AU7968191A - Echo canceller with adaptive voice switch attenuation - Google Patents
Echo canceller with adaptive voice switch attenuationInfo
- Publication number
- AU7968191A AU7968191A AU79681/91A AU7968191A AU7968191A AU 7968191 A AU7968191 A AU 7968191A AU 79681/91 A AU79681/91 A AU 79681/91A AU 7968191 A AU7968191 A AU 7968191A AU 7968191 A AU7968191 A AU 7968191A
- Authority
- AU
- Australia
- Prior art keywords
- echo canceller
- voice switch
- adaptive voice
- switch attenuation
- attenuation
- 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.)
- Abandoned
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
- H04B3/20—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
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9013751 | 1990-06-20 | ||
GB9013751A GB2245459A (en) | 1990-06-20 | 1990-06-20 | Echo canceller with adaptive voice switch attenuation |
Publications (1)
Publication Number | Publication Date |
---|---|
AU7968191A true AU7968191A (en) | 1992-01-07 |
Family
ID=10677919
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AU79681/91A Abandoned AU7968191A (en) | 1990-06-20 | 1991-06-19 | Echo canceller with adaptive voice switch attenuation |
Country Status (4)
Country | Link |
---|---|
AU (1) | AU7968191A (fr) |
GB (1) | GB2245459A (fr) |
IE (1) | IE912102A1 (fr) |
WO (1) | WO1991020149A1 (fr) |
Families Citing this family (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5157653A (en) * | 1990-08-03 | 1992-10-20 | Coherent Communications Systems Corp. | Residual echo elimination with proportionate noise injection |
US5263019A (en) * | 1991-01-04 | 1993-11-16 | Picturetel Corporation | Method and apparatus for estimating the level of acoustic feedback between a loudspeaker and microphone |
FI89756C (fi) * | 1991-11-04 | 1993-11-10 | Nokia Telecommunications Oy | Foerfarande foer olineaer signalbehandling i en ekoslaeckare |
ES2101633B1 (es) * | 1994-05-31 | 1998-03-01 | Alcatel Standard Electrica | Terminal celular fijo para servicios de telecomunicaciones a dos hilos. |
JPH0832494A (ja) * | 1994-07-13 | 1996-02-02 | Mitsubishi Electric Corp | ハンズフリー通話装置 |
ES2101638B1 (es) * | 1994-09-30 | 1998-03-01 | Alcatel Standard Electrica | Terminal celular fijo para servicios de telecomunicaciones a dos hilos. |
US5835851A (en) * | 1995-01-19 | 1998-11-10 | Ericsson Inc. | Method and apparatus for echo reduction in a hands-free cellular radio using added noise frames |
JP2928130B2 (ja) * | 1995-04-19 | 1999-08-03 | 埼玉日本電気株式会社 | ハンズフリー通信装置 |
FR2748174B1 (fr) * | 1996-04-30 | 1998-06-26 | Sagem | Poste telephonique mains-libres |
DE19639580C2 (de) * | 1996-09-26 | 1998-09-17 | Deutsche Telekom Ag | Vorrichtung zur Reduktion akustischer Echos |
JP4261622B2 (ja) * | 1997-01-23 | 2009-04-30 | モトローラ・インコーポレイテッド | 通信システムにおける非線形処理装置および方法 |
JP3597671B2 (ja) * | 1997-05-16 | 2004-12-08 | 三菱電機株式会社 | ハンズフリー電話機 |
US6580793B1 (en) | 1999-08-31 | 2003-06-17 | Lucent Technologies Inc. | Method and apparatus for echo cancellation with self-deactivation |
JP3576430B2 (ja) | 1999-09-01 | 2004-10-13 | 沖電気工業株式会社 | 自動利得制御器 |
US6507653B1 (en) * | 2000-04-14 | 2003-01-14 | Ericsson Inc. | Desired voice detection in echo suppression |
DE10030926A1 (de) * | 2000-06-24 | 2002-01-03 | Alcatel Sa | Störsignalabhängige adaptive Echounterdrückung |
US6622030B1 (en) * | 2000-06-29 | 2003-09-16 | Ericsson Inc. | Echo suppression using adaptive gain based on residual echo energy |
FR2816791A1 (fr) * | 2000-11-15 | 2002-05-17 | Atlinks | Procede pour limiter les echos dans un poste telephonique a haut parleur et poste telephonique utilisant ce procede |
JP4282260B2 (ja) | 2001-11-20 | 2009-06-17 | 株式会社リコー | エコーキャンセラ |
US9973633B2 (en) | 2014-11-17 | 2018-05-15 | At&T Intellectual Property I, L.P. | Pre-distortion system for cancellation of nonlinear distortion in mobile devices |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4346261A (en) * | 1980-03-17 | 1982-08-24 | United Networks, Inc. | Speaker phones |
JPS6041849A (ja) * | 1983-08-18 | 1985-03-05 | Toshiba Corp | 拡声電話 |
FR2612029B1 (fr) * | 1987-03-03 | 1989-05-12 | Connan Jean Louis | Dispositif pour la realisation de la fonction " mains-libres " dans un poste telephonique, associant les fonctions de commutation de gain et d'annulation d'echo |
-
1990
- 1990-06-20 GB GB9013751A patent/GB2245459A/en not_active Withdrawn
-
1991
- 1991-06-19 IE IE210291A patent/IE912102A1/en unknown
- 1991-06-19 WO PCT/EP1991/001130 patent/WO1991020149A1/fr unknown
- 1991-06-19 AU AU79681/91A patent/AU7968191A/en not_active Abandoned
Also Published As
Publication number | Publication date |
---|---|
GB9013751D0 (en) | 1990-08-08 |
WO1991020149A1 (fr) | 1991-12-26 |
GB2245459A (en) | 1992-01-02 |
IE912102A1 (en) | 1992-01-01 |
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