TY - GEN
T1 - Two channel IIR QMF banks with approximately linear-phase analysis and synthesis filters
AU - Ekanayake, M. M.
AU - Premaratne, Kamal
PY - 1994/1/1
Y1 - 1994/1/1
N2 - In this paper, a computationally simple method to obtain IIR analysis and synthesis filters that possess negligible phase distortion is presented. It is shown that for a certain class of FIR filter banks, the polyphase components are approximately all-pass. By applying the balanced reduction procedure to the polyphase components of such a FIR prototype filter all-pass IIR polyphase components are obtained. The resulting IIR designs have negligible phase distortion. Design examples indicate that the derived IIR filter banks can be implemented more efficiently than the FIR prototypes. Results show that the IIR filters are better than linear phase perfect reconstruction systems when implemented in a finite wordlength processor.
AB - In this paper, a computationally simple method to obtain IIR analysis and synthesis filters that possess negligible phase distortion is presented. It is shown that for a certain class of FIR filter banks, the polyphase components are approximately all-pass. By applying the balanced reduction procedure to the polyphase components of such a FIR prototype filter all-pass IIR polyphase components are obtained. The resulting IIR designs have negligible phase distortion. Design examples indicate that the derived IIR filter banks can be implemented more efficiently than the FIR prototypes. Results show that the IIR filters are better than linear phase perfect reconstruction systems when implemented in a finite wordlength processor.
UR - http://www.scopus.com/inward/record.url?scp=84941871757&partnerID=8YFLogxK
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U2 - 10.1109/ACSSC.1994.471611
DO - 10.1109/ACSSC.1994.471611
M3 - Conference contribution
AN - SCOPUS:84941871757
T3 - Conference Record - Asilomar Conference on Signals, Systems and Computers
SP - 1005
EP - 1009
BT - Conference Record - 28th Asilomar Conference on Signals, Systems and Computers, ACSSC 1994
PB - IEEE Computer Society
T2 - 28th Asilomar Conference on Signals, Systems and Computers, ACSSC 1994
Y2 - 31 October 1994 through 2 November 1994
ER -