DE3478268D1 - Echo canceller with an adaptive digital filter for a transmission system - Google Patents
Echo canceller with an adaptive digital filter for a transmission systemInfo
- Publication number
- DE3478268D1 DE3478268D1 DE8484401082T DE3478268T DE3478268D1 DE 3478268 D1 DE3478268 D1 DE 3478268D1 DE 8484401082 T DE8484401082 T DE 8484401082T DE 3478268 T DE3478268 T DE 3478268T DE 3478268 D1 DE3478268 D1 DE 3478268D1
- Authority
- DE
- Germany
- Prior art keywords
- echo
- data
- local
- digital filter
- pct
- 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
Links
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
- H04B3/232—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 phase shift, phase roll or frequency offset correction
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
- Filters That Use Time-Delay Elements (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8308713A FR2546693B1 (fr) | 1983-05-26 | 1983-05-26 | Annuleur d'echo a filtre numerique adaptatif pour systeme de transmission |
Publications (1)
Publication Number | Publication Date |
---|---|
DE3478268D1 true DE3478268D1 (en) | 1989-06-22 |
Family
ID=9289195
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE8484401082T Expired DE3478268D1 (en) | 1983-05-26 | 1984-05-25 | Echo canceller with an adaptive digital filter for a transmission system |
Country Status (8)
Country | Link |
---|---|
US (1) | US4852081A (de) |
EP (1) | EP0127544B1 (de) |
JP (1) | JPH0738602B2 (de) |
AT (1) | ATE43213T1 (de) |
CA (1) | CA1224254A (de) |
DE (1) | DE3478268D1 (de) |
FR (1) | FR2546693B1 (de) |
WO (1) | WO1984004858A1 (de) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01254024A (ja) * | 1988-04-02 | 1989-10-11 | Hitachi Ltd | A/d変換器 |
US5388092A (en) * | 1989-06-27 | 1995-02-07 | Nec Corporation | Echo canceller for two-wire full duplex digital data transmission |
US5668794A (en) * | 1995-09-29 | 1997-09-16 | Crystal Semiconductor | Variable gain echo suppressor |
US6052462A (en) * | 1997-07-10 | 2000-04-18 | Tellabs Operations, Inc. | Double talk detection and echo control circuit |
KR100329427B1 (ko) * | 1999-07-16 | 2002-03-20 | 손경식 | 스테레오 음향반향 제거기 및 그 제거방법 |
US6934387B1 (en) | 1999-12-17 | 2005-08-23 | Marvell International Ltd. | Method and apparatus for digital near-end echo/near-end crosstalk cancellation with adaptive correlation |
KR100735277B1 (ko) * | 2003-07-30 | 2007-07-03 | 삼성전자주식회사 | 광대역 무선 접속 통신 시스템에서 레인징 방법 |
US7065207B2 (en) * | 2003-09-11 | 2006-06-20 | Freescale Semiconductor, Inc. | Controlling attenuation during echo suppression |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT1115559B (it) * | 1978-08-29 | 1986-02-03 | Cselt Centro Studi Lab Telecom | Procedimento e dispositivo per la cancellazione numerica dell eco |
NL7902053A (nl) * | 1979-03-15 | 1980-09-17 | Philips Nv | Echocompensator voor homochrone data overdrachtssyste- men. |
DE2921780C3 (de) * | 1979-05-29 | 1982-02-11 | Siemens AG, 1000 Berlin und 8000 München | Verfahren und Schaltungsanordnung zur Übertragung von Daten über eine Zweidrahtleitung |
FR2460075B1 (fr) * | 1979-06-22 | 1988-12-09 | Cit Alcatel | Annuleur d'echo adaptatif pour transmission de donnees en duplex |
FR2479617A1 (fr) * | 1980-03-26 | 1981-10-02 | Trt Telecom Radio Electr | Annuleur d'echo pour signal d'echo a phase variable |
EP0073869B1 (de) * | 1981-09-08 | 1985-12-27 | International Business Machines Corporation | Einrichtung zum Datenempfang mit einem hörerseitigen Echokompensator |
US4682358A (en) * | 1984-12-04 | 1987-07-21 | American Telephone And Telegraph Company | Echo canceller |
-
1983
- 1983-05-26 FR FR8308713A patent/FR2546693B1/fr not_active Expired
-
1984
- 1984-05-25 WO PCT/FR1984/000140 patent/WO1984004858A1/fr unknown
- 1984-05-25 EP EP84401082A patent/EP0127544B1/de not_active Expired
- 1984-05-25 DE DE8484401082T patent/DE3478268D1/de not_active Expired
- 1984-05-25 CA CA000455140A patent/CA1224254A/fr not_active Expired
- 1984-05-25 AT AT84401082T patent/ATE43213T1/de not_active IP Right Cessation
- 1984-05-25 JP JP59502219A patent/JPH0738602B2/ja not_active Expired - Lifetime
- 1984-05-25 US US07/083,937 patent/US4852081A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
CA1224254A (fr) | 1987-07-14 |
EP0127544A1 (de) | 1984-12-05 |
JPH0738602B2 (ja) | 1995-04-26 |
ATE43213T1 (de) | 1989-06-15 |
WO1984004858A1 (fr) | 1984-12-06 |
US4852081A (en) | 1989-07-25 |
JPS60501438A (ja) | 1985-08-29 |
EP0127544B1 (de) | 1989-05-17 |
FR2546693B1 (fr) | 1985-08-30 |
FR2546693A1 (fr) | 1984-11-30 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8364 | No opposition during term of opposition | ||
8339 | Ceased/non-payment of the annual fee |