Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/35739
Title: FPGA multi-filter system for speech enhancement via multi-criteria optimization
Authors: Yiu, KFC 
Li, ZB
Low, SY
Nordholm, S
Keywords: Signal enhancement
Multi-criteria
FPGA
Issue Date: 2014
Publisher: Elsevier
Source: Applied soft computing, 2014, v. 21, p. 533-541 How to cite?
Journal: Applied soft computing 
Abstract: Speech is the main medium for human communication and interaction. Apart from the traditional telephones, more and more applications come with speech interfaces, which use speech signal as an input for various purposes. However, many of these applications might fail to perform in noisy environments as the signal-to-noise ratio (SNR) degrades. Two important measures for any speech enhancement algorithm are noise suppression and speech distortion. Naturally, different speech enhancement algorithms will have different trade-offs. Moreover, depending on the environment, it is possible that one algorithm will outperform the others in some respects. This paper proposes a multi-filter system, which has the capability of continually adjusting the noise suppression level and the speech distortion level in a Pareto fashion. Moreover, we show that the system works under a variety of noisy environments and we obtain the efficient frontier of the combined filters for each background noise. Because the multi-filters are adapting in parallel, the final system can be implemented on FPGA efficiently.
URI: http://hdl.handle.net/10397/35739
ISSN: 1568-4946
DOI: 10.1016/j.asoc.2014.03.016
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