Error feedback for noise reduction in 2-D digital filters with quadrantally symmetric or antisymmetric coefficients

Author

Hinamoto, Takao ; Kuroda, Naoki ; Kuma, Toshitaka

Author_Institution

Fac. of Eng., Hiroshima Univ., Japan

Volume

4

fYear

1997

fDate

9-12 Jun 1997

Firstpage

2461

Abstract

A novel method of applying the error feedback with quadrantally symmetric or antisymmetric coefficients in two-dimensional recursive digital filters is proposed. In order for the error feedback coefficients to be represented by the set of integers, the output noise variance of the filter is discretely optimized by using the depth-first-search strategy in the branch and bound mixed integer linear programming (BBMILP). The proposed error feedback leads to significant improvement in the roundoff noise characteristics and results in significant savings in hardware as well as speed of implementation

Keywords

feedback; filtering theory; integer programming; interference suppression; linear programming; matrix algebra; recursive filters; roundoff errors; two-dimensional digital filters; 2D digital filters; antisymmetric coefficients; depth-first-search strategy; error feedback; mixed integer linear programming; noise reduction; roundoff noise characteristics; symmetric coefficients; two-dimensional recursive filters; Digital filters; Electronic switching systems; Hardware; Narrowband; Noise reduction; Noise shaping; Output feedback; Quantization; Transfer functions; Two dimensional displays;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 1997. ISCAS '97., Proceedings of 1997 IEEE International Symposium on

Print_ISBN

0-7803-3583-X

Type

conf

DOI

10.1109/ISCAS.1997.612822

Filename

612822