NO310008B1 - FremgangsmÕte og anordning ved ekko-kansellering med en flerhet av kaskadekoblede adaptive filtre - Google Patents
FremgangsmÕte og anordning ved ekko-kansellering med en flerhet av kaskadekoblede adaptive filtre Download PDFInfo
- Publication number
- NO310008B1 NO310008B1 NO954557A NO954557A NO310008B1 NO 310008 B1 NO310008 B1 NO 310008B1 NO 954557 A NO954557 A NO 954557A NO 954557 A NO954557 A NO 954557A NO 310008 B1 NO310008 B1 NO 310008B1
- Authority
- NO
- Norway
- Prior art keywords
- echo
- signal
- filters
- filter
- quality
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims description 15
- 230000003044 adaptive effect Effects 0.000 title claims description 8
- 230000004044 response Effects 0.000 claims description 13
- 230000008901 benefit Effects 0.000 claims description 3
- 230000008569 process Effects 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims 1
- 238000002592 echocardiography Methods 0.000 description 12
- 238000002161 passivation Methods 0.000 description 3
- 230000001934 delay Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 210000000056 organ Anatomy 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005755 formation reaction Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
Classifications
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Filters That Use Time-Delay Elements (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE9301666A SE501248C2 (sv) | 1993-05-14 | 1993-05-14 | Metod och ekosläckare för ekoutsläckning med ett antal kaskadkopplade adaptiva filter |
| PCT/SE1994/000397 WO1994027378A1 (en) | 1993-05-14 | 1994-05-02 | A method and echo canceller for echo cancellation with a number of cascade-connected adaptive filters |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| NO954557D0 NO954557D0 (no) | 1995-11-13 |
| NO954557L NO954557L (no) | 1996-01-12 |
| NO310008B1 true NO310008B1 (no) | 2001-04-30 |
Family
ID=20389944
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NO954557A NO310008B1 (no) | 1993-05-14 | 1995-11-13 | FremgangsmÕte og anordning ved ekko-kansellering med en flerhet av kaskadekoblede adaptive filtre |
Country Status (12)
| Country | Link |
|---|---|
| US (1) | US5428605A (sv) |
| EP (1) | EP0698317B1 (sv) |
| CN (1) | CN1038889C (sv) |
| AU (1) | AU677335B2 (sv) |
| BR (1) | BR9406402A (sv) |
| DE (1) | DE69427693T2 (sv) |
| DK (1) | DK0698317T3 (sv) |
| ES (1) | ES2160123T3 (sv) |
| FI (1) | FI955465A (sv) |
| NO (1) | NO310008B1 (sv) |
| SE (1) | SE501248C2 (sv) |
| WO (1) | WO1994027378A1 (sv) |
Families Citing this family (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3395388B2 (ja) * | 1994-08-16 | 2003-04-14 | ソニー株式会社 | 信号適応処理装置及びエコー抑圧装置 |
| US5566167A (en) * | 1995-01-04 | 1996-10-15 | Lucent Technologies Inc. | Subband echo canceler |
| US5631899A (en) * | 1995-05-31 | 1997-05-20 | Lucent Technologies Inc. | Acoustic echo canceler |
| JP2856113B2 (ja) * | 1995-07-10 | 1999-02-10 | 日本電気株式会社 | エコーキャンセラ |
| US5664011A (en) * | 1995-08-25 | 1997-09-02 | Lucent Technologies Inc. | Echo canceller with adaptive and non-adaptive filters |
| US5815496A (en) * | 1995-09-29 | 1998-09-29 | Lucent Technologies Inc. | Cascade echo canceler arrangement |
| SE505150C3 (sv) * | 1995-10-18 | 1997-08-04 | Ericsson Telefon Ab L M | Adaptivt ekoslaeckningsfoerfarande av dubbelfiltertyp |
| SE517602C2 (sv) * | 1995-10-20 | 2002-06-25 | Ericsson Telefon Ab L M | Fastlåst loop |
| US6031908A (en) * | 1997-11-14 | 2000-02-29 | Tellabs Operations, Inc. | Echo canceller employing dual-H architecture having variable adaptive gain settings |
| DE19801389A1 (de) * | 1998-01-16 | 1999-07-22 | Cit Alcatel | Verfahren zur Echounterdrückung mit adaptiven FIR-Filtern |
| DE19801390A1 (de) * | 1998-01-16 | 1999-07-22 | Cit Alcatel | Einrichtung und Verfahren zur Echounterdrückung mit adaptiven FIR-Filtern |
| US7424109B1 (en) * | 1999-03-25 | 2008-09-09 | Intel Corporation | Rapid training echo cancellor for telecommunications system |
| US6782297B2 (en) * | 2001-05-24 | 2004-08-24 | Eric Paul Tabor | Methods and apparatus for data smoothing |
| US7027501B1 (en) * | 2001-02-28 | 2006-04-11 | Tripath Technology Inc. | Methods and apparatus for adaptive equalization |
| US7162420B2 (en) * | 2002-12-10 | 2007-01-09 | Liberato Technologies, Llc | System and method for noise reduction having first and second adaptive filters |
| JP4297003B2 (ja) * | 2004-07-09 | 2009-07-15 | ヤマハ株式会社 | 適応ハウリングキャンセラ |
| EP1879181B1 (en) * | 2006-07-11 | 2014-05-21 | Nuance Communications, Inc. | Method for compensation audio signal components in a vehicle communication system and system therefor |
| US8411871B2 (en) * | 2007-08-22 | 2013-04-02 | Lantiq Deutschland Gmbh | Echo cancellation |
| US8320553B2 (en) | 2008-10-27 | 2012-11-27 | Apple Inc. | Enhanced echo cancellation |
| CN102117620B (zh) * | 2010-01-06 | 2012-08-29 | 杭州华三通信技术有限公司 | 一种双滤波器传递滤波器系数的方法及装置 |
| US8873615B2 (en) * | 2012-09-19 | 2014-10-28 | Avago Technologies General Ip (Singapore) Pte. Ltd. | Method and controller for equalizing a received serial data stream |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4574166A (en) * | 1983-02-04 | 1986-03-04 | At&T Bell Laboratories | Tandem adaptive filter arrangement |
| GB8423017D0 (en) * | 1984-09-12 | 1984-10-17 | Plessey Co Plc | Echo canceller |
| DE3874997T2 (de) * | 1987-07-20 | 1993-03-25 | Nippon Electric Co | Echokompensator. |
| JPH0752859B2 (ja) * | 1987-11-06 | 1995-06-05 | 日本電気株式会社 | エコー除去装置 |
| FR2628918B1 (fr) * | 1988-03-15 | 1990-08-10 | France Etat | Dispositif annuleur d'echo a filtrage en sous-bandes de frequence |
| SE463589B (sv) * | 1989-04-27 | 1990-12-10 | Ericsson Telefon Ab L M | Foerfarande foer att undvika felaktig ekoeliminering och/eller utjaemning till foeljd av olinjaeriteter i en d/a-omvandlare och/eller en a/d-omvandlare i en telekommunikationsanlaeggning, samt anordning foer utoevande av foerfarandet i samband med d/a-omvandling och anordning foer utoevande av foerfarandet i samband med a/d-omvandling |
-
1993
- 1993-05-14 SE SE9301666A patent/SE501248C2/sv unknown
-
1994
- 1994-05-02 DK DK94916447T patent/DK0698317T3/da active
- 1994-05-02 AU AU68098/94A patent/AU677335B2/en not_active Expired
- 1994-05-02 EP EP94916447A patent/EP0698317B1/en not_active Expired - Lifetime
- 1994-05-02 CN CN94192101A patent/CN1038889C/zh not_active Expired - Lifetime
- 1994-05-02 DE DE69427693T patent/DE69427693T2/de not_active Expired - Lifetime
- 1994-05-02 WO PCT/SE1994/000397 patent/WO1994027378A1/en active IP Right Grant
- 1994-05-02 BR BR9406402A patent/BR9406402A/pt not_active IP Right Cessation
- 1994-05-02 ES ES94916447T patent/ES2160123T3/es not_active Expired - Lifetime
- 1994-05-13 US US08/242,456 patent/US5428605A/en not_active Expired - Lifetime
-
1995
- 1995-11-13 FI FI955465A patent/FI955465A/sv unknown
- 1995-11-13 NO NO954557A patent/NO310008B1/no not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| AU677335B2 (en) | 1997-04-17 |
| FI955465A0 (sv) | 1995-11-13 |
| SE9301666L (sv) | 1994-11-15 |
| AU6809894A (en) | 1994-12-12 |
| EP0698317A1 (en) | 1996-02-28 |
| BR9406402A (pt) | 1997-05-27 |
| US5428605A (en) | 1995-06-27 |
| CN1038889C (zh) | 1998-06-24 |
| WO1994027378A1 (en) | 1994-11-24 |
| DE69427693T2 (de) | 2002-05-02 |
| NO954557D0 (no) | 1995-11-13 |
| ES2160123T3 (es) | 2001-11-01 |
| CN1123072A (zh) | 1996-05-22 |
| SE9301666D0 (sv) | 1993-05-14 |
| DK0698317T3 (da) | 2001-10-15 |
| SE501248C2 (sv) | 1994-12-19 |
| EP0698317B1 (en) | 2001-07-11 |
| FI955465A (sv) | 1995-11-13 |
| DE69427693D1 (de) | 2001-08-16 |
| NO954557L (no) | 1996-01-12 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MK1K | Patent expired |