EP0615226B1 - Procédé de réduction de bruit pour canaux de parole perturbés - Google Patents
Procédé de réduction de bruit pour canaux de parole perturbés Download PDFInfo
- 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
Links
- 238000000034 method Methods 0.000 title claims description 25
- 230000009467 reduction Effects 0.000 title claims description 10
- 238000009499 grossing Methods 0.000 claims description 10
- 230000003595 spectral effect Effects 0.000 claims description 10
- 230000003044 adaptive effect Effects 0.000 claims description 8
- 238000012937 correction Methods 0.000 claims description 4
- 238000001228 spectrum Methods 0.000 claims description 4
- 238000001914 filtration Methods 0.000 claims description 3
- 230000002238 attenuated effect Effects 0.000 claims 3
- 238000006073 displacement reaction Methods 0.000 claims 1
- 238000012545 processing Methods 0.000 description 5
- 238000012935 Averaging Methods 0.000 description 4
- 238000012805 post-processing Methods 0.000 description 4
- 230000004044 response Effects 0.000 description 4
- 230000009466 transformation Effects 0.000 description 3
- 230000006872 improvement Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 230000010363 phase shift Effects 0.000 description 2
- 230000002123 temporal effect Effects 0.000 description 2
- 101000822695 Clostridium perfringens (strain 13 / Type A) Small, acid-soluble spore protein C1 Proteins 0.000 description 1
- 101000655262 Clostridium perfringens (strain 13 / Type A) Small, acid-soluble spore protein C2 Proteins 0.000 description 1
- 101000655256 Paraclostridium bifermentans Small, acid-soluble spore protein alpha Proteins 0.000 description 1
- 101000655264 Paraclostridium bifermentans Small, acid-soluble spore protein beta Proteins 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 238000003491 array Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 230000000875 corresponding effect Effects 0.000 description 1
- 238000007791 dehumidification Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
Images
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)
- 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 queau 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, etle 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.
- Procédé selon la revendication 1, caractérisé en ce quela 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, eten 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.
- 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.
- 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.
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)
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)
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)
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 |
-
1993
- 1993-03-11 DE DE4307688A patent/DE4307688A1/de not_active Withdrawn
-
1994
- 1994-02-28 EP EP94102963A patent/EP0615226B1/fr not_active Expired - Lifetime
- 1994-02-28 DE DE59408194T patent/DE59408194D1/de not_active Expired - Lifetime
Cited By (1)
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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