EP0612059A2 - Méthode pour estimer le temps de propagation dans des canaux vocaux perturbés - Google Patents

Méthode pour estimer le temps de propagation dans des canaux vocaux perturbés Download PDF

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Publication number
EP0612059A2
EP0612059A2 EP93120010A EP93120010A EP0612059A2 EP 0612059 A2 EP0612059 A2 EP 0612059A2 EP 93120010 A EP93120010 A EP 93120010A EP 93120010 A EP93120010 A EP 93120010A EP 0612059 A2 EP0612059 A2 EP 0612059A2
Authority
EP
European Patent Office
Prior art keywords
phase
determined
signals
estimated
maxima
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
EP93120010A
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German (de)
English (en)
Other versions
EP0612059B1 (fr
EP0612059A3 (en
Inventor
Klaus Dr.- Linhard
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mercedes Benz Group AG
Original Assignee
Daimler Benz AG
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 Daimler Benz AG filed Critical Daimler Benz AG
Publication of EP0612059A2 publication Critical patent/EP0612059A2/fr
Publication of EP0612059A3 publication Critical patent/EP0612059A3/de
Application granted granted Critical
Publication of EP0612059B1 publication Critical patent/EP0612059B1/fr
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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
    • G10L21/0208—Noise filtering
    • 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

Definitions

  • An important aspect of multi-channel processing is the estimation of the runtime difference between the individual channels. If the time difference is known, the direction of the sound event (speaker) can be determined. The signals of the individual channels can be corrected accordingly and processed further. E.g. If uncorrected signals are combined to form a sum signal, individual spectral components of the signal can be amplified, attenuated or canceled by interference.
  • the runtime is determined in the frequency domain. This enables a simple runtime correction by multiplying the spectrum by the new phase and leads to a low computing effort.
  • the microphone signals x and y are transformed into the frequency range (FFT, Fast Fourier Transformation).
  • the transformed segments X l (i) and Y l (i) resulted.
  • the segments are half overlapped and weighted with a hanning window. (The sampling rate of the signals x and y is 12 kHz.)
  • a "simulated impulse response" S I is calculated via an impulse monitor.
  • the smoothing of the phase value "from the beginning of the word into the word" can be adjusted with ⁇ .
  • S I, 1 (l - ⁇ ) S I, l-1 + ⁇ S B, l (7)
  • an adaptive smoothing constant h is calculated using a noise monitor. This smoothing constant results in an estimate S N for the disturbance. If spectral subtraction (SPS) was carried out beforehand, S N is an estimate of the residual interference.
  • SPS spectral subtraction
EP93120010A 1992-12-23 1993-12-11 Méthode pour estimer le temps de propagation dans des canaux vocaux perturbés Expired - Lifetime EP0612059B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4243831 1992-12-23
DE4243831A DE4243831A1 (de) 1992-12-23 1992-12-23 Verfahren zur Laufzeitschätzung an gestörten Sprachkanälen

Publications (3)

Publication Number Publication Date
EP0612059A2 true EP0612059A2 (fr) 1994-08-24
EP0612059A3 EP0612059A3 (en) 1995-08-16
EP0612059B1 EP0612059B1 (fr) 1999-03-17

Family

ID=6476383

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93120010A Expired - Lifetime EP0612059B1 (fr) 1992-12-23 1993-12-11 Méthode pour estimer le temps de propagation dans des canaux vocaux perturbés

Country Status (3)

Country Link
US (1) US5479517A (fr)
EP (1) EP0612059B1 (fr)
DE (2) DE4243831A1 (fr)

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JPH09212196A (ja) * 1996-01-31 1997-08-15 Nippon Telegr & Teleph Corp <Ntt> 雑音抑圧装置
DE19813285B4 (de) * 1998-03-26 2005-12-01 Bayerische Motoren Werke Ag Verfahren zur automatischen Messung der Sprachverständlichkeit in Kraftfahrzeugen
US7117149B1 (en) * 1999-08-30 2006-10-03 Harman Becker Automotive Systems-Wavemakers, Inc. Sound source classification
DE19942868A1 (de) * 1999-09-08 2001-03-15 Volkswagen Ag Verfahren zum Betrieb einer Mehrfachmikrofonanordnung in einem Kraftfahrzeug sowie Mehrfachmikrofonanordnung selbst
DE19955156A1 (de) * 1999-11-17 2001-06-21 Univ Karlsruhe Verfahren und Vorrichtung zur Unterdrückung eines Störsignalanteils im Ausgangssignal eines Schallwandlermittels
DE10118653C2 (de) * 2001-04-14 2003-03-27 Daimler Chrysler Ag Verfahren zur Geräuschreduktion
GB2391322B (en) * 2002-07-31 2005-12-14 British Broadcasting Corp Signal comparison method and apparatus
US8271279B2 (en) 2003-02-21 2012-09-18 Qnx Software Systems Limited Signature noise removal
US8073689B2 (en) 2003-02-21 2011-12-06 Qnx Software Systems Co. Repetitive transient noise removal
US7725315B2 (en) 2003-02-21 2010-05-25 Qnx Software Systems (Wavemakers), Inc. Minimization of transient noises in a voice signal
US7885420B2 (en) 2003-02-21 2011-02-08 Qnx Software Systems Co. Wind noise suppression system
US7949522B2 (en) 2003-02-21 2011-05-24 Qnx Software Systems Co. System for suppressing rain noise
US7895036B2 (en) 2003-02-21 2011-02-22 Qnx Software Systems Co. System for suppressing wind noise
US8326621B2 (en) 2003-02-21 2012-12-04 Qnx Software Systems Limited Repetitive transient noise removal
KR20070007851A (ko) * 2004-04-28 2007-01-16 마츠시타 덴끼 산교 가부시키가이샤 계층 부호화 장치 및 계층 부호화 방법
US8170879B2 (en) 2004-10-26 2012-05-01 Qnx Software Systems Limited Periodic signal enhancement system
US7610196B2 (en) 2004-10-26 2009-10-27 Qnx Software Systems (Wavemakers), Inc. Periodic signal enhancement system
US7949520B2 (en) 2004-10-26 2011-05-24 QNX Software Sytems Co. Adaptive filter pitch extraction
US8306821B2 (en) 2004-10-26 2012-11-06 Qnx Software Systems Limited Sub-band periodic signal enhancement system
US7716046B2 (en) 2004-10-26 2010-05-11 Qnx Software Systems (Wavemakers), Inc. Advanced periodic signal enhancement
US7680652B2 (en) 2004-10-26 2010-03-16 Qnx Software Systems (Wavemakers), Inc. Periodic signal enhancement system
US8543390B2 (en) 2004-10-26 2013-09-24 Qnx Software Systems Limited Multi-channel periodic signal enhancement system
US8284947B2 (en) * 2004-12-01 2012-10-09 Qnx Software Systems Limited Reverberation estimation and suppression system
US8027833B2 (en) * 2005-05-09 2011-09-27 Qnx Software Systems Co. System for suppressing passing tire hiss
US8170875B2 (en) 2005-06-15 2012-05-01 Qnx Software Systems Limited Speech end-pointer
US8311819B2 (en) 2005-06-15 2012-11-13 Qnx Software Systems Limited System for detecting speech with background voice estimates and noise estimates
US7844453B2 (en) 2006-05-12 2010-11-30 Qnx Software Systems Co. Robust noise estimation
US8326620B2 (en) 2008-04-30 2012-12-04 Qnx Software Systems Limited Robust downlink speech and noise detector
US8335685B2 (en) 2006-12-22 2012-12-18 Qnx Software Systems Limited Ambient noise compensation system robust to high excitation noise
US8850154B2 (en) 2007-09-11 2014-09-30 2236008 Ontario Inc. Processing system having memory partitioning
US8904400B2 (en) 2007-09-11 2014-12-02 2236008 Ontario Inc. Processing system having a partitioning component for resource partitioning
US8694310B2 (en) 2007-09-17 2014-04-08 Qnx Software Systems Limited Remote control server protocol system
US8209514B2 (en) 2008-02-04 2012-06-26 Qnx Software Systems Limited Media processing system having resource partitioning
EP2249333B1 (fr) * 2009-05-06 2014-08-27 Nuance Communications, Inc. Procédé et appareil d'évaluation d'une fréquence fondamentale d'un signal vocal
CN114859308A (zh) * 2022-07-11 2022-08-05 陕西昱琛航空设备股份有限公司 一种雷达目标模拟器及其校准方法

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US4254417A (en) * 1979-08-20 1981-03-03 The United States Of America As Represented By The Secretary Of The Navy Beamformer for arrays with rotational symmetry
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DE3531230A1 (de) * 1985-08-31 1987-03-05 Krupp Gmbh Verfahren zur detektion von fahrzeugen
US4912767A (en) * 1988-03-14 1990-03-27 International Business Machines Corporation Distributed noise cancellation system
JP2791036B2 (ja) * 1988-04-23 1998-08-27 キヤノン株式会社 音声処理装置
JPH0272398A (ja) * 1988-09-07 1990-03-12 Hitachi Ltd 音声信号用前処理装置
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Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4112430A (en) * 1977-06-01 1978-09-05 The United States Of America As Represented By The Secretary Of The Navy Beamformer for wideband signals
US4333170A (en) * 1977-11-21 1982-06-01 Northrop Corporation Acoustical detection and tracking system
US4254417A (en) * 1979-08-20 1981-03-03 The United States Of America As Represented By The Secretary Of The Navy Beamformer for arrays with rotational symmetry

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
INTERNATIONAL CONFERENCE ON ACOUSTICS, SPEECH, AND SIGNAL PROCESSING 1988, Bd. 5, 11.April 1988 - 14.April 1988 NEW YORK, NY, US, Seiten 2578-2581, ZELINSKI 'A microphone array with adaptive post-filtering for noise reduction in reverberant rooms' *
ITG-FACHTAGUNG: DIGITALE SPRACHVERARBEITUNG, 26.August 1988 - 28.August 1988 BAD NAUHEIM, Seiten 69-73, SCHLANG 'Ein Verfahren zur automatischen Ermittlung der Sprecherposition bei Freisprechen' *

Also Published As

Publication number Publication date
DE59309463D1 (de) 1999-04-22
EP0612059B1 (fr) 1999-03-17
US5479517A (en) 1995-12-26
DE4243831A1 (de) 1994-06-30
EP0612059A3 (en) 1995-08-16

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