DE69427770T2 - Verfahren zur bestimmung der echolage in einem echokompensator - Google Patents

Verfahren zur bestimmung der echolage in einem echokompensator

Info

Publication number
DE69427770T2
DE69427770T2 DE69427770T DE69427770T DE69427770T2 DE 69427770 T2 DE69427770 T2 DE 69427770T2 DE 69427770 T DE69427770 T DE 69427770T DE 69427770 T DE69427770 T DE 69427770T DE 69427770 T2 DE69427770 T2 DE 69427770T2
Authority
DE
Germany
Prior art keywords
echo
location
pct
path
echo path
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 - Lifetime
Application number
DE69427770T
Other languages
English (en)
Other versions
DE69427770D1 (de
Inventor
Antti Vaehaetalo
Jorma Maekinen
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.)
Nokia Oyj
Original Assignee
Nokia Networks Oy
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 Nokia Networks Oy filed Critical Nokia Networks Oy
Publication of DE69427770D1 publication Critical patent/DE69427770D1/de
Application granted granted Critical
Publication of DE69427770T2 publication Critical patent/DE69427770T2/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
DE69427770T 1993-12-23 1994-12-21 Verfahren zur bestimmung der echolage in einem echokompensator Expired - Lifetime DE69427770T2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI935834A FI935834A (fi) 1993-12-23 1993-12-23 Menetelmä kaikukohtaan sovittautumiseksi kaiunpoistajassa
PCT/FI1994/000577 WO1995017784A1 (en) 1993-12-23 1994-12-21 Method for determining the location of echo in an echo cancellar

Publications (2)

Publication Number Publication Date
DE69427770D1 DE69427770D1 (de) 2001-08-23
DE69427770T2 true DE69427770T2 (de) 2002-05-23

Family

ID=8539171

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69427770T Expired - Lifetime DE69427770T2 (de) 1993-12-23 1994-12-21 Verfahren zur bestimmung der echolage in einem echokompensator

Country Status (10)

Country Link
US (1) US5737410A (de)
EP (1) EP0736235B1 (de)
JP (2) JPH09507120A (de)
CN (1) CN1068742C (de)
AT (1) ATE203360T1 (de)
AU (1) AU680981B2 (de)
DE (1) DE69427770T2 (de)
FI (1) FI935834A (de)
HK (1) HK1011472A1 (de)
WO (1) WO1995017784A1 (de)

Families Citing this family (54)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050145682A1 (en) * 1994-05-10 2005-07-07 Laser Substrates, Inc. Document enclosure mailing form for non-impact printing
IL115892A (en) * 1994-11-10 1999-05-09 British Telecomm Interference detection system for telecommunications
US5646990A (en) * 1995-09-21 1997-07-08 Rockwell International Corporation Efficient speakerphone anti-howling system
DE19543666A1 (de) * 1995-11-23 1997-05-28 Sel Alcatel Ag Echokompensator
US5914982A (en) * 1997-06-13 1999-06-22 Rockwell Semiconductor Systems, Inc. Method and apparatus for training linear equalizers in a PCM modem
US7046795B2 (en) * 1997-06-25 2006-05-16 Intel Corporation Method and apparatus for active latency characterization
FI974505A (fi) * 1997-12-12 1999-06-13 Nokia Telecommunications Oy Menetelmä akustisen kaiun poistamiseksi
US6839378B1 (en) 1998-01-12 2005-01-04 Ericsson, Inc. Method and apparatus for multipath delay estimation in direct sequence spread spectrum communication systems
US6421097B1 (en) * 1998-07-31 2002-07-16 Intel Corporation Method and apparatus for reducing flicker in a video image sequence
SE516143C2 (sv) 1999-05-10 2001-11-26 Ericsson Telefon Ab L M Skattning av ren fördröjning
KR100330237B1 (ko) * 1999-07-19 2002-03-25 윤종용 반향 지연 추정 장치 및 방법
WO2001008380A1 (en) * 1999-07-23 2001-02-01 Acoustic Technologies, Inc. Acoustic and electronic echo cancellation using high resolution delay line
US6421443B1 (en) * 1999-07-23 2002-07-16 Acoustic Technologies, Inc. Acoustic and electronic echo cancellation
GB2354414B (en) * 1999-09-14 2004-12-22 Mitel Corp Locating network echos
US6278785B1 (en) * 1999-09-21 2001-08-21 Acoustic Technologies, Inc. Echo cancelling process with improved phase control
US7164659B2 (en) * 1999-12-09 2007-01-16 Broadcom Corporation Adaptive gain control based on echo canceller performance information
DE19960051A1 (de) * 1999-12-14 2001-06-21 Alcatel Sa Verfahren zur Echounterdrückung in einem Telekommunikationssystem und Echounterdrückungseinrichtung zur Durchführung des Verfahrens
EP1995884A1 (de) * 2000-01-25 2008-11-26 Aware, Inc. System und Verfahren zur Anwendung von einem lMS Verfahren zur Aktualisierung eines Echounterdrückers in einem ADSL Modem
US7050575B1 (en) * 2000-06-16 2006-05-23 Ericsson Inc. Echo canceler coefficient update apparatus and method
US6700978B2 (en) * 2000-09-08 2004-03-02 Intel Corporation Method and apparatus for fast converging affine projection based echo canceller
JP3428637B2 (ja) * 2000-11-27 2003-07-22 日本電気株式会社 Ｃｄｍａ受信機のマルチパス検出方法および回路
US6768796B2 (en) * 2001-02-05 2004-07-27 3Com Corporation System and method for echo cancellation
GB2379369B (en) * 2001-08-29 2005-06-29 Zarlink Semiconductor Inc Subband echo location and double-talk detection in communication systems
KR100477638B1 (ko) * 2001-09-11 2005-03-23 삼성전자주식회사 ２ｄ／３ｄ 겸용 디스플레이
CA2477097A1 (en) * 2002-02-22 2003-08-28 Pixology Software Limited Detection and correction of red-eye features in digital images
US7043014B2 (en) * 2002-05-22 2006-05-09 Avaya Technology Corp. Apparatus and method for time-alignment of two signals
US7027593B2 (en) * 2002-05-22 2006-04-11 Avaya Technology Corp. Apparatus and method for echo control
AU2003247408A1 (en) * 2002-05-23 2003-12-12 Analog Devices, Inc. Time delay estimation for equalisation
US6961423B2 (en) 2002-06-24 2005-11-01 Freescale Semiconductor, Inc. Method and apparatus for performing adaptive filtering
US7388954B2 (en) * 2002-06-24 2008-06-17 Freescale Semiconductor, Inc. Method and apparatus for tone indication
US7215765B2 (en) * 2002-06-24 2007-05-08 Freescale Semiconductor, Inc. Method and apparatus for pure delay estimation in a communication system
US7242762B2 (en) * 2002-06-24 2007-07-10 Freescale Semiconductor, Inc. Monitoring and control of an adaptive filter in a communication system
CN100452929C (zh) * 2002-11-29 2009-01-14 Tcl王牌电子(深圳)有限公司 以回声抵消测量非消声室扬声器方法
US20040252652A1 (en) * 2003-06-10 2004-12-16 Alexander Berestesky Cross correlation, bulk delay estimation, and echo cancellation
ATE426274T1 (de) * 2004-01-29 2009-04-15 Nxp Bv Echolíscher mit durch stírungspegel gesteuerter schrittgrísse
ES2247916B1 (es) * 2004-03-16 2007-04-01 Egatel, S.L. Procedimiento y dispositivo de cancelacion de ecos.
US7386142B2 (en) * 2004-05-27 2008-06-10 Starkey Laboratories, Inc. Method and apparatus for a hearing assistance system with adaptive bulk delay
US8457614B2 (en) * 2005-04-07 2013-06-04 Clearone Communications, Inc. Wireless multi-unit conference phone
US20080219432A1 (en) * 2005-06-01 2008-09-11 Tecteon Pic Echo Delay Detector
US7734034B1 (en) 2005-06-21 2010-06-08 Avaya Inc. Remote party speaker phone detection
DK2080408T3 (da) * 2006-10-23 2012-11-19 Starkey Lab Inc Undgåelse af medrivning med et auto-regressivt filter
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
JP4621266B2 (ja) * 2008-03-25 2011-01-26 富士通株式会社 測定方法、エコー発生箇所特定方法、測定装置、およびエコー発生箇所特定装置
US8571244B2 (en) 2008-03-25 2013-10-29 Starkey Laboratories, Inc. Apparatus and method for dynamic detection and attenuation of periodic acoustic feedback
EP2197190B1 (de) 2008-12-12 2011-05-04 Global IP Solutions (GIPS) AB Verzögerungsschätzgerät
US8452002B2 (en) 2009-09-18 2013-05-28 At&T Intellectual Property I, L.P. Methods, apparatus and articles of manufacture to cancel echo for communication paths having long bulk delays
US8942398B2 (en) 2010-04-13 2015-01-27 Starkey Laboratories, Inc. Methods and apparatus for early audio feedback cancellation for hearing assistance devices
US8917891B2 (en) 2010-04-13 2014-12-23 Starkey Laboratories, Inc. Methods and apparatus for allocating feedback cancellation resources for hearing assistance devices
US9654885B2 (en) 2010-04-13 2017-05-16 Starkey Laboratories, Inc. Methods and apparatus for allocating feedback cancellation resources for hearing assistance devices
US20120195438A1 (en) * 2011-01-28 2012-08-02 Mitel Networks Corporation Echo suppression for wireless handsets and headsets
WO2013184130A1 (en) * 2012-06-08 2013-12-12 Intel Corporation Echo cancellation algorithm for long delayed echo
CN109920444B (zh) * 2017-12-13 2021-04-27 中国电信股份有限公司 回声时延的检测方法、装置以及计算机可读存储介质
CN110610716A (zh) * 2019-09-26 2019-12-24 北京声智科技有限公司 回声消除方法、装置及存储介质

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4491701A (en) * 1981-03-05 1985-01-01 At&T Bell Laboratories Adaptive filter including a far end energy discriminator
US4468641A (en) * 1982-06-28 1984-08-28 At&T Bell Laboratories Adaptive filter update normalization
US4582963A (en) * 1982-07-29 1986-04-15 Rockwell International Corporation Echo cancelling using adaptive bulk delay and filter
US4587382A (en) * 1982-07-29 1986-05-06 Gte Lenkurt Incorporated Echo canceller using end delay measurement
FR2538975A1 (fr) * 1982-12-30 1984-07-06 Trt Telecom Radio Electr Procede utilise dans un dispositif d'annulation d'echo pour la mesure d'un retard d'echo et dispositif de mise en oeuvre de ce procede
FR2540314A1 (fr) * 1983-01-31 1984-08-03 Trt Telecom Radio Electr Procede d'initialisation des coefficients de filtres dans un dispositif d'annulation d'echos proche et lointain et dispositif de mise en oeuvre de ce procede
US4562312A (en) * 1983-02-17 1985-12-31 At&T Bell Laboratories Subsampling delay estimator for an echo canceler
EP0130263B1 (de) * 1983-06-30 1988-06-01 International Business Machines Corporation Startverfahren für einen Echokompensationsfilter und dieses Verfahren anwendendes Nachrichtenübertragungssystem
DE3475152D1 (en) * 1984-05-23 1988-12-15 Ibm Buffer device used in a voice transmission network
US4591669A (en) * 1984-09-26 1986-05-27 At&T Bell Laboratories Adaptive filter update gain normalization
EP0199879B1 (de) * 1985-04-30 1990-03-21 International Business Machines Corporation Verfahren und Vorrichtung zur Echoannullierung in einem Übertragungsnetzwerk
DE3585034D1 (de) * 1985-10-30 1992-02-06 Ibm Verfahren zur bestimmung einer flachen echopfadverzoegerung und dieses verfahren verwendender echokompensator.
US4823382A (en) * 1986-10-01 1989-04-18 Racal Data Communications Inc. Echo canceller with dynamically positioned adaptive filter taps
WO1988007792A1 (en) * 1987-03-27 1988-10-06 Universal Data Systems, Inc. Modem with improved remote echo location and cancellation
US4991166A (en) * 1988-10-28 1991-02-05 Shure Brothers Incorporated Echo reduction circuit
IT1228106B (it) * 1988-12-21 1991-05-28 Sits Soc It Telecom Siemens Procedimento e dispositivo per la cancellazione numerica adattativa dell'eco generato in collegamenti telefonici con caratteristiche varianti nel tempo
CA2060667C (en) * 1992-02-05 1998-12-08 Paul Marc Yatrou Adaptive sparse echo canceller using a sub-rate filter for active tap selection
IT1254819B (it) * 1992-02-24 1995-10-11 Sits Soc It Telecom Siemens Procedimento e dispositivo per la cancellazione numerica adattativa dell'eco generato in collegamenti telefonici non stazionari

Also Published As

Publication number Publication date
CN1139501A (zh) 1997-01-01
HK1011472A1 (en) 1999-07-09
JPH09507120A (ja) 1997-07-15
EP0736235A1 (de) 1996-10-09
DE69427770D1 (de) 2001-08-23
US5737410A (en) 1998-04-07
EP0736235B1 (de) 2001-07-18
FI935834A (fi) 1995-06-24
AU680981B2 (en) 1997-08-14
FI935834A0 (fi) 1993-12-23
CN1068742C (zh) 2001-07-18
JP2006191650A (ja) 2006-07-20
WO1995017784A1 (en) 1995-06-29
ATE203360T1 (de) 2001-08-15
AU1274895A (en) 1995-07-10

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