Title :
On the Sensitivity of Two-Channel IIR Filter Banks with Variable Crossover Frequency
Author :
Certic, Jelena ; Milic, Ljiljana
Author_Institution :
Univ. of Belgrade, Belgrade
Abstract :
In this paper, we investigate the sensitivities of the magnitude responses for the two classes of two-channel IIR filter banks. The term class I denotes the IIR filter pair implemented as a parallel connection of two all-pass filters, whereas class II stays for the tapped cascaded interconnection of two identical all-pass filters. A simple tuning scheme that shifts the crossover frequency of the start-up IIR half-band filter pair to the desired location has been introduced recently. In this paper, we concentrate on the effects, which appear when the finite-precision arithmetic is used to implement the tuning formulae. For the two classes of two-channel IIR filter banks, we demonstrate by means of examples the sensitivities of the magnitude frequency characteristics, and show the effects of those sensitivities to the accuracy of the tuning procedure.
Keywords :
all-pass filters; digital filters; high-pass filters; low-pass filters; IIR filter banks; all-pass filters; filter sensitivity; finite-precision arithmetic; half-band filter pair; high-pass filter; low-pass filter; tapped cascaded interconnection; tuning scheme; two-channel filter banks; variable crossover frequency; Arithmetic; Cutoff frequency; Digital filters; Electronic mail; Filter bank; IIR filters; Power filters; Sensitivity analysis; Transfer functions; Tuning;
Conference_Titel :
Image and Signal Processing and Analysis, 2007. ISPA 2007. 5th International Symposium on
Conference_Location :
Istanbul
Print_ISBN :
978-953-184-116-0
DOI :
10.1109/ISPA.2007.4383669