DE69940800D1 - Verfahren und Vorrichtung zur echounterdruckung - Google Patents
Verfahren und Vorrichtung zur echounterdruckungInfo
- Publication number
- DE69940800D1 DE69940800D1 DE69940800T DE69940800T DE69940800D1 DE 69940800 D1 DE69940800 D1 DE 69940800D1 DE 69940800 T DE69940800 T DE 69940800T DE 69940800 T DE69940800 T DE 69940800T DE 69940800 D1 DE69940800 D1 DE 69940800D1
- Authority
- DE
- Germany
- Prior art keywords
- echo
- printing
- echo printing
- 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
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
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Circuit For Audible Band Transducer (AREA)
- Telephone Function (AREA)
- Stereophonic System (AREA)
- Amplifiers (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019980047094A KR100283170B1 (ko) | 1998-11-04 | 1998-11-04 | 반향제거 장치 및 방법 |
Publications (1)
Publication Number | Publication Date |
---|---|
DE69940800D1 true DE69940800D1 (de) | 2009-06-10 |
Family
ID=19557100
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE69940800T Expired - Lifetime DE69940800D1 (de) | 1998-11-04 | 1999-11-04 | Verfahren und Vorrichtung zur echounterdruckung |
Country Status (5)
Country | Link |
---|---|
US (1) | US6771771B1 (de) |
EP (1) | EP0999689B1 (de) |
KR (1) | KR100283170B1 (de) |
CN (1) | CN1157995C (de) |
DE (1) | DE69940800D1 (de) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6487178B1 (en) * | 1999-05-12 | 2002-11-26 | Ericsson Inc. | Methods and apparatus for providing volume control in communicating systems including a linear echo canceler |
JP2002050986A (ja) * | 2000-08-03 | 2002-02-15 | Matsushita Electric Ind Co Ltd | エコーキャンセル方法及びエコーキャンセル装置 |
US20070047731A1 (en) * | 2005-08-31 | 2007-03-01 | Acoustic Technologies, Inc. | Clipping detector for echo cancellation |
JP4765117B2 (ja) * | 2006-03-02 | 2011-09-07 | オンセミコンダクター・トレーディング・リミテッド | エコー防止回路、フィルタ係数設定方法、及びプログラム |
CN102726013B (zh) * | 2011-03-14 | 2015-01-21 | 苏州全波通信技术有限公司 | 用于覆盖补点的同频转发器的回波消除系统及其方法 |
CN109823369B (zh) * | 2018-12-28 | 2020-09-04 | 上海鸣啸信息科技股份有限公司 | 一种基于Linux平台的列车乘客紧急报警器 |
KR102207608B1 (ko) | 2019-04-24 | 2021-01-26 | 윤종오 | 카르복실산으로 유기화된 규소 이온 복합체 및 복합체의 제조방법과 이를 이용한 제품 |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
US4991166A (en) * | 1988-10-28 | 1991-02-05 | Shure Brothers Incorporated | Echo reduction circuit |
US5016271A (en) | 1989-05-30 | 1991-05-14 | At&T Bell Laboratories | Echo canceler-suppressor speakerphone |
FR2676881A1 (fr) | 1991-05-21 | 1992-11-27 | Telecommunications Sa | Procede pour optimiser la qualite des communications telephoniques. |
US5857019A (en) | 1996-06-11 | 1999-01-05 | Siemens Business Communication Systems, Inc. | Apparatus and method for providing a telephone user with control of the threshold volume at which the user's voice will take control of a half-duplex speakerphone conversation |
US5796818A (en) | 1996-08-08 | 1998-08-18 | Northern Telecom Limited | Dynamic optimization of handsfree microphone gain |
US5787165A (en) * | 1996-12-13 | 1998-07-28 | Ericsson Inc. | Handsfree radiotelephone having dynamic path attenuation control for echo suppression |
US6147979A (en) * | 1997-08-12 | 2000-11-14 | Lucent Technologies, Inc. | System and method for echo cancellation in a communication system |
-
1998
- 1998-11-04 KR KR1019980047094A patent/KR100283170B1/ko not_active IP Right Cessation
-
1999
- 1999-11-04 CN CNB991235126A patent/CN1157995C/zh not_active Expired - Fee Related
- 1999-11-04 DE DE69940800T patent/DE69940800D1/de not_active Expired - Lifetime
- 1999-11-04 EP EP99121882A patent/EP0999689B1/de not_active Expired - Lifetime
- 1999-11-04 US US09/433,683 patent/US6771771B1/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
KR20000031185A (ko) | 2000-06-05 |
CN1157995C (zh) | 2004-07-14 |
US6771771B1 (en) | 2004-08-03 |
CN1255821A (zh) | 2000-06-07 |
KR100283170B1 (ko) | 2001-03-02 |
EP0999689A1 (de) | 2000-05-10 |
EP0999689B1 (de) | 2009-04-29 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8364 | No opposition during term of opposition |