Efficient Non-Uniform Filter-Bank Equalizer
Löllmann H, Vary P (2005)
Publication Language: English
Publication Type: Conference contribution, Conference Contribution
Publication year: 2005
Pages Range: 1-5
Conference Proceedings Title: Proceedings of European Signal Processing Conference (EUSIPCO)
Event location: Antalya
URI: http://www.eusipco2005.org
Abstract
An efficient realization of a low delay filter-bank will be proposed, which can be regarded as a filter-bank used as equalizer with either fixed or time-varying spectral gain factors. The proposed filter-bank equalizer (FBE) results in a time-domain filter whose coefficients are adapted in the (short-term) spectral-domain. Perfect signal reconstruction is obtained for a broad class of spectral transforms, including the generalized discrete Fourier transform (GDFT), the Walsh and Hadamard transform, with less restrictions compared to a common analysis-synthesis filter-bank (AS FB). A non-uniform frequency resolution can be achieved by frequency warping based on an allpass transformation. In this case, the filter-bank equalizer can achieve near perfect signal reconstruction with lower effort than for an allpass transformed analysis-synthesis filter-bank. The filter-bank equalizer is especially useful for adaptive filtering requiring a low signal delay with coefficient adaptation based on frequency-domain algorithms.
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How to cite
APA:
Löllmann, H., & Vary, P. (2005). Efficient Non-Uniform Filter-Bank Equalizer. In EURASIP (Eds.), Proceedings of European Signal Processing Conference (EUSIPCO) (pp. 1-5). Antalya, TR.
MLA:
Löllmann, Heinrich, and Peter Vary. "Efficient Non-Uniform Filter-Bank Equalizer." Proceedings of the European Signal Processing Conference (EUSIPCO), Antalya Ed. EURASIP, 2005. 1-5.
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