BR9800430A - Método para supressão de eco e supressor de eco para executar um tal processo - Google Patents
Método para supressão de eco e supressor de eco para executar um tal processoInfo
- Publication number
- BR9800430A BR9800430A BR9800430A BR9800430A BR9800430A BR 9800430 A BR9800430 A BR 9800430A BR 9800430 A BR9800430 A BR 9800430A BR 9800430 A BR9800430 A BR 9800430A BR 9800430 A BR9800430 A BR 9800430A
- Authority
- BR
- Brazil
- Prior art keywords
- signal
- echo
- observation
- spectral components
- prediction
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M9/00—Arrangements for interconnection not involving centralised switching
- H04M9/08—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic
- H04M9/082—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic using echo cancellers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/02—Details
- H04B3/32—Reducing cross-talk, e.g. by compensating
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Filters That Use Time-Delay Elements (AREA)
- Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9700575A FR2758677B1 (fr) | 1997-01-21 | 1997-01-21 | Procede d'annulation d'echo et annuleur d'echo mettant en oeuvre un tel procede |
Publications (1)
Publication Number | Publication Date |
---|---|
BR9800430A true BR9800430A (pt) | 1999-06-15 |
Family
ID=9502802
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BR9800430A BR9800430A (pt) | 1997-01-21 | 1998-01-21 | Método para supressão de eco e supressor de eco para executar um tal processo |
Country Status (10)
Country | Link |
---|---|
US (1) | US6108413A (pt) |
EP (1) | EP0854626B1 (pt) |
KR (1) | KR100299290B1 (pt) |
CN (1) | CN1193226A (pt) |
AT (1) | ATE273593T1 (pt) |
AU (1) | AU714446B2 (pt) |
BR (1) | BR9800430A (pt) |
CA (1) | CA2227480C (pt) |
DE (1) | DE69825503D1 (pt) |
FR (1) | FR2758677B1 (pt) |
Families Citing this family (24)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19806015C2 (de) * | 1998-02-13 | 1999-12-23 | Siemens Ag | Verfahren zur Verbesserung der akustischen Rückhördämpfung in Freisprecheinrichtungen |
EP1110155A1 (en) * | 1998-09-03 | 2001-06-27 | Conexant Systems, Inc. | A method of frequency domain filtering employing a real to analytic transform |
US6658107B1 (en) * | 1998-10-23 | 2003-12-02 | Telefonaktiebolaget Lm Ericsson (Publ) | Methods and apparatus for providing echo suppression using frequency domain nonlinear processing |
US6473409B1 (en) * | 1999-02-26 | 2002-10-29 | Microsoft Corp. | Adaptive filtering system and method for adaptively canceling echoes and reducing noise in digital signals |
US6510224B1 (en) * | 1999-05-20 | 2003-01-21 | Telefonaktiebolaget L M Ericsson | Enhancement of near-end voice signals in an echo suppression system |
US6269161B1 (en) * | 1999-05-20 | 2001-07-31 | Signalworks, Inc. | System and method for near-end talker detection by spectrum analysis |
US6278785B1 (en) * | 1999-09-21 | 2001-08-21 | Acoustic Technologies, Inc. | Echo cancelling process with improved phase control |
CA2289275A1 (en) * | 1999-11-10 | 2001-05-10 | Yatish Kumar | A system and method for echo cancellation |
GB2356328B (en) * | 1999-11-11 | 2002-10-30 | Motorola Israel Ltd | Echo suppression and echo cancellation |
US6650701B1 (en) * | 2000-01-14 | 2003-11-18 | Vtel Corporation | Apparatus and method for controlling an acoustic echo canceler |
US6731747B2 (en) | 2001-02-23 | 2004-05-04 | Skyworks Solutions, Inc. | Signal detector with echo cancellation |
KR20040030817A (ko) * | 2001-07-20 | 2004-04-09 | 코닌클리즈케 필립스 일렉트로닉스 엔.브이. | 통신 시스템, 에코 제거 수단 및 에코 제거 방법 |
US6879922B2 (en) * | 2001-09-19 | 2005-04-12 | General Electric Company | Systems and methods for suppressing pressure waves using corrective signal |
US7155018B1 (en) * | 2002-04-16 | 2006-12-26 | Microsoft Corporation | System and method facilitating acoustic echo cancellation convergence detection |
JP4161628B2 (ja) * | 2002-07-19 | 2008-10-08 | 日本電気株式会社 | エコー抑圧方法及び装置 |
US7672445B1 (en) * | 2002-11-15 | 2010-03-02 | Fortemedia, Inc. | Method and system for nonlinear echo suppression |
EP1463246A1 (en) * | 2003-03-27 | 2004-09-29 | Motorola Inc. | Communication of conversational data between terminals over a radio link |
US7054437B2 (en) * | 2003-06-27 | 2006-05-30 | Nokia Corporation | Statistical adaptive-filter controller |
US7352858B2 (en) * | 2004-06-30 | 2008-04-01 | Microsoft Corporation | Multi-channel echo cancellation with round robin regularization |
WO2006077005A2 (fr) * | 2005-01-19 | 2006-07-27 | France Telecom | Dispositif d'annulation d'echo acoustique, procede et programme d'ordinateur correspondants |
EP1940139B1 (fr) * | 2006-12-28 | 2013-05-22 | France Telecom | Commande de filtres d'annulation d'écho |
US8724798B2 (en) * | 2009-11-20 | 2014-05-13 | Adobe Systems Incorporated | System and method for acoustic echo cancellation using spectral decomposition |
US9613634B2 (en) * | 2014-06-19 | 2017-04-04 | Yang Gao | Control of acoustic echo canceller adaptive filter for speech enhancement |
CN106296609B (zh) * | 2016-08-09 | 2023-09-12 | 广东盈动高科自动化有限公司 | 用于容栅的全波和数字滤波去噪方法和电路 |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2628918B1 (fr) * | 1988-03-15 | 1990-08-10 | France Etat | Dispositif annuleur d'echo a filtrage en sous-bandes de frequence |
US5418849A (en) * | 1988-12-21 | 1995-05-23 | Siemens Telecomunicazioni S.P.A. | Procedure and device for adaptive digital cancellation of the echo generated in telephone connections with time-variant characteristics |
US5163044A (en) * | 1991-01-02 | 1992-11-10 | At&T Bell Laboratories | Use of a fractionally spaced equalizer to perform echo cancellation in a full-duplex modem |
US5305307A (en) * | 1991-01-04 | 1994-04-19 | Picturetel Corporation | Adaptive acoustic echo canceller having means for reducing or eliminating echo in a plurality of signal bandwidths |
EP0667700B1 (en) * | 1994-02-10 | 2004-01-07 | Nippon Telegraph And Telephone Corporation | Echo cancelling method and apparatus using fast projection scheme |
FR2729024A1 (fr) * | 1994-12-30 | 1996-07-05 | Matra Communication | Annuleur d'echo acoustique avec filtrage en sous-bandes |
FR2729804B1 (fr) * | 1995-01-24 | 1997-04-04 | Matra Communication | Annuleur d'echo acoustique a filtre adaptatif et passage dans le domaine frequentiel |
US5898928A (en) * | 1996-02-29 | 1999-04-27 | Telefonaktiebolaget Lm Ericsson | Adaptive frequency allocation in a telecommunication system |
US5721782A (en) * | 1996-03-25 | 1998-02-24 | Motorola, Inc. | Partitioned echo canceler utilizing decimation echo location |
US5856970A (en) * | 1996-08-05 | 1999-01-05 | Motorola, Inc. | Multi-channel echo cancellation method and apparatus |
US5933797A (en) * | 1997-02-28 | 1999-08-03 | Telefonaktiebolaget Lm Ericsson (Publ) | Adaptive dual filter echo cancellation |
-
1997
- 1997-01-21 FR FR9700575A patent/FR2758677B1/fr not_active Expired - Fee Related
-
1998
- 1998-01-15 US US09/007,836 patent/US6108413A/en not_active Expired - Lifetime
- 1998-01-19 EP EP98400090A patent/EP0854626B1/fr not_active Expired - Lifetime
- 1998-01-19 DE DE69825503T patent/DE69825503D1/de not_active Expired - Lifetime
- 1998-01-19 AT AT98400090T patent/ATE273593T1/de not_active IP Right Cessation
- 1998-01-20 KR KR1019980001568A patent/KR100299290B1/ko not_active IP Right Cessation
- 1998-01-20 CA CA002227480A patent/CA2227480C/en not_active Expired - Fee Related
- 1998-01-20 AU AU52133/98A patent/AU714446B2/en not_active Ceased
- 1998-01-20 CN CN98104328A patent/CN1193226A/zh active Pending
- 1998-01-21 BR BR9800430A patent/BR9800430A/pt not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
KR100299290B1 (ko) | 2001-09-22 |
EP0854626A1 (fr) | 1998-07-22 |
ATE273593T1 (de) | 2004-08-15 |
AU714446B2 (en) | 2000-01-06 |
US6108413A (en) | 2000-08-22 |
CA2227480A1 (en) | 1998-07-21 |
AU5213398A (en) | 1998-07-23 |
CN1193226A (zh) | 1998-09-16 |
CA2227480C (en) | 2001-12-18 |
KR19980070640A (ko) | 1998-10-26 |
DE69825503D1 (de) | 2004-09-16 |
EP0854626B1 (fr) | 2004-08-11 |
FR2758677A1 (fr) | 1998-07-24 |
FR2758677B1 (fr) | 1999-04-02 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
B08F | Application dismissed because of non-payment of annual fees [chapter 8.6 patent gazette] |
Free format text: REFERENTE A 5A,6A,7A E 8A ANUIDADES. |
|
B08K | Patent lapsed as no evidence of payment of the annual fee has been furnished to inpi [chapter 8.11 patent gazette] |
Free format text: REFERENTE AO DESPACHO 8.6 PUBLICADO NA RPI 1860 DE 29/08/2006. |