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Abstract |
AB |
[EN] Method and acoustic signal processing system for interference and noise suppression in binaural microphone configurations The invention claims a method for determining a bias reduced noise and interference estimation ( S n n ) in a binaural microphone configuration (M1, M2) with a right and a left microphone signal (x 1, x 2 ) at a timeframe with a target speaker active. The claimed method comprises the steps of:
- determining the auto power spectral density estimate of the common noise ( S n n ) comprising noise and interference components of the right and left microphone signals (x 1 , x 2 ) and
- modifying the auto power spectral density estimate of the common noise ( S n n ) by using an estimate of the magnitude squared coherence (MSC) of the noise and interference components contained in the right and left microphone signals (x 1 , x 2 ) determined at a time frame without a target speaker active. An acoustic signal processing system and a hearing aid using the method for determining a bias reduced noise and interference estimation are claimed as well. The invention offers the advantage of an improved noise reduction performance of speech enhancement algorithms. Moreover, distortions of both, the target speech signal as well as the residual noise and interference components are reduced. |
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Cited non-patent literature identified in the search |
CTNP |
BOUQUIN LE R ET AL: "ON USING THE COHERENCE FUNCTION FOR NOISE REDUCTION", SIGNAL PROCESSING 5: THEORIES AND APPLICATIONS. PROCEEDINGS OF EUSIPCO-90 FIFTH EUROPEAN SIGNAL PROCESSING CONFERENCE. BARCELONA, SEPT. 18 - 21, 1990; [PROCEEDINGS OF THE EUROPEAN SIGNAL PROCESSING CONFERENCE (EUSIPCO)], AMSTERDAM, ELSEVIER, NL, vol. 1, 18 September 1990 (1990-09-18), pages 1103 - 1106, XP000904560, ISBN: 978-0-444-88636-1 0;
K REINDL ET AL: "Speech Enhancement for Binaural Hearing Aids based on Blind Source Separation", PROCEEDINGS OF THE 4TH INTERNATIONAL SYMPOSIUM ON COMMUNICATION, ISCSP 2010, 3 March 2010 (2010-03-03) - 5 March 2010 (2010-03-05), pages 1 - 6, XP002599244, Retrieved from the Internet [retrieved on 20100903] 0;
RONG HU ET AL: "Fast Noise Compensation for Speech Separation in Diffuse Noise", ACOUSTICS, SPEECH AND SIGNAL PROCESSING, 2006. ICASSP 2006 PROCEEDINGS . 2006 IEEE INTERNATIONAL CONFERENCE ON TOULOUSE, FRANCE 14-19 MAY 2006, PISCATAWAY, NJ, USA,IEEE, PISCATAWAY, NJ, USA LNKD- DOI:10.1109/ICASSP.2006.1661413, 14 May 2006 (2006-05-14), pages V, XP031387189, ISBN: 978-1-4244-0469-8 0;
XUEFENG ZHANG ET AL: "A Soft Decision Based Noise Cross Power Spectral Density Estimation for Two-Microphone Speech Enhancement Systems", 2005 IEEE INTERNATIONAL CONFERENCE ON ACOUSTICS, SPEECH, AND SIGNAL PROCESSING (IEEE CAT. NO.05CH37625) IEEE PISCATAWAY, NJ, USA, IEEE, PISCATAWAY, NJ LNKD- DOI:10.1109/ICASSP.2005.1415238, vol. 1, 18 March 2005 (2005-03-18), pages 813 - 816, XP010792162, ISBN: 978-0-7803-8874-1 0
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