EP0615226B1 - Procédé de réduction de bruit pour canaux de parole perturbés - Google Patents

Procédé de réduction de bruit pour canaux de parole perturbés Download PDF

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Publication number
EP0615226B1
EP0615226B1 EP94102963A EP94102963A EP0615226B1 EP 0615226 B1 EP0615226 B1 EP 0615226B1 EP 94102963 A EP94102963 A EP 94102963A EP 94102963 A EP94102963 A EP 94102963A EP 0615226 B1 EP0615226 B1 EP 0615226B1
Authority
EP
European Patent Office
Prior art keywords
channels
disturbance
speech
individual
attenuated
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.)
Expired - Lifetime
Application number
EP94102963A
Other languages
German (de)
English (en)
Other versions
EP0615226A2 (fr
EP0615226A3 (en
Inventor
Klaus Dr. Ing. 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
DaimlerChrysler 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 DaimlerChrysler AG filed Critical DaimlerChrysler AG
Publication of EP0615226A2 publication Critical patent/EP0615226A2/fr
Publication of EP0615226A3 publication Critical patent/EP0615226A3/de
Application granted granted Critical
Publication of EP0615226B1 publication Critical patent/EP0615226B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L21/00—Speech or voice signal processing techniques 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 TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L21/00—Speech or voice signal processing techniques 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
    • G10L2021/02166—Microphone arrays; Beamforming

Landscapes

  • Engineering & Computer Science (AREA)
  • Computational Linguistics (AREA)
  • Quality & Reliability (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Circuit For Audible Band Transducer (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)

Claims (4)

  1. Procédé de réduction de bruit d'au moins deux canaux de parole perturbés, les canaux de parole perturbés étant réunis en un canal de sortie, caractérisé en ce que
    au moyen de filtres directifs numériques (HR1, HR2) et d'une estimation de phase linéaire pour les différents canaux, un diagramme acoustique pivotant est généré (HALLP), qui suit le mouvement de la personne qui parle et les sources parasites spatiales sont ainsi amorties,
    dans les différents canaux, au cours des pauses de parole, la perturbation est estimée et par soustraction spectrale (HSPS1, HSPS2), les sources parasites stationnaires temporellement sont amorties,
    les différents canaux de parole sont ensuite additionnés, et ainsi les perturbations statiques de la soustraction spectrale sont moyennées, et
    le signal somme est post-traité à l'aide d'une fonction de cohérence modifiée (HKKF) et ainsi les composantes parasites et d'écho diffuses sont amorties.
  2. Procédé selon la revendication 1, caractérisé en ce que
    la soustraction spectrale est effectuée avec deux constantes de filtrage adaptatives α, β,
    en ce qu'avec la première constante de filtrage adaptative β, le spectre parasite Snn est évalué, et
    en ce qu'avec les secondes constantes de filtrage adaptatives α, la densité de puissance Sxx des différents canaux est fortement filtrée au cours des pauses de parole et faiblement filtrée durant la parole.
  3. Procédé selon la revendication 1, caractérisé en ce que le déphasage linéaire d'au moins deux signaux est détecté par l'intermédiaire d'un nombre déterminé de maxima de la densité de puissance croisée dans la zone de fréquence.
  4. Procédé selon la revendication 1, caractérisé en ce que la correction de phase, le filtrage directif et un filtrage inverse éventuellement nécessaires sont effectués dans la zone de fréquence.
EP94102963A 1993-03-11 1994-02-28 Procédé de réduction de bruit pour canaux de parole perturbés Expired - Lifetime EP0615226B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4307688 1993-03-11
DE4307688A DE4307688A1 (de) 1993-03-11 1993-03-11 Verfahren zur Geräuschreduktion für gestörte Sprachkanäle

Publications (3)

Publication Number Publication Date
EP0615226A2 EP0615226A2 (fr) 1994-09-14
EP0615226A3 EP0615226A3 (en) 1995-08-23
EP0615226B1 true EP0615226B1 (fr) 1999-05-06

Family

ID=6482502

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94102963A Expired - Lifetime EP0615226B1 (fr) 1993-03-11 1994-02-28 Procédé de réduction de bruit pour canaux de parole perturbés

Country Status (2)

Country Link
EP (1) EP0615226B1 (fr)
DE (2) DE4307688A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10118653C2 (de) * 2001-04-14 2003-03-27 Daimler Chrysler Ag Verfahren zur Geräuschreduktion

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19629132A1 (de) 1996-07-19 1998-01-22 Daimler Benz Ag Verfahren zur Verringerung von Störungen eines Sprachsignals
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
DE10120231A1 (de) * 2001-04-19 2002-10-24 Deutsche Telekom Ag Verfahren und Anordnung zur einkanaligen Geräuschreduktion für gestörte Sprachsignale
DE60106239T2 (de) * 2001-08-21 2005-10-20 Culturecom Technology (Macau) Ltd. Verfahren und Vorrichtung zur Verarbeitung eines akustischen Signals
EP3067886A1 (fr) * 2015-03-09 2016-09-14 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Codeur audio de signal multicanal et décodeur audio de signal audio codé

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4066842A (en) * 1977-04-27 1978-01-03 Bell Telephone Laboratories, Incorporated Method and apparatus for cancelling room reverberation and noise pickup
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
JPS5715597A (en) * 1980-07-02 1982-01-26 Nippon Gakki Seizo Kk Microphone device
US4653102A (en) * 1985-11-05 1987-03-24 Position Orientation Systems Directional microphone system
US4811404A (en) * 1987-10-01 1989-03-07 Motorola, Inc. Noise suppression system
JPH01118900A (ja) * 1987-11-01 1989-05-11 Ricoh Co Ltd 雑音抑圧装置
DE4012349A1 (de) * 1989-04-19 1990-10-25 Ricoh Kk Einrichtung zum beseitigen von geraeuschen
GB8911153D0 (en) * 1989-05-16 1989-09-20 Smiths Industries Plc Speech recognition apparatus and methods
US5267323A (en) * 1989-12-29 1993-11-30 Pioneer Electronic Corporation Voice-operated remote control system
DE4106405C2 (de) * 1990-03-23 1996-02-29 Ricoh Kk Geräuschunterdrückungseinrichtung für ein Spracherkennungsystem

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10118653C2 (de) * 2001-04-14 2003-03-27 Daimler Chrysler Ag Verfahren zur Geräuschreduktion

Also Published As

Publication number Publication date
EP0615226A2 (fr) 1994-09-14
DE4307688A1 (de) 1994-09-15
EP0615226A3 (en) 1995-08-23
DE59408194D1 (de) 1999-06-10

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