HK1010958A1 - System and method for avoiding false convergence in the presence of tones in a time-domain echo cancellation process - Google Patents

System and method for avoiding false convergence in the presence of tones in a time-domain echo cancellation process

Info

Publication number
HK1010958A1
HK1010958A1 HK98110024A HK98110024A HK1010958A1 HK 1010958 A1 HK1010958 A1 HK 1010958A1 HK 98110024 A HK98110024 A HK 98110024A HK 98110024 A HK98110024 A HK 98110024A HK 1010958 A1 HK1010958 A1 HK 1010958A1
Authority
HK
Hong Kong
Prior art keywords
tones
echo
signal
convergence
time
Prior art date
Application number
HK98110024A
Other languages
English (en)
Inventor
Gilbert C Shih
Original Assignee
Qualcomm 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 Qualcomm Inc filed Critical Qualcomm Inc
Publication of HK1010958A1 publication Critical patent/HK1010958A1/xx

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B3/00Line transmission systems
    • H04B3/02Details
    • H04B3/20Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other
    • H04B3/23Reducing 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
HK98110024A 1995-05-31 1998-08-19 System and method for avoiding false convergence in the presence of tones in a time-domain echo cancellation process HK1010958A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/455,801 US5592548A (en) 1995-05-31 1995-05-31 System and method for avoiding false convergence in the presence of tones in a time-domain echo cancellation process
PCT/US1996/008110 WO1996038933A1 (fr) 1995-05-31 1996-05-31 Systeme et procede empechant la convergence intempestive en presence de signaux sonores dans un processus d'annulation d'echo de dimension temporelle

Publications (1)

Publication Number Publication Date
HK1010958A1 true HK1010958A1 (en) 1999-07-02

Family

ID=23810325

Family Applications (1)

Application Number Title Priority Date Filing Date
HK98110024A HK1010958A1 (en) 1995-05-31 1998-08-19 System and method for avoiding false convergence in the presence of tones in a time-domain echo cancellation process

Country Status (14)

Country Link
US (1) US5592548A (fr)
EP (1) EP0829147B1 (fr)
JP (3) JP3652705B2 (fr)
KR (1) KR100411639B1 (fr)
CN (1) CN1116744C (fr)
AT (1) ATE374462T1 (fr)
AU (1) AU5957396A (fr)
BR (1) BR9608744A (fr)
DE (1) DE69637266T2 (fr)
DK (1) DK0829147T3 (fr)
ES (1) ES2293647T3 (fr)
HK (1) HK1010958A1 (fr)
RU (1) RU2150174C1 (fr)
WO (1) WO1996038933A1 (fr)

Families Citing this family (57)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2586441B2 (ja) * 1994-07-27 1997-02-26 日本電気株式会社 移動電話機
US5689556A (en) * 1995-09-15 1997-11-18 Hughes Electronics Method of detecting narrow-band signals in an echo canceller
DE69738288T2 (de) * 1996-05-31 2008-09-25 Koninklijke Philips Electronics N.V. Einrichtung zur unterdrückung einer störenden komponente eines eingangssignals
WO1998006185A1 (fr) * 1996-08-01 1998-02-12 Northern Telecom Limited Compensateur d'echo pour systemes de telephonie numerique
US6141406A (en) * 1997-03-27 2000-10-31 T-Netix, Inc. Method and apparatus for detecting a secondary destination of a telephone call based on changes in the telephone signal path
AU739217C (en) * 1997-06-11 2002-06-06 Nec Corporation Adaptive filter, step size control method thereof, and record medium therefor
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
US6240180B1 (en) * 1997-11-14 2001-05-29 Tellabs Operations, Inc. Echo canceller employing dual-H architecture having split adaptive gain settings
US6028929A (en) * 1997-11-14 2000-02-22 Tellabs Operations, Inc. Echo canceller employing dual-H architecture having improved non-linear echo path detection
US6049606A (en) * 1997-12-11 2000-04-11 Nortel Networks Corporation Circuit and method of double talk detection for use in handsfree telephony terminals
JP3443302B2 (ja) * 1998-01-08 2003-09-02 三洋電機株式会社 周期信号検出器
US7039182B1 (en) 1999-05-28 2006-05-02 3Com Corporation Echo canceller having improved noise immunity
US6654463B1 (en) 1999-05-28 2003-11-25 3Com Corporation Round trip delay estimator and compensator for the echo canceller
US6658055B1 (en) * 1999-07-16 2003-12-02 Arris International, Inc. Method for accelerating the training of adaptive echo cancelers in the presence of interfering sinusoidal signals
US6580793B1 (en) * 1999-08-31 2003-06-17 Lucent Technologies Inc. Method and apparatus for echo cancellation with self-deactivation
US7006458B1 (en) * 2000-08-16 2006-02-28 3Com Corporation Echo canceller disabler for modulated data signals
US6721673B2 (en) * 2001-06-12 2004-04-13 National Instruments Corporation Estimating a plurality of tones in an input signal
KR20030023216A (ko) * 2001-09-12 2003-03-19 주식회사 텔루션 디지털 이동통신 시스템에서의 반향경로 예측을 이용한반향제거시스템 및 반향제거방법
US6895086B2 (en) * 2001-11-13 2005-05-17 Inmate Telephone, Inc. 3-Way call detection system and method
US6996231B2 (en) * 2001-11-13 2006-02-07 Texas Instruments Incorporated Step size convergence control
US7039001B2 (en) 2002-10-29 2006-05-02 Qualcomm, Incorporated Channel estimation for OFDM communication systems
US7042857B2 (en) 2002-10-29 2006-05-09 Qualcom, Incorporated Uplink pilot and signaling transmission in wireless communication systems
US7177297B2 (en) 2003-05-12 2007-02-13 Qualcomm Incorporated Fast frequency hopping with a code division multiplexed pilot in an OFDMA system
JP2005033771A (ja) * 2003-06-16 2005-02-03 Matsushita Electric Ind Co Ltd エコーキャンセル装置、エコーキャンセル方法および記録媒体
CA2534767A1 (fr) * 2003-08-05 2005-03-17 Inmate Telephone, Inc. Detection de conference telephonique a trois faisant appel a la steganographie
US8611283B2 (en) 2004-01-28 2013-12-17 Qualcomm Incorporated Method and apparatus of using a single channel to provide acknowledgement and assignment messages
GB2410661A (en) * 2004-01-30 2005-08-03 Mitel Networks Corp Narrow band tone detection in echo cancelling system
US8891349B2 (en) 2004-07-23 2014-11-18 Qualcomm Incorporated Method of optimizing portions of a frame
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.
US8831115B2 (en) 2004-12-22 2014-09-09 Qualcomm Incorporated MC-CDMA multiplexing in an orthogonal uplink
US8238923B2 (en) 2004-12-22 2012-08-07 Qualcomm Incorporated Method of using shared resources in a communication system
NO328256B1 (no) * 2004-12-29 2010-01-18 Tandberg Telecom As Audiosystem
US8763022B2 (en) * 2005-12-12 2014-06-24 Nielsen Company (Us), Llc Systems and methods to wirelessly meter audio/visual devices
US9015740B2 (en) 2005-12-12 2015-04-21 The Nielsen Company (Us), Llc Systems and methods to wirelessly meter audio/visual devices
JP4752494B2 (ja) * 2005-12-22 2011-08-17 沖電気工業株式会社 エコーキャンセラ
US8920343B2 (en) 2006-03-23 2014-12-30 Michael Edward Sabatino Apparatus for acquiring and processing of physiological auditory signals
JP2008113371A (ja) * 2006-10-31 2008-05-15 Oki Electric Ind Co Ltd エコーキャンセラ及びエコーキャンセル方法
US20080201158A1 (en) 2007-02-15 2008-08-21 Johnson Mark D System and method for visitation management in a controlled-access environment
US8542802B2 (en) 2007-02-15 2013-09-24 Global Tel*Link Corporation System and method for three-way call detection
US8121260B2 (en) * 2007-03-22 2012-02-21 Audiocodes Ltd. Method and apparatus for retraining of echo cancellation
JP2008294576A (ja) * 2007-05-22 2008-12-04 Panasonic Electric Works Co Ltd インターホン装置
US9124769B2 (en) * 2008-10-31 2015-09-01 The Nielsen Company (Us), Llc Methods and apparatus to verify presentation of media content
US8498407B2 (en) * 2008-12-02 2013-07-30 Qualcomm Incorporated Systems and methods for double-talk detection in acoustically harsh environments
US8630726B2 (en) * 2009-02-12 2014-01-14 Value-Added Communications, Inc. System and method for detecting three-way call circumvention attempts
US9225838B2 (en) 2009-02-12 2015-12-29 Value-Added Communications, Inc. System and method for detecting three-way call circumvention attempts
CN102118530B (zh) * 2010-01-06 2013-08-14 杭州华三通信技术有限公司 一种回声消除的方法和装置
GB201501791D0 (en) 2015-02-03 2015-03-18 Microsoft Technology Licensing Llc Non-linear echo path detection
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
US10572961B2 (en) 2016-03-15 2020-02-25 Global Tel*Link Corporation Detection and prevention of inmate to inmate message relay
US9609121B1 (en) 2016-04-07 2017-03-28 Global Tel*Link Corporation System and method for third party monitoring of voice and video calls
US10420870B2 (en) * 2016-08-01 2019-09-24 Heartware, Inc. Heart rate determination based on VAD current waveform
US10027797B1 (en) 2017-05-10 2018-07-17 Global Tel*Link Corporation Alarm control for inmate call monitoring
US10225396B2 (en) 2017-05-18 2019-03-05 Global Tel*Link Corporation Third party monitoring of a activity within a monitoring platform
US10860786B2 (en) 2017-06-01 2020-12-08 Global Tel*Link Corporation System and method for analyzing and investigating communication data from a controlled environment
US9930088B1 (en) 2017-06-22 2018-03-27 Global Tel*Link Corporation Utilizing VoIP codec negotiation during a controlled environment call
EP4078577A1 (fr) 2019-12-18 2022-10-26 Dolby Laboratories Licensing Corp. Commande de taille de pas d'adaptation de filtre pour annulation d'écho

Family Cites Families (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3235915T1 (de) * 1981-03-05 1983-11-17 Western Electric Co., Inc., 10038 New York, N.Y. Energiebanddiskriminator
US4426729A (en) * 1981-03-05 1984-01-17 Bell Telephone Laboratories, Incorporated Partial band - whole band energy discriminator
US4467441A (en) * 1982-10-08 1984-08-21 At&T Bell Laboratories Adaptive filter including controlled tap coefficient leakage
JPS59151546A (ja) * 1983-02-18 1984-08-30 Nec Corp 適応形反響消去装置
US4823382A (en) * 1986-10-01 1989-04-18 Racal Data Communications Inc. Echo canceller with dynamically positioned adaptive filter taps
EP0307765A1 (fr) * 1987-09-18 1989-03-22 Siemens Aktiengesellschaft Dispositif pour détecter des signaux périodiques pour un compensateur d'échos vocaux
US4918727A (en) * 1988-06-09 1990-04-17 Tellabs Incorporated Double talk detector for echo canceller and method
US4912758A (en) * 1988-10-26 1990-03-27 International Business Machines Corporation Full-duplex digital speakerphone
DE3840433A1 (de) * 1988-12-01 1990-06-07 Philips Patentverwaltung Echokompensator
FR2651077B1 (fr) * 1989-08-18 1994-06-10 Letourneur Gregoire Dispositif de traitement d'echo notamment acoustique dans une ligne telephonique
JPH03171810A (ja) * 1989-11-29 1991-07-25 Fujitsu Ltd エコーキャンセラ
JP2836277B2 (ja) * 1991-03-14 1998-12-14 国際電信電話株式会社 エコーキャンセル装置
JP2794999B2 (ja) * 1991-08-14 1998-09-10 国際電信電話株式会社 エコーキャンセル方式
EP0530423B1 (fr) * 1991-09-06 1996-12-11 International Business Machines Corporation Procédé d'annulation adaptative d'écho et dispositif pour la mise en oeuvre de ce procédé
SE469677B (sv) * 1992-01-10 1993-08-16 Ericsson Telefon Ab L M Anordning foer att minska risken foer en icke oenskad parameterdrift hos ett adaptivt filter som anvaends foer ekoeliminering
US5295136A (en) * 1992-04-13 1994-03-15 Motorola, Inc. Method of performing convergence in a, least mean square, adaptive filter, echo canceller
US5319702A (en) * 1992-07-29 1994-06-07 Tele-Matic Corporation Method and apparatus for detecting and responding to hook flash events occurring on a remote telephone
US5307405A (en) * 1992-09-25 1994-04-26 Qualcomm Incorporated Network echo canceller
CA2117035C (fr) * 1993-03-05 1997-02-18 Akihiko Sugiyama Methode et appareil de reconnaissance rapide de systemes meme en presence d'une multiplicite de parties de signal dispersives
US5390244A (en) * 1993-09-10 1995-02-14 Polycom, Inc. Method and apparatus for periodic signal detection
US5546459A (en) * 1993-11-01 1996-08-13 Qualcomm Incorporated Variable block size adaptation algorithm for noise-robust acoustic echo cancellation

Also Published As

Publication number Publication date
AU5957396A (en) 1996-12-18
BR9608744A (pt) 1999-05-04
US5592548A (en) 1997-01-07
WO1996038933A1 (fr) 1996-12-05
JP3652705B2 (ja) 2005-05-25
DK0829147T3 (da) 2008-01-02
EP0829147A1 (fr) 1998-03-18
DE69637266D1 (de) 2007-11-08
ES2293647T3 (es) 2008-03-16
JP2002335195A (ja) 2002-11-22
RU2150174C1 (ru) 2000-05-27
JP3936228B2 (ja) 2007-06-27
EP0829147B1 (fr) 2007-09-26
JP2005110307A (ja) 2005-04-21
JPH11506284A (ja) 1999-06-02
KR100411639B1 (ko) 2004-04-28
DE69637266T2 (de) 2008-06-26
JP4485925B2 (ja) 2010-06-23
ATE374462T1 (de) 2007-10-15
CN1116744C (zh) 2003-07-30
CN1185874A (zh) 1998-06-24
KR19990022149A (ko) 1999-03-25

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Legal Events

Date Code Title Description
PC Patent ceased (i.e. patent has lapsed due to the failure to pay the renewal fee)

Effective date: 20110531