Title :
Quadrature mirror filter design by Chebyshev approximation
Author :
Chang, Wen-Thong ; Lin, Puling-Shing
Author_Institution :
Dept. of Commun. Eng., Nat. Chiao-Tung Univ., Taiwan
Abstract :
The design of a half-band filter for subband coding systems is discussed. The characteristics of both the time and frequency responses of the half-band filter are used in order to reduce the computation time and increase the computation accuracy. The constraint for such a filter is that the even terms of its impulse response must be zero in order to meet the requirement of a uniform frequency response for the whole system. An algorithm based on the Chebyshev approximation that utilizes only odd-symmetry polynomials for frequency interpolation to meet the required frequency response of the half-band filter is proposed
Keywords :
Chebyshev approximation; digital filters; filtering and prediction theory; frequency response; polynomials; Chebyshev approximation; computation accuracy; computation time reduction; frequency interpolation; frequency response; half-band filter; impulse response; odd-symmetry polynomials; subband coding systems; time response; Chebyshev approximation; Filter bank; Finite impulse response filter; Frequency response; Industrial electronics; Interpolation; Mirrors; Signal processing algorithms; Transfer functions; Tree data structures;
Conference_Titel :
Circuits and Systems, 1990., IEEE International Symposium on
Conference_Location :
New Orleans, LA
DOI :
10.1109/ISCAS.1990.111943
