications; low-reconstruction delay QMF banks; optimal design; quadrature mirror-image filter banks; stopband attenuation; vanishing moments; Algorithm design and analysis; Application software; Attenuation; Channel bank filters; Delay; Design engineering; Design methodology; Filter bank; Tail; Turning;
Conference_Titel :
Communications, Computers and Signal Processing, 1997. 10 Years PACRIM 1987-1997 - Networking the Pacific Rim. 1997 IEEE Pacific Rim Conference on
Conference_Location :
Victoria, BC
Print_ISBN :
0-7803-3905-3
DOI :
10.1109/PACRIM.1997.619930
