BR9912774A - Dispositivo de comunicações, supressor de eco, e, processo para suprimir um componente de eco de um sinal de comunicações - Google Patents

Dispositivo de comunicações, supressor de eco, e, processo para suprimir um componente de eco de um sinal de comunicações

Info

Publication number
BR9912774A
BR9912774A BR9912774-1A BR9912774A BR9912774A BR 9912774 A BR9912774 A BR 9912774A BR 9912774 A BR9912774 A BR 9912774A BR 9912774 A BR9912774 A BR 9912774A
Authority
BR
Brazil
Prior art keywords
echo
source signal
saturation
filter
suppressing
Prior art date
Application number
BR9912774-1A
Other languages
English (en)
Inventor
Eric Douglas Romesburg
Original Assignee
Ericsson Inc
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 Inc filed Critical Ericsson Inc
Publication of BR9912774A publication Critical patent/BR9912774A/pt

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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Telephone Function (AREA)
  • Filters That Use Time-Delay Elements (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)

Abstract

"DISPOSITIVO DE COMUNICAçõES, SUPRESSOR DE ECO, E, PROCESSO PARA SUPRIMIR UM COMPONENETE DE ECO DE UM SINAL DE COMUNICAçõES" Processos e aparelho para supressão de eco e ruído consideram saturação ocasional de um sinal fonte que contém eco e/ou ruído e adaptação de controle de um filtro de supressão para minimizar os efeitos negativos de tal saturação de sinal fonte. De acordo com configurações tomadas como exemplo, coeficientes de filtro de um filtro adaptável são atualizados somente quando um valor predominante do sinal fonte está dentro de uma faixa predeterminada de valores possíveis de sinal fonte. Consequentemente, a resposta de filtro não é perturbada pela saturação do sinal fonte, e o filtro adaptável continua a fornecer a supressão de eco de qualidade, mesmo imediatamente em seguida a períodos de saturação.
BR9912774-1A 1998-08-07 1999-07-22 Dispositivo de comunicações, supressor de eco, e, processo para suprimir um componente de eco de um sinal de comunicações BR9912774A (pt)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/131,167 US6850783B1 (en) 1998-08-07 1998-08-07 Methods and apparatus for mitigating the effects of microphone overload in echo cancelation systems
PCT/US1999/014161 WO2000008837A1 (en) 1998-08-07 1999-07-22 Methods and apparatus for mitigating the effects of microphone overload in echo cancelation systems

Publications (1)

Publication Number Publication Date
BR9912774A true BR9912774A (pt) 2001-05-08

Family

ID=22448204

Family Applications (1)

Application Number Title Priority Date Filing Date
BR9912774-1A BR9912774A (pt) 1998-08-07 1999-07-22 Dispositivo de comunicações, supressor de eco, e, processo para suprimir um componente de eco de um sinal de comunicações

Country Status (12)

Country Link
US (1) US6850783B1 (pt)
EP (1) EP1103139A1 (pt)
JP (1) JP2002522970A (pt)
KR (1) KR20010072327A (pt)
CN (1) CN1322427A (pt)
AU (1) AU758422B2 (pt)
BR (1) BR9912774A (pt)
EE (1) EE200100077A (pt)
HK (1) HK1041140A1 (pt)
IL (1) IL141072A (pt)
MY (1) MY121827A (pt)
WO (1) WO2000008837A1 (pt)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7835773B2 (en) * 2005-03-23 2010-11-16 Kyocera Corporation Systems and methods for adjustable audio operation in a mobile communication device
US20070047731A1 (en) * 2005-08-31 2007-03-01 Acoustic Technologies, Inc. Clipping detector for echo cancellation
GB2456400B (en) * 2008-01-21 2012-12-26 Skype Reducing echo in a signal to be transmitted in a communication system
JP2011100029A (ja) * 2009-11-06 2011-05-19 Nec Corp 信号処理方法、情報処理装置、及び信号処理プログラム
CN102314933A (zh) * 2010-07-08 2012-01-11 宏碁股份有限公司 多媒体播放设备及产生多媒体播放设备的输出信号的方法
US9042535B2 (en) * 2010-09-29 2015-05-26 Cisco Technology, Inc. Echo control optimization
CN102611965A (zh) * 2012-03-01 2012-07-25 广东步步高电子工业有限公司 解决双麦克风消噪手机发送响度受手机与嘴距离影响的方法
CN103716478B (zh) * 2013-12-11 2016-04-06 电子科技大学 双向回音消除方法

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2508574B2 (ja) 1992-11-10 1996-06-19 日本電気株式会社 多チャンネルエコ―除去装置
JPH06216811A (ja) * 1993-01-20 1994-08-05 Toshiba Corp エコーキャンセラを備えた音声通信装置
US5465413A (en) * 1993-03-05 1995-11-07 Trimble Navigation Limited Adaptive noise cancellation
US5475731A (en) 1994-01-07 1995-12-12 Ericsson Inc. Echo-canceling system and method using echo estimate to modify error signal
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
JP2702423B2 (ja) * 1994-11-11 1998-01-21 埼玉日本電気株式会社 切替式エコーキャンセラ
US5664011A (en) * 1995-08-25 1997-09-02 Lucent Technologies Inc. Echo canceller with adaptive and non-adaptive filters
JP3199155B2 (ja) * 1995-10-18 2001-08-13 日本電信電話株式会社 反響消去装置
US5872728A (en) * 1996-06-20 1999-02-16 International Business Machines Corporation Process for computing the coefficients of an adaptive filter in an echo-cancellor
US6044068A (en) * 1996-10-01 2000-03-28 Telefonaktiebolaget Lm Ericsson Silence-improved echo canceller
JP2982718B2 (ja) * 1996-11-01 1999-11-29 日本電気株式会社 衛星通信装置
EP0847180A1 (en) * 1996-11-27 1998-06-10 Nokia Mobile Phones Ltd. Double talk detector
US5911124A (en) * 1997-02-03 1999-06-08 Motorola, Inc. Method and apparatus for applying echo mitigation in a communication device
JP3597671B2 (ja) * 1997-05-16 2004-12-08 三菱電機株式会社 ハンズフリー電話機

Also Published As

Publication number Publication date
JP2002522970A (ja) 2002-07-23
EP1103139A1 (en) 2001-05-30
AU5205399A (en) 2000-02-28
KR20010072327A (ko) 2001-07-31
CN1322427A (zh) 2001-11-14
AU758422B2 (en) 2003-03-20
IL141072A0 (en) 2002-02-10
MY121827A (en) 2006-02-28
EE200100077A (et) 2002-06-17
HK1041140A1 (zh) 2002-06-28
US6850783B1 (en) 2005-02-01
WO2000008837A1 (en) 2000-02-17
IL141072A (en) 2005-11-20

Similar Documents

Publication Publication Date Title
CA2267411A1 (en) Echo canceller with silence detection
BR9407935A (pt) Filtro adaptável cancelador de eco processo para filtrar adaptavelmente um sinal e processo para cancelar um sinal de eco de um sinal de conversaçao de outra extremidade
BR9912774A (pt) Dispositivo de comunicações, supressor de eco, e, processo para suprimir um componente de eco de um sinal de comunicações
AU6160800A (en) Echo cancellation device for cancelling echos in a transceiver unit
ATE188828T1 (de) Störungsunterdrückungs-verfahren und -system für rückkehrsignale in kabelanlagen
KR101445999B1 (ko) 광대역 음성 신호용 계산 절감 에코 소거기
FI863169A0 (fi) Fullstaendigt dubbelriktad hoegtalartelefon foer radio- och kabeltelefonsystem.
CA2132428A1 (en) Speech communication apparatus
AU1696301A (en) Communications terminal having a receiver and method for removing known interferers from a digitized intermediate frequency signal
MY122658A (en) Enhancement of near-end voice signals in an echo suppression system
BR9713809A (pt) Dispositivo de processamento de sinal, processos de processos de processamnto de um sinal de informação, e de um sinal de entrada para produzir um sinal de saìda, estação móvel, e, dispositivo de supressão de eco e ruìdo para processar um sinal de entrada.
WO2002031990A3 (en) Interference mitigation in wireless communications by training of interfering signals
KR920702103A (ko) 에코 제거기
ATE244472T1 (de) Verfahren und empfänger zur interferenzunterdrückung
DE69615443D1 (de) Bauelement für den vollständigen Schutz einer Schnittstellenschaltung von Teilnehmerleitungen
WO1999041897A3 (de) Verfahren zur verbesserung der akustischen rückhördämpfung in freisprecheinrichtungen
CA2204059A1 (en) Intelligent near-end speech detection
BRPI9709148B8 (pt) aparelho para processamento não-linear em um sistema de comunicações
CA2270994A1 (en) Method of operating the channel equalizer in a receiver for dtv signals subject to co-channel ntsc interference
YU244082A (en) Method and arrangement for adaptive cancelling of echo at duplex data reception
DK0635178T3 (da) Fremgangsmåde til undgåelse af selvsving i forbindelse med ekkoundertrykkelse
DE69232501D1 (de) Vorrichtung zur reduzierung der gefahr unerwünschter parameterabweichungen eines adaptiven, zur echo unterdrückung verwendeten filter
SE9603982L (sv) Anordning för att undertrycka harmoniska störningar vid signalöverföring
DE69009286T2 (de) Filteranordnung zur Unterdrückung der Radiofrequenzstörungen an Übertragungsleitungen.
WO2004098088A3 (en) Multiple channel interference cancellation

Legal Events

Date Code Title Description
B08F Application dismissed because of non-payment of annual fees [chapter 8.6 patent gazette]

Free format text: REFERENTE A 8O , 9O E 10O ANUIDADES.

B08K Patent lapsed as no evidence of payment of the annual fee has been furnished to inpi [chapter 8.11 patent gazette]

Free format text: REFERENTE AO DESPACHO 8.6 DA RPI 1999 DE 28/04/2009.