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

fYear

1990

fDate

1-3 May 1990

Firstpage

144

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 1990., IEEE International Symposium on

Conference_Location

New Orleans, LA

Type

conf

DOI

10.1109/ISCAS.1990.111943

Filename

111943