WO2004083884A3 - Verfahren und vorrichtung zum entmischen akustischer signale - Google Patents

Verfahren und vorrichtung zum entmischen akustischer signale Download PDF

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Publication number
WO2004083884A3
WO2004083884A3 PCT/DE2004/000450 DE2004000450W WO2004083884A3 WO 2004083884 A3 WO2004083884 A3 WO 2004083884A3 DE 2004000450 W DE2004000450 W DE 2004000450W WO 2004083884 A3 WO2004083884 A3 WO 2004083884A3
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WO
WIPO (PCT)
Prior art keywords
dependent
acoustic
frequency
signals
time
Prior art date
Application number
PCT/DE2004/000450
Other languages
English (en)
French (fr)
Other versions
WO2004083884A2 (de
Inventor
Dorothea Kolossa
Wolf Baumann
Reinhold Orglmeister
Original Assignee
Univ Berlin Tech
Dorothea Kolossa
Wolf Baumann
Reinhold Orglmeister
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Univ Berlin Tech, Dorothea Kolossa, Wolf Baumann, Reinhold Orglmeister filed Critical Univ Berlin Tech
Publication of WO2004083884A2 publication Critical patent/WO2004083884A2/de
Publication of WO2004083884A3 publication Critical patent/WO2004083884A3/de

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Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
    • G10L21/00—Processing of the speech or voice signal to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
    • G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation
    • G10L21/0272—Voice signal separating
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
    • G10L21/00—Processing of the speech or voice signal to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
    • G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation
    • G10L21/0208—Noise filtering
    • G10L21/0216—Noise filtering characterised by the method used for estimating noise
    • G10L2021/02161—Number of inputs available containing the signal or the noise to be suppressed
    • G10L2021/02165—Two microphones, one receiving mainly the noise signal and the other one mainly the speech signal

Abstract

Die Erfindung betrifft ein Verfahren und eine Vorrichtung zum Entmischen von akustischen Signalen. Bei dem werden mit Hilfe von wenigstens zwei akustischen Sensoren M1 und M2 mindestens zwei zeitabhängige akustische Mischsignale x1(t) und x2(t) erfaßt, die jeweils gemischte Signalanteile zeitabhängiger akustischer Quellsignale sl(t) und s2(t) von akustischen Signalquellen Q1 und Q2 umfassen. Die akustischen Mischsignale xl(t) und x2(t) werden zum Bilden von frequenzabhängigen Mischsignalen X1(ω) und X2(ω) mit Hilfe einer Verarbeitungseinrichtung in den Frequenzbereich transformiert werden. Mit Hilfe der Verarbeitungseinrichtung werden die frequenzabhängigen Mischsignale X1(ω) und X2(ω) mittels einer im Frequenzbereich ausgeführten Null-Beamforming-Analyse auf Basis eines Delay-and-Sum Verfahrens analysiert, um entmischte frequenzabhängige Ausgangssignale Yl(ω) und Y2(ω) zu bilden, die anschließend in entmischte zeitabhängige Ausgangssignale yl(t) und y2(t) transformiert werden, wobei Einfallswinkel φ1 und φ2 der aus den zeitabhängigen akustischen Mischsignalen xl(t) und x2(t) abgeleiteten, frequenzabhängigen Mischsignale X1(ω) bzw. X2(ω) bei der Null-Beamforming-Analyse auf Basis des Delay-and-Sum-Verfahrens als frequenzabhängige Einfallswinkel (φ1(ωk) und (φ2(ωk) für mehrere Frequenzbänder ωk (k = 1, 2, ...) optimiert werden.
PCT/DE2004/000450 2003-03-18 2004-03-08 Verfahren und vorrichtung zum entmischen akustischer signale WO2004083884A2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10312065.3 2003-03-18
DE2003112065 DE10312065B4 (de) 2003-03-18 2003-03-18 Verfahren und Vorrichtung zum Entmischen akustischer Signale

Publications (2)

Publication Number Publication Date
WO2004083884A2 WO2004083884A2 (de) 2004-09-30
WO2004083884A3 true WO2004083884A3 (de) 2005-01-27

Family

ID=33015910

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2004/000450 WO2004083884A2 (de) 2003-03-18 2004-03-08 Verfahren und vorrichtung zum entmischen akustischer signale

Country Status (2)

Country Link
DE (1) DE10312065B4 (de)
WO (1) WO2004083884A2 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8046219B2 (en) * 2007-10-18 2011-10-25 Motorola Mobility, Inc. Robust two microphone noise suppression system

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5353376A (en) * 1992-03-20 1994-10-04 Texas Instruments Incorporated System and method for improved speech acquisition for hands-free voice telecommunication in a noisy environment
EP0820210A3 (de) * 1997-08-20 1998-04-01 Phonak Ag Verfahren zur elektronischen Strahlformung von akustischen Signalen und akustisches Sensorgerät
KR100878992B1 (ko) * 2001-01-30 2009-01-15 톰슨 라이센싱 에스.에이. 지오메트릭 소스 분리 신호 처리 기술
CA2354858A1 (en) * 2001-08-08 2003-02-08 Dspfactory Ltd. Subband directional audio signal processing using an oversampled filterbank

Non-Patent Citations (6)

* Cited by examiner, † Cited by third party
Title
AAPO HYVÄRINEN: "Blind Source Separation by Nonstationarity of Variance: A Cumulant-Based Approach", IEEE TRANSACTIONS ON NEURAL NETWORKS, vol. 12, no. 6, November 2001 (2001-11-01), pages 1471 - 1474, XP002302155, Retrieved from the Internet <URL:http://www.cs.helsinki.fi/u/ahyvarin/papers/TNN01.pdf> [retrieved on 20041020] *
BAUMANN W ET AL: "Beamforming-based convolutive source separation", 2003 IEEE INTERNATIONAL CONFERENCE ON ACOUSTICS, SPEECH, AND SIGNAL PROCESSING. PROCEEDINGS. (ICASSP). HONG KONG, APRIL 6 - 10, 2003, IEEE INTERNATIONAL CONFERENCE ON ACOUSTICS, SPEECH, AND SIGNAL PROCESSING (ICASSP), NEW YORK, NY : IEEE, US, vol. VOL. 1 OF 6, 6 April 2003 (2003-04-06), pages V357 - V360, XP010639282, ISBN: 0-7803-7663-3 *
HIROSHI SARUWATARI ET AL: "Blind Source Separation for Speech Based on Fast-Convergence Algorithm with ICA and Beamforming", EUROSPEECH 2001 SCANDINAVIA, vol. 4, 3 September 2001 (2001-09-03), AALBORG, DENMARK, pages 2603 - 2606, XP007004927 *
JEAN-FRANÇOIS CARDOSO: "HIGH-ORDER CONTRASTS FOR INDEPENDENT COMPONENT ANALYSIS", NEURAL COMPUTATION, vol. 11, 1999, MASSACHUSETTS INSTITUTE OF TECHNOLOGY, pages 157 - 192, XP002302154, Retrieved from the Internet <URL:http://www.tsi.enst.fr/~cardoso/guidesepsou.html> [retrieved on 20041020] *
LUCAS C. PARRA: "An Introduction to Independent Component Analysis and Blind Source Separation", 25 April 1999 (1999-04-25), PRINCETON, NJ 08543, USA, pages 1 - 30, XP002302156, Retrieved from the Internet <URL:http://newton.bme.columbia.edu/~lparra/publish/princeton98.pdf> [retrieved on 20041020] *
PARRA L ET AL: "Convolutive blind separation of non-stationary sources", IEEE TRANSACTIONS ON SPEECH AND AUDIO PROCESSING, IEEE INC. NEW YORK, US, vol. 8, no. 3, May 2000 (2000-05-01), pages 320 - 327, XP002154443, ISSN: 1063-6676 *

Also Published As

Publication number Publication date
WO2004083884A2 (de) 2004-09-30
DE10312065A1 (de) 2004-10-21
DE10312065B4 (de) 2005-10-13

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