DE69429947T2 - Echokompensator - Google Patents

Echokompensator

Info

Publication number
DE69429947T2
DE69429947T2 DE69429947T DE69429947T DE69429947T2 DE 69429947 T2 DE69429947 T2 DE 69429947T2 DE 69429947 T DE69429947 T DE 69429947T DE 69429947 T DE69429947 T DE 69429947T DE 69429947 T2 DE69429947 T2 DE 69429947T2
Authority
DE
Germany
Prior art keywords
echo canceller
canceller
echo
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 - Fee Related
Application number
DE69429947T
Other languages
English (en)
Other versions
DE69429947D1 (de
Inventor
Hiroki Furukawa
Junichi Tagawa
Takeo Kanamori
Satoru Ibaraki
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Application granted granted Critical
Publication of DE69429947D1 publication Critical patent/DE69429947D1/de
Publication of DE69429947T2 publication Critical patent/DE69429947T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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
    • H04B3/234—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 double talk detection
    • 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)
  • Computer Networks & Wireless Communication (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
DE69429947T 1993-05-28 1994-05-27 Echokompensator Expired - Fee Related DE69429947T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5126883A JP2538176B2 (ja) 1993-05-28 1993-05-28 エコ―制御装置

Publications (2)

Publication Number Publication Date
DE69429947D1 DE69429947D1 (de) 2002-04-04
DE69429947T2 true DE69429947T2 (de) 2002-11-28

Family

ID=14946211

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69429947T Expired - Fee Related DE69429947T2 (de) 1993-05-28 1994-05-27 Echokompensator

Country Status (4)

Country Link
US (1) US5463618A (de)
EP (1) EP0627840B1 (de)
JP (1) JP2538176B2 (de)
DE (1) DE69429947T2 (de)

Families Citing this family (79)

* Cited by examiner, † Cited by third party
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
JP2947093B2 (ja) * 1994-11-02 1999-09-13 日本電気株式会社 適応フィルタによるシステム同定の方法および装置
US5526426A (en) * 1994-11-08 1996-06-11 Signalworks System and method for an efficiently constrained frequency-domain adaptive filter
US5633936A (en) * 1995-01-09 1997-05-27 Texas Instruments Incorporated Method and apparatus for detecting a near-end speech signal
US5745564A (en) * 1995-01-26 1998-04-28 Northern Telecom Limited Echo cancelling arrangement
JP3381112B2 (ja) * 1995-03-09 2003-02-24 ソニー株式会社 エコー除去装置
JPH08251082A (ja) * 1995-03-13 1996-09-27 Sony Corp エコー除去装置
US5606550A (en) * 1995-05-22 1997-02-25 Hughes Electronics Echo canceller and method for a voice network using low rate coding and digital speech interpolation transmission
US5610909A (en) * 1995-05-31 1997-03-11 Lucent Technologies Inc. Multistage echo canceler including time variation compensation
US5631899A (en) * 1995-05-31 1997-05-20 Lucent Technologies Inc. Acoustic echo canceler
DE19525382B4 (de) * 1995-07-12 2005-12-22 Deutsche Telekom Ag Verfahren zur Steuerung der Schrittweite eines Echokompensators mit adaptivem Filter
US5664011A (en) * 1995-08-25 1997-09-02 Lucent Technologies Inc. Echo canceller with adaptive and non-adaptive filters
US5809463A (en) * 1995-09-15 1998-09-15 Hughes Electronics Method of detecting double talk in an echo canceller
US5649012A (en) * 1995-09-15 1997-07-15 Hughes Electronics Method for synthesizing an echo path in an echo canceller
US5631900A (en) * 1995-09-29 1997-05-20 Crystal Semiconductor Double-Talk detector for echo canceller
US5752229A (en) * 1996-06-28 1998-05-12 Lucent Technologies Inc. Intelligent near-end speech detection
US6044068A (en) * 1996-10-01 2000-03-28 Telefonaktiebolaget Lm Ericsson Silence-improved echo canceller
DE19647276A1 (de) * 1996-11-15 1998-05-20 Alsthom Cge Alcatel Verfahren und Anordnung zur adaptiven Echokompensation
US6035034A (en) * 1996-12-20 2000-03-07 Telefonaktiebolaget L M Ericsson (Publ) Double talk and echo path change detection in a telephony system
JP3139405B2 (ja) * 1997-02-28 2001-02-26 日本電気株式会社 エコーキャンセラ
JPH10257583A (ja) * 1997-03-06 1998-09-25 Asahi Chem Ind Co Ltd 音声処理装置およびその音声処理方法
DE19714966C2 (de) * 1997-04-10 1999-04-01 Siemens Ag Vorrichtung zur Rückhördämpfung
FI104524B (fi) * 1997-04-18 2000-02-15 Nokia Mobile Phones Ltd Kaiunpoistojärjestelmä ja -menetelmä sekä matkaviestin
JP3236242B2 (ja) * 1997-05-12 2001-12-10 沖電気工業株式会社 エコーキャンセラ装置
US6185195B1 (en) * 1997-05-16 2001-02-06 Qualcomm Incorporated Methods for preventing and detecting message collisions in a half-duplex communication system
US6052462A (en) * 1997-07-10 2000-04-18 Tellabs Operations, Inc. Double talk detection and echo control circuit
US6108412A (en) * 1997-10-07 2000-08-22 Nortel Networks Corporation Adaptive echo cancelling system for telephony applications
GB2330746B (en) * 1997-10-24 2002-07-17 Mitel Corp Double-talk insensitive NLMS algorithm
SG77611A1 (en) 1997-11-13 2001-01-16 Univ Singapore Acoustic echo cancellation equipped with howling suppressor and double-talk detector
US6028929A (en) * 1997-11-14 2000-02-22 Tellabs Operations, Inc. Echo canceller employing dual-H architecture having improved non-linear echo path detection
US6031908A (en) * 1997-11-14 2000-02-29 Tellabs Operations, Inc. Echo canceller employing dual-H architecture having variable adaptive gain settings
US6266409B1 (en) * 1997-11-14 2001-07-24 Tellabs Operations, Inc. Echo canceller employing dual-H architecture having improved double-talk detection
JP3267556B2 (ja) * 1998-02-18 2002-03-18 沖電気工業株式会社 エコー除去装置および送話器
FR2776449B1 (fr) * 1998-03-23 2000-04-28 Alsthom Cge Alcatel Detection d'activite vocale en presence d'une source parasite de signal sonore
US6385176B1 (en) * 1998-06-04 2002-05-07 Lucent Technologies Inc. Communication system based on echo canceler tap profile
US6901143B1 (en) * 1999-01-11 2005-05-31 Nec Corporation Voice switching system capable of improving a quality of conversation
US7933295B2 (en) 1999-04-13 2011-04-26 Broadcom Corporation Cable modem with voice processing capability
US6765931B1 (en) 1999-04-13 2004-07-20 Broadcom Corporation Gateway with voice
EP1188285B1 (de) * 1999-04-13 2012-06-13 Broadcom Corporation Gateway mit sprache
US6912209B1 (en) 1999-04-13 2005-06-28 Broadcom Corporation Voice gateway with echo cancellation
US7117149B1 (en) * 1999-08-30 2006-10-03 Harman Becker Automotive Systems-Wavemakers, Inc. Sound source classification
JP3566158B2 (ja) * 1999-12-07 2004-09-15 三菱電機株式会社 エコーキャンセラ装置
AU2094201A (en) 1999-12-13 2001-06-18 Broadcom Corporation Voice gateway with downstream voice synchronization
TW449993B (en) * 1999-12-17 2001-08-11 Winbond Electronics Corp Echo canceller
EP1942607A3 (de) * 2000-09-11 2008-07-30 Broadcom Corporation Kabelmodem mit Stimmverarbeitungsfunktion
EP1356633A2 (de) * 2000-09-11 2003-10-29 Broadcom Corporation Kabelmodem mit sprachverarbeitungsfähigkeit
KR20020041556A (ko) * 2000-11-28 2002-06-03 박종섭 이동통신 시스템에서 반향 제거 방법
JP4568439B2 (ja) * 2001-01-22 2010-10-27 パナソニック株式会社 エコー抑圧装置
US6792107B2 (en) 2001-01-26 2004-09-14 Lucent Technologies Inc. Double-talk detector suitable for a telephone-enabled PC
US6839427B2 (en) * 2001-12-20 2005-01-04 Motorola, Inc. Method and apparatus for echo canceller automatic gain control
US20030219113A1 (en) * 2002-05-21 2003-11-27 Bershad Neil J. Echo canceller with double-talk and channel impulse response adaptation
KR20030091362A (ko) * 2002-05-27 2003-12-03 엘지전자 주식회사 선로 반향 제거 장치
WO2004070969A1 (en) * 2003-02-03 2004-08-19 Telefonaktiebolaget Lm Ericsson (Publ) Echo cancellation device including a double talk detector
US7599432B2 (en) * 2003-12-08 2009-10-06 Freescale Semiconductor, Inc. Method and apparatus for dynamically inserting gain in an adaptive filter system
KR20060130067A (ko) * 2003-12-10 2006-12-18 코닌클리케 필립스 일렉트로닉스 엔.브이. 개별 갱신 제어 전략을 갖는 직렬 배치의 적응 필터들을구비한 에코 제거기
FR2877516A1 (fr) * 2004-11-04 2006-05-05 France Telecom Dispositif et procede de detection d'une divergence d'un systeme adaptatif et utilisation d'un tel dispositif pour la detection d'une divergence d'un filtre numerique.
JP4297055B2 (ja) 2005-01-12 2009-07-15 ヤマハ株式会社 カラオケ装置
US8457614B2 (en) * 2005-04-07 2013-06-04 Clearone Communications, Inc. Wireless multi-unit conference phone
US20070033030A1 (en) * 2005-07-19 2007-02-08 Oded Gottesman Techniques for measurement, adaptation, and setup of an audio communication system
US7817797B2 (en) * 2006-06-07 2010-10-19 Mitel Networks Corporation Method and apparatus for detecting echo path changes in an acoustic echo canceller
CN101179294B (zh) * 2006-11-09 2012-07-04 黄山好视达通信技术有限公司 自适应回声消除器及其回声消除方法
US7881459B2 (en) * 2007-08-15 2011-02-01 Motorola, Inc. Acoustic echo canceller using multi-band nonlinear processing
DE112007003625T5 (de) * 2007-08-24 2010-07-15 Fujitsu Ltd., Kawasaki Echounterdrückungsvorrichtung, echounterdrückungssystem, Echounterdrückungsverfahren und Computerprogramm
US8199927B1 (en) 2007-10-31 2012-06-12 ClearOnce Communications, Inc. Conferencing system implementing echo cancellation and push-to-talk microphone detection using two-stage frequency filter
US8050398B1 (en) 2007-10-31 2011-11-01 Clearone Communications, Inc. Adaptive conferencing pod sidetone compensator connecting to a telephonic device having intermittent sidetone
PL216396B1 (pl) * 2008-03-06 2014-03-31 Politechnika Gdańska Sposób i układ tłumienia echa akustycznego w terminalu VoIP
US9185233B2 (en) * 2010-05-25 2015-11-10 Intel Deutschland Gmbh Audio communication device and method using fixed echo cancellation filter coefficients
US9473865B2 (en) * 2012-03-01 2016-10-18 Conexant Systems, Inc. Integrated motion detection using changes in acoustic echo path
US8655418B2 (en) * 2012-05-31 2014-02-18 Continental Automotive Systems, Inc Method and apparatus for a frequency domain echo suppression filter
US10306389B2 (en) 2013-03-13 2019-05-28 Kopin Corporation Head wearable acoustic system with noise canceling microphone geometry apparatuses and methods
US9257952B2 (en) * 2013-03-13 2016-02-09 Kopin Corporation Apparatuses and methods for multi-channel signal compression during desired voice activity detection
US9385779B2 (en) * 2013-10-21 2016-07-05 Cisco Technology, Inc. Acoustic echo control for automated speaker tracking systems
US11631421B2 (en) 2015-10-18 2023-04-18 Solos Technology Limited Apparatuses and methods for enhanced speech recognition in variable environments
JP6279172B2 (ja) 2015-11-16 2018-02-14 三菱電機株式会社 エコーキャンセラ装置及び通話装置
DE112015007128B4 (de) 2015-11-16 2019-07-11 Mitsubishi Electric Corporation Echolöscheinrichtung und Sprachtelekommunikationseinrichtung
WO2018006856A1 (zh) * 2016-07-07 2018-01-11 腾讯科技（深圳）有限公司 一种回声消除的方法及终端、计算机存储介质
US10192567B1 (en) * 2017-10-18 2019-01-29 Motorola Mobility Llc Echo cancellation and suppression in electronic device
EP3667662B1 (de) * 2018-12-12 2022-08-10 Panasonic Intellectual Property Corporation of America Vorrichtung zur unterdrückung von akustischem echo, verfahren zur unterdrückung von akustischem echo und programm zur unterdrückung von akustischem echo
CN112053700B (zh) * 2020-08-31 2023-02-07 浙江大华技术股份有限公司 场景识别方法、装置、电子设备以及计算机可读存储介质

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4894820A (en) * 1987-03-24 1990-01-16 Oki Electric Industry Co., Ltd. Double-talk detection in an echo canceller
JP2810052B2 (ja) * 1987-11-18 1998-10-15 株式会社日立製作所 伝送装置
US4918727A (en) * 1988-06-09 1990-04-17 Tellabs Incorporated Double talk detector for echo canceller and method
JPH0439248A (ja) * 1990-05-31 1992-02-10 Toshiba Corp 手差し給紙カセットおよびこれを用いた画像形成装置
JPH04227341A (ja) * 1991-04-30 1992-08-17 Matsushita Electric Ind Co Ltd 反響消去装置

Also Published As

Publication number Publication date
EP0627840A3 (de) 1995-09-13
JP2538176B2 (ja) 1996-09-25
JPH06338827A (ja) 1994-12-06
EP0627840A2 (de) 1994-12-07
DE69429947D1 (de) 2002-04-04
US5463618A (en) 1995-10-31
EP0627840B1 (de) 2002-02-27

Similar Documents

Publication Publication Date Title
DE69429947T2 (de) Echokompensator
DE69211211D1 (de) Echokompensator
DE69522088D1 (de) Teilbandechokompensator
DE58907772D1 (de) Echokompensator.
DK88892D0 (da) Forbindelse
ATE166584T1 (de) Anschlussstück
DE69400828D1 (de) Motor-Getriebe-Antriebsverbindung
FR2683413B1 (fr) Un annuleur d'echo.
DE69022641D1 (de) Adaptiver Echokompensator.
DE69326051D1 (de) Geisterbildauslöschung
DE69422601D1 (de) Verbindungsleitung
NO305294B1 (no) R°rhenger
DE69632426D1 (de) Akustischer Echokompensator
DE69534663D1 (de) Echo-Löscher
MC2218A1 (fr) Navire-citerne
DE59403223D1 (de) Kopplungsanordnung
DE69730428D1 (de) Echokompensatorsystem
ATA80192A (de) Rohr-nippel-verbindung
NO933444D0 (no) Linearrangement
DE59301550D1 (de) Flansch-Rohrverbindung
DE69225279D1 (de) Fernechokompensator
NO954654D0 (no) Benzimiddazolyl-diazacyklo-oktanforbindelse
DE69830959D1 (de) Echokompensator
NO952670D0 (no) Ekkokompensator
DK0667066T3 (da) Ekkokompenseringsindretning

Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee