Title :
Improved iterative methods for the design of quadrature mirror-image filter banks
Author :
Xu, Hua ; Lu, Wu-Sheng ; Antoniou, Athanasios
Author_Institution :
Dept. of Electr. & Comput. Eng., Victoria Univ., BC, Canada
fDate :
5/1/1996 12:00:00 AM
Abstract :
An iterative method for the design of two-band quadrature mirror-image filter (QMF) banks proposed by Chen and Lee is examined and improved by deriving simple, explicit, and precise expressions for the evaluation of two integrals involved in the computation of the objective function. The method is then extended to the design of QMF banks with low reconstruction delays and to the design of filter banks with equiripple complex reconstruction error. The paper concludes with design examples which illustrate the efficiency and performance of the algorithms developed and the quality of the filter banks that can be designed
Keywords :
delays; encoding; filtering theory; iterative methods; quadrature mirror filters; signal reconstruction; equiripple complex reconstruction error; filter bank quality; iterative methods; objective function; reconstruction delays; signal reconstruction; two-band quadrature mirror-image filter banks; Algorithm design and analysis; Channel bank filters; Delay; Design methodology; Filter bank; Finite impulse response filter; Iterative methods; Minimax techniques; Phase distortion; Signal processing algorithms;
Journal_Title :
Circuits and Systems II: Analog and Digital Signal Processing, IEEE Transactions on
