DocumentCode :
1103581
Title :
New quadrature mirror filter structures
Author :
Galand, Claude R. ; Nussbaumer, Henri J.
Author_Institution :
IBM, La Gaude, France
Volume :
32
Issue :
3
fYear :
1984
fDate :
6/1/1984 12:00:00 AM
Firstpage :
522
Lastpage :
531
Abstract :
This paper introduces new quadrature mirror filter (QMF) structures for the frequency domain analysis and synthesis of digital signals. The conventional QMF technique is first extended to cover complex quadrature mirror filters (CQMF) in which a digital signal is split into N adjacent complex subbands where the real and imaginary parts are subsampled by 1/2N with respect to the original signal. The computational complexity of QMF banks is then analyzed and a new scheme which reduces the computational complexity by about a factor of two over conventional QMF implementations is proposed. Finally, the filter design tradeoffs are discussed and the microprogramed implementation of QMF banks is evaluated.
Keywords :
Band pass filters; Filtering; Finite impulse response filter; Fourier transforms; Frequency response; Low pass filters; Mirrors; Sampling methods; Signal reconstruction; Signal synthesis;
fLanguage :
English
Journal_Title :
Acoustics, Speech and Signal Processing, IEEE Transactions on
Publisher :
ieee
ISSN :
0096-3518
Type :
jour
DOI :
10.1109/TASSP.1984.1164356
Filename :
1164356
Link To Document :
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