Blind-Matched Filtering for Speech Enhancement with Distributed Microphones
A multichannel noise reduction and equalization approach for distributed microphones is presented. The speech enhancement is based on a blind-matched filtering algorithm that combines the microphone signals such that the output SNR is maximized. The algorithm is developed for spatially uncorrelated...
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| Format: | Article |
| Language: | English |
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Wiley
2012-01-01
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| Series: | Journal of Electrical and Computer Engineering |
| Online Access: | http://dx.doi.org/10.1155/2012/169853 |
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| author | Sebastian Stenzel Jürgen Freudenberger |
| author_facet | Sebastian Stenzel Jürgen Freudenberger |
| author_sort | Sebastian Stenzel |
| collection | DOAJ |
| description | A multichannel noise reduction and equalization approach for distributed microphones is presented. The speech enhancement is based on a blind-matched filtering algorithm that combines the microphone signals such that the output SNR is maximized. The algorithm is developed for spatially uncorrelated but nonuniform noise fields, that is, the noise signals at the different microphones are uncorrelated, but the noise power spectral densities can vary. However, no assumptions on the array geometry are made. The proposed method will be compared to the speech distortion-weighted multichannel Wiener filter (SDW-MWF). Similar to the SDW-MWF, the new algorithm requires only estimates of the input signal to noise ratios and the input cross-correlations. Hence, no explicit channel knowledge is necessary. A new version of the SDW-MWF for spatially uncorrelated noise is developed which has a reduced computational complexity, because matrix inversions can be omitted. The presented blind-matched filtering approach is similar to this SDW-MWF for spatially uncorrelated noise but additionally achieves some improvements in the speech quality due to a partial equalization of the acoustic system. |
| format | Article |
| id | doaj-art-fffbf8b219f84c29aef7555b0717ca1b |
| institution | OA Journals |
| issn | 2090-0147 2090-0155 |
| language | English |
| publishDate | 2012-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Journal of Electrical and Computer Engineering |
| spelling | doaj-art-fffbf8b219f84c29aef7555b0717ca1b2025-08-20T02:22:50ZengWileyJournal of Electrical and Computer Engineering2090-01472090-01552012-01-01201210.1155/2012/169853169853Blind-Matched Filtering for Speech Enhancement with Distributed MicrophonesSebastian Stenzel0Jürgen Freudenberger1Institute for System Dynamics, HTWG Konstanz, Brauneggerstrasse 55, 78462 Konstanz, GermanyInstitute for System Dynamics, HTWG Konstanz, Brauneggerstrasse 55, 78462 Konstanz, GermanyA multichannel noise reduction and equalization approach for distributed microphones is presented. The speech enhancement is based on a blind-matched filtering algorithm that combines the microphone signals such that the output SNR is maximized. The algorithm is developed for spatially uncorrelated but nonuniform noise fields, that is, the noise signals at the different microphones are uncorrelated, but the noise power spectral densities can vary. However, no assumptions on the array geometry are made. The proposed method will be compared to the speech distortion-weighted multichannel Wiener filter (SDW-MWF). Similar to the SDW-MWF, the new algorithm requires only estimates of the input signal to noise ratios and the input cross-correlations. Hence, no explicit channel knowledge is necessary. A new version of the SDW-MWF for spatially uncorrelated noise is developed which has a reduced computational complexity, because matrix inversions can be omitted. The presented blind-matched filtering approach is similar to this SDW-MWF for spatially uncorrelated noise but additionally achieves some improvements in the speech quality due to a partial equalization of the acoustic system.http://dx.doi.org/10.1155/2012/169853 |
| spellingShingle | Sebastian Stenzel Jürgen Freudenberger Blind-Matched Filtering for Speech Enhancement with Distributed Microphones Journal of Electrical and Computer Engineering |
| title | Blind-Matched Filtering for Speech Enhancement with Distributed Microphones |
| title_full | Blind-Matched Filtering for Speech Enhancement with Distributed Microphones |
| title_fullStr | Blind-Matched Filtering for Speech Enhancement with Distributed Microphones |
| title_full_unstemmed | Blind-Matched Filtering for Speech Enhancement with Distributed Microphones |
| title_short | Blind-Matched Filtering for Speech Enhancement with Distributed Microphones |
| title_sort | blind matched filtering for speech enhancement with distributed microphones |
| url | http://dx.doi.org/10.1155/2012/169853 |
| work_keys_str_mv | AT sebastianstenzel blindmatchedfilteringforspeechenhancementwithdistributedmicrophones AT jurgenfreudenberger blindmatchedfilteringforspeechenhancementwithdistributedmicrophones |