NO853668L - Fremgangsmaate for aa teste funksjonen av en selvtilpassende ekkoeliminator. - Google Patents

Fremgangsmaate for aa teste funksjonen av en selvtilpassende ekkoeliminator.

Info

Publication number
NO853668L
NO853668L NO853668A NO853668A NO853668L NO 853668 L NO853668 L NO 853668L NO 853668 A NO853668 A NO 853668A NO 853668 A NO853668 A NO 853668A NO 853668 L NO853668 L NO 853668L
Authority
NO
Norway
Prior art keywords
signal
echo
compensated
threshold value
determined
Prior art date
Application number
NO853668A
Other languages
English (en)
Norwegian (no)
Inventor
Ingemar Erik Dahlqvist
Original Assignee
Ericsson Telefon Ab L M
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Ericsson Telefon Ab L M filed Critical Ericsson Telefon Ab L M
Publication of NO853668L publication Critical patent/NO853668L/no

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
NO853668A 1984-02-01 1985-09-18 Fremgangsmaate for aa teste funksjonen av en selvtilpassende ekkoeliminator. NO853668L (no)

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
NO853668L true NO853668L (no) 1985-09-18

Family

ID=20354552

Family Applications (1)

Application Number Title Priority Date Filing Date
NO853668A NO853668L (no) 1984-02-01 1985-09-18 Fremgangsmaate for aa teste funksjonen av en selvtilpassende ekkoeliminator.

Country Status (22)

Country Link
US (1) US4727566A (fi)
EP (1) EP0199727B1 (fi)
JP (1) JPH06101694B2 (fi)
KR (2) KR890004594B1 (fi)
AU (1) AU572607B2 (fi)
BR (1) BR8407338A (fi)
CA (1) CA1250633A (fi)
DD (1) DD229260A5 (fi)
DE (1) DE3479950D1 (fi)
DK (1) DK443085A (fi)
EG (1) EG16599A (fi)
ES (1) ES8606756A1 (fi)
FI (1) FI860812A (fi)
GR (1) GR850142B (fi)
IT (1) IT1183302B (fi)
MA (1) MA20343A1 (fi)
MX (1) MX157106A (fi)
NO (1) NO853668L (fi)
NZ (1) NZ210795A (fi)
PT (1) PT79914B (fi)
SE (1) SE441052B (fi)
WO (1) WO1985003607A1 (fi)

Families Citing this family (25)

* Cited by examiner, † Cited by third party
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
ES2037147T3 (es) * 1987-07-16 1993-06-16 Siemens Aktiengesellschaft Instalacion de prueba para compensadores digitales de ecos.
NL8701750A (nl) * 1987-07-24 1989-02-16 At & T & Philips Telecomm Zend-ontvanginrichting voor vol-duplex datatransmissie met een echocompensator en testvoorzieningen.
FI915196A (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
USRE41831E1 (en) 2000-05-23 2010-10-19 Marvell International Ltd. Class B driver
US6462688B1 (en) 2000-12-18 2002-10-08 Marvell International, Ltd. Direct drive programmable high speed power digital-to-analog converter
US7194037B1 (en) * 2000-05-23 2007-03-20 Marvell International Ltd. Active replica transformer hybrid
US6775529B1 (en) 2000-07-31 2004-08-10 Marvell International Ltd. Active resistive summer for a transformer hybrid
US7312739B1 (en) 2000-05-23 2007-12-25 Marvell International Ltd. Communication driver
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
US7280060B1 (en) 2000-05-23 2007-10-09 Marvell International Ltd. Communication driver
US7095348B1 (en) 2000-05-23 2006-08-22 Marvell International Ltd. Communication driver
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)

* Cited by examiner, † Cited by third party
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 (fi) * 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

Also Published As

Publication number Publication date
DK443085D0 (da) 1985-09-30
PT79914B (en) 1986-09-11
WO1985003607A1 (en) 1985-08-15
IT1183302B (it) 1987-10-22
EP0199727B1 (en) 1989-09-27
DE3479950D1 (en) 1989-11-02
MA20343A1 (fr) 1985-10-01
KR890004594B1 (ko) 1989-11-16
AU3833385A (en) 1985-08-27
MX157106A (es) 1988-10-27
EG16599A (en) 1989-01-30
ES8606756A1 (es) 1986-04-01
US4727566A (en) 1988-02-23
IT8519229A0 (it) 1985-01-25
CA1250633A (en) 1989-02-28
GR850142B (fi) 1985-03-04
SE441052B (sv) 1985-09-02
SE8400502D0 (sv) 1984-02-01
JPH06101694B2 (ja) 1994-12-12
KR850700294A (ko) 1985-12-26
BR8407338A (pt) 1986-11-25
JPS61501182A (ja) 1986-06-12
PT79914A (en) 1985-03-01
ES539839A0 (es) 1986-04-01
DD229260A5 (de) 1985-10-30
AU572607B2 (en) 1988-05-12
NZ210795A (en) 1989-01-06
FI860812A0 (fi) 1986-02-25
SE8400502L (fi) 1985-08-02
DK443085A (da) 1985-09-30
EP0199727A1 (en) 1986-11-05
FI860812A (fi) 1986-02-25

Similar Documents

Publication Publication Date Title
NO853668L (no) Fremgangsmaate for aa teste funksjonen av en selvtilpassende ekkoeliminator.
US4034340A (en) System for determining the quality of transmission of incoming digital message signals
US7634032B2 (en) System and method for detecting non-linear distortion of signals communicated across telecommunication lines
AU654059B2 (en) A method for the detection of a disable tone signal of an echo canceller
CA1144999A (en) Arrangement for testing a device provided with an echo canceller
US4368361A (en) Automatically adjustable bidirectional-to-unidirectional transmission network
US5663968A (en) Margin test method and apparatus for intergrated services digital networks
KR860002211B1 (ko) 2중통신의 디지틀 정보의 전송에 있어서 적절한 반향소거를 제공하는 방법과 이 방법을 실행하는 장치
KR930001630A (ko) 에코캔슬러를 구비한 쌍방향 데이타 전송 단말 장치
US4331843A (en) Apparatus for controlling and indicating the integrity of the connection of telephone subscribers to a switching system
US4654807A (en) Method of measuring communication channel impairement in polling applications
US5444776A (en) Bridge for a network interface unit
NO175400B (no) Ekkokompensator
CA1236882A (en) Method of detecting hazardous line voltages over a two-wire line
JPH09321674A (ja) 伝送路補償システム
SU1721829A1 (ru) Устройство автоматического контрол каналов св зи
JPS59107662A (ja) 時分割方向制御伝送方式の回線監視方式
US1825715A (en) Telegraph transmission measuring system
JPS62104342A (ja) デイジタル中継器の動作余裕度監視装置
SU302837A1 (ru) Способ поверочных шлейфных измерений
JPS58215838A (ja) 光中継器監視回路
JPS60213159A (ja) 回線障害監視装置
JPH0267027A (ja) 双方向光通信回路
EP0551937A1 (fr) Dispositif de mesure de qualité de transmission dans une ligne à deux fils avec annulation d'écho
JPS5949051A (ja) 通話路試験装置