CA2437477C - Methode et systeme pour traiter des signaux en sous-bande au moyen de filtres adaptatifs - Google Patents
Methode et systeme pour traiter des signaux en sous-bande au moyen de filtres adaptatifs Download PDFInfo
- Publication number
- CA2437477C CA2437477C CA002437477A CA2437477A CA2437477C CA 2437477 C CA2437477 C CA 2437477C CA 002437477 A CA002437477 A CA 002437477A CA 2437477 A CA2437477 A CA 2437477A CA 2437477 C CA2437477 C CA 2437477C
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- CA
- Canada
- Prior art keywords
- signal
- frequency domain
- adaptive filter
- subband
- adaptive
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- 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 - Fee Related
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/02—Details
- H04B3/20—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other
- H04B3/23—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other using a replica of transmitted signal in the time domain, e.g. echo cancellers
- H04B3/234—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other using a replica of transmitted signal in the time domain, e.g. echo cancellers using double talk detection
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H21/00—Adaptive networks
- H03H21/0012—Digital adaptive filters
-
- 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
- G10L25/00—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00
- G10L25/03—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00 characterised by the type of extracted parameters
- G10L25/18—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00 characterised by the type of extracted parameters the extracted parameters being spectral information of each sub-band
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H21/00—Adaptive networks
- H03H21/0012—Digital adaptive filters
- H03H21/0025—Particular filtering methods
- H03H2021/0041—Subband decomposition
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Abstract
La présente concerne une méthode et un système de traitement de signaux en sous-bande au moyen de filtres adaptatifs. Le système est mis en ouvre sur un banc de filtres WOLA suréchantillonné. Les signaux d'entrée sont suréchantillonnés. Le système comprend un filtre adaptatif pour chaque sous-bande, avec une fonction d'amélioration des propriétés de convergence du filtre adaptatif. Par exemple, la propriété de convergence est améliorée par le blanchiment du spectre des signaux en sous-bande suréchantillonnés et/ou au moyen d'un algorithme de projection affine. Le système permet de supprimer l'écho et/ou le bruit. Un contrôle adaptatif par paliers, un contrôle du processus d'adaptation au moyen d'un détecteur d'émission simultanée de parole, peut être implémenté. En outre, le système permet un traitement non adaptatif pour la réduction du bruit non corrélé et/ou l'annulation adaptative du bruit résistant à la diaphonie.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002437477A CA2437477C (fr) | 2002-08-16 | 2003-08-18 | Methode et systeme pour traiter des signaux en sous-bande au moyen de filtres adaptatifs |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002399159A CA2399159A1 (fr) | 2002-08-16 | 2002-08-16 | Amelioration de la convergence pour filtres adaptifs de sous-bandes surechantilonnees |
| CA2,399,159 | 2002-08-16 | ||
| CA002437477A CA2437477C (fr) | 2002-08-16 | 2003-08-18 | Methode et systeme pour traiter des signaux en sous-bande au moyen de filtres adaptatifs |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2437477A1 CA2437477A1 (fr) | 2004-02-16 |
| CA2437477C true CA2437477C (fr) | 2008-11-18 |
Family
ID=31947282
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002437477A Expired - Fee Related CA2437477C (fr) | 2002-08-16 | 2003-08-18 | Methode et systeme pour traiter des signaux en sous-bande au moyen de filtres adaptatifs |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2437477C (fr) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9131915B2 (en) | 2011-07-06 | 2015-09-15 | University Of New Brunswick | Method and apparatus for noise cancellation |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2424093A1 (fr) | 2003-03-31 | 2004-09-30 | Dspfactory Ltd. | Methode et dispositif de protection contre les chocs acoustiques |
| US7231234B2 (en) | 2003-11-21 | 2007-06-12 | Octasic Inc. | Method and apparatus for reducing echo in a communication system |
| EP1638079B8 (fr) * | 2004-09-15 | 2019-01-23 | GN Hearing A/S | Procédé et système pour la suppression active du bruit |
| US10911096B1 (en) | 2019-08-07 | 2021-02-02 | Samsung Electronics Co., Ltd | System and method for providing sub-band whitening in the presence of partial-band interference |
| CN111261182B (zh) * | 2020-05-07 | 2020-10-23 | 上海力声特医学科技有限公司 | 适用于人工耳蜗的风噪抑制方法及其系统 |
-
2003
- 2003-08-18 CA CA002437477A patent/CA2437477C/fr not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9131915B2 (en) | 2011-07-06 | 2015-09-15 | University Of New Brunswick | Method and apparatus for noise cancellation |
Also Published As
| Publication number | Publication date |
|---|---|
| CA2437477A1 (fr) | 2004-02-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |
Effective date: 20220301 |
|
| MKLA | Lapsed |
Effective date: 20200831 |