CA1250633A - Method to test the function of an adaptive echo canceller - Google Patents
Method to test the function of an adaptive echo cancellerInfo
- Publication number
- CA1250633A CA1250633A CA000472965A CA472965A CA1250633A CA 1250633 A CA1250633 A CA 1250633A CA 000472965 A CA000472965 A CA 000472965A CA 472965 A CA472965 A CA 472965A CA 1250633 A CA1250633 A CA 1250633A
- Authority
- CA
- Canada
- Prior art keywords
- signal
- echo
- threshold
- echo canceller
- send
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Road Paving Structures (AREA)
- Liquid Developers In Electrophotography (AREA)
- Accommodation For Nursing Or Treatment Tables (AREA)
- Monitoring And Testing Of Transmission In General (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE8400502A SE441052B (sv) | 1984-02-01 | 1984-02-01 | Forfarande for att testa funktionen hos en anordning for adaptiv ekoeliminering |
| SE8400502-4 | 1984-02-01 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1250633A true CA1250633A (en) | 1989-02-28 |
Family
ID=20354552
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000472965A Expired CA1250633A (en) | 1984-02-01 | 1985-01-28 | Method to test the function of an adaptive echo canceller |
Country Status (22)
Families Citing this family (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0156315B1 (de) * | 1984-03-30 | 1991-06-05 | Siemens Aktiengesellschaft | Schaltungsanordnung zum Prüfen der Funktionsfähigkeit einer Datenübertragunseinrichtung |
| US4689805A (en) * | 1986-04-29 | 1987-08-25 | Oy Nokia Ab | Method of and a device for correcting signal distortion caused by a cable |
| FR2615057B1 (fr) * | 1987-05-05 | 1989-06-16 | Rahyer Alain | Procede et dispositif de simulation de chemin d'echo pour tester des annuleurs d'echo |
| EP0300352B1 (de) * | 1987-07-16 | 1992-12-09 | Siemens Aktiengesellschaft | Prüfeinrichtung für digitale Echokompensatoren |
| NL8701750A (nl) * | 1987-07-24 | 1989-02-16 | At & T & Philips Telecomm | Zend-ontvanginrichting voor vol-duplex datatransmissie met een echocompensator en testvoorzieningen. |
| FI915196L (fi) * | 1991-11-04 | 1993-05-05 | Nokia Telecommunications Oy | Foerfarande foer konvergering av en ekoslaeckare i boerjan av ett samtal |
| US5943392A (en) * | 1997-01-24 | 1999-08-24 | Southwestern Bell Telephone Company | Device for measuring echo return loss in a two-two wire line system |
| US6477492B1 (en) | 1999-06-15 | 2002-11-05 | Cisco Technology, Inc. | System for automated testing of perceptual distortion of prompts from voice response systems |
| US6999560B1 (en) | 1999-06-28 | 2006-02-14 | Cisco Technology, Inc. | Method and apparatus for testing echo canceller performance |
| US20040179676A1 (en) * | 1999-06-30 | 2004-09-16 | Kozo Okuda | Speech communication apparatus |
| US7433665B1 (en) | 2000-07-31 | 2008-10-07 | Marvell International Ltd. | Apparatus and method for converting single-ended signals to a differential signal, and transceiver employing same |
| US7113121B1 (en) | 2000-05-23 | 2006-09-26 | Marvell International Ltd. | Communication driver |
| US7312739B1 (en) * | 2000-05-23 | 2007-12-25 | Marvell International Ltd. | Communication driver |
| US6775529B1 (en) | 2000-07-31 | 2004-08-10 | Marvell International Ltd. | Active resistive summer for a transformer hybrid |
| US7095348B1 (en) | 2000-05-23 | 2006-08-22 | Marvell International Ltd. | Communication driver |
| US7280060B1 (en) | 2000-05-23 | 2007-10-09 | Marvell International Ltd. | Communication driver |
| USRE41831E1 (en) | 2000-05-23 | 2010-10-19 | Marvell International Ltd. | Class B driver |
| US7194037B1 (en) | 2000-05-23 | 2007-03-20 | Marvell International Ltd. | Active replica transformer hybrid |
| US6462688B1 (en) | 2000-12-18 | 2002-10-08 | Marvell International, Ltd. | Direct drive programmable high speed power digital-to-analog converter |
| US7606547B1 (en) | 2000-07-31 | 2009-10-20 | Marvell International Ltd. | Active resistance summer for a transformer hybrid |
| US7298173B1 (en) | 2004-10-26 | 2007-11-20 | Marvell International Ltd. | Slew rate control circuit for small computer system interface (SCSI) differential driver |
| US7680250B1 (en) | 2004-11-24 | 2010-03-16 | Interactive Quality Services | Interactive method and system of testing an automated call telephonic communication system |
| US7312662B1 (en) | 2005-08-09 | 2007-12-25 | Marvell International Ltd. | Cascode gain boosting system and method for a transmitter |
| US7577892B1 (en) | 2005-08-25 | 2009-08-18 | Marvell International Ltd | High speed iterative decoder |
| CN102044253B (zh) * | 2010-10-29 | 2012-05-30 | 深圳创维－Rgb电子有限公司 | 一种回声信号处理方法、系统及电视机 |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3637954A (en) * | 1969-05-22 | 1972-01-25 | Bell Telephone Labor Inc | Method and apparatus for dynamic testing of echo suppressors in telephone trunk systems |
| JPS5325767B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * | 1974-09-05 | 1978-07-28 | ||
| FR2448258A1 (fr) * | 1979-02-05 | 1980-08-29 | Trt Telecom Radio Electr | Systeme de test d'un dispositif muni d'un annuleur d'echo |
| US4282411A (en) * | 1979-06-04 | 1981-08-04 | Tellabs, Inc. | Residual echo suppressor for echo canceller |
| US4360712A (en) * | 1979-09-05 | 1982-11-23 | Communications Satellite Corporation | Double talk detector for echo cancellers |
| FR2469837A1 (fr) * | 1979-11-07 | 1981-05-22 | Trt Telecom Radio Electr | Dispositif de detection de porteuse dans un modem muni d'un annuleur d'echo |
| SE426764B (sv) * | 1981-11-02 | 1983-02-07 | Ellemtel Utvecklings Ab | Forfarande att astadkomma adaptiv ekoeliminering vid overforing av digital information i duplex jemte anordning for utforande av forfarandet |
| US4546216A (en) * | 1983-01-27 | 1985-10-08 | At&T Bell Laboratories | Echo suppressor for improving echo canceler performance |
-
1984
- 1984-02-01 SE SE8400502A patent/SE441052B/sv not_active IP Right Cessation
- 1984-12-19 JP JP60500365A patent/JPH06101694B2/ja not_active Expired - Lifetime
- 1984-12-19 BR BR8407338A patent/BR8407338A/pt not_active IP Right Cessation
- 1984-12-19 FI FI860812A patent/FI860812A7/fi not_active Application Discontinuation
- 1984-12-19 EP EP85900507A patent/EP0199727B1/en not_active Expired
- 1984-12-19 KR KR1019850700235A patent/KR850700294A/ko active Granted
- 1984-12-19 US US06/787,803 patent/US4727566A/en not_active Expired - Lifetime
- 1984-12-19 AU AU38333/85A patent/AU572607B2/en not_active Ceased
- 1984-12-19 KR KR1019850700235D patent/KR890004594B1/ko not_active Expired
- 1984-12-19 WO PCT/SE1984/000435 patent/WO1985003607A1/en active IP Right Grant
- 1984-12-19 DE DE8585900507T patent/DE3479950D1/de not_active Expired
-
1985
- 1985-01-09 NZ NZ210795A patent/NZ210795A/xx unknown
- 1985-01-18 GR GR850142A patent/GR850142B/el unknown
- 1985-01-21 EG EG33/85A patent/EG16599A/xx active
- 1985-01-25 IT IT19229/85A patent/IT1183302B/it active
- 1985-01-25 ES ES539839A patent/ES8606756A1/es not_active Expired
- 1985-01-28 CA CA000472965A patent/CA1250633A/en not_active Expired
- 1985-01-31 DD DD85272909A patent/DD229260A5/de unknown
- 1985-01-31 MX MX204210A patent/MX157106A/es unknown
- 1985-02-01 PT PT79914A patent/PT79914B/pt unknown
- 1985-02-01 MA MA20567A patent/MA20343A1/fr unknown
- 1985-09-18 NO NO853668A patent/NO853668L/no unknown
- 1985-09-30 DK DK443085A patent/DK443085A/da unknown
Also Published As
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |