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 processInfo
- 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
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
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Filters That Use Time-Delay Elements (AREA)
- Telephone Function (AREA)
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 (en) | 1995-05-31 | 1996-05-31 | System and method for avoiding false convergence in the presence of tones in a time-domain echo cancellation process |
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 (de) |
EP (1) | EP0829147B1 (de) |
JP (3) | JP3652705B2 (de) |
KR (1) | KR100411639B1 (de) |
CN (1) | CN1116744C (de) |
AT (1) | ATE374462T1 (de) |
AU (1) | AU5957396A (de) |
BR (1) | BR9608744A (de) |
DE (1) | DE69637266T2 (de) |
DK (1) | DK0829147T3 (de) |
ES (1) | ES2293647T3 (de) |
HK (1) | HK1010958A1 (de) |
RU (1) | RU2150174C1 (de) |
WO (1) | WO1996038933A1 (de) |
Families Citing this family (57)
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 |
WO1997045995A1 (en) * | 1996-05-31 | 1997-12-04 | Philips Electronics N.V. | Arrangement for suppressing an interfering component of an input signal |
DE69627359T2 (de) * | 1996-08-01 | 2003-10-30 | Nortel Networks Ltd., St. Laurent | Verbesserter echokompensator mit anwendung in der digitalen telefonie |
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 |
US6223194B1 (en) * | 1997-06-11 | 2001-04-24 | Nec Corporation | Adaptive filter, step size control method thereof, and record medium therefor |
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 |
US6240180B1 (en) * | 1997-11-14 | 2001-05-29 | Tellabs Operations, Inc. | Echo canceller employing dual-H architecture having split adaptive gain settings |
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 |
US6996231B2 (en) * | 2001-11-13 | 2006-02-07 | Texas Instruments Incorporated | Step size convergence control |
US6895086B2 (en) * | 2001-11-13 | 2005-05-17 | Inmate Telephone, Inc. | 3-Way call detection system and method |
US7042857B2 (en) | 2002-10-29 | 2006-05-09 | Qualcom, Incorporated | Uplink pilot and signaling transmission in wireless communication systems |
US7039001B2 (en) | 2002-10-29 | 2006-05-02 | Qualcomm, Incorporated | Channel estimation for OFDM 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 |
AU2004303075B2 (en) * | 2003-08-05 | 2009-06-25 | Dsi-Iti, Llc | Three-way call detection using steganography |
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. |
US8238923B2 (en) | 2004-12-22 | 2012-08-07 | Qualcomm Incorporated | Method of using shared resources in a communication system |
US8831115B2 (en) | 2004-12-22 | 2014-09-09 | Qualcomm Incorporated | MC-CDMA multiplexing in an orthogonal uplink |
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 |
US8542802B2 (en) | 2007-02-15 | 2013-09-24 | Global Tel*Link Corporation | System and method for three-way call detection |
US20080201158A1 (en) | 2007-02-15 | 2008-08-21 | Johnson Mark D | System and method for visitation management in a controlled-access environment |
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 |
WO2017085760A1 (ja) * | 2015-11-16 | 2017-05-26 | 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 |
CN109562211B (zh) * | 2016-08-01 | 2021-07-06 | 心脏器械股份有限公司 | 基于vad电流波形的心率确定 |
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 |
US11837248B2 (en) | 2019-12-18 | 2023-12-05 | Dolby Laboratories Licensing Corporation | Filter adaptation step size control for echo cancellation |
Family Cites Families (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4426729A (en) * | 1981-03-05 | 1984-01-17 | Bell Telephone Laboratories, Incorporated | Partial band - whole band energy discriminator |
NL8220092A (nl) * | 1981-03-05 | 1983-02-01 | Western Electric Co | Energiebanddiscriminator. |
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 (de) * | 1987-09-18 | 1989-03-22 | Siemens Aktiengesellschaft | Anordnung zum Erkennen periodischer Signale für einen Sprach-Echokompensator |
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 |
DE69123579T2 (de) * | 1991-09-06 | 1997-06-12 | Ibm | Verfahren zur adaptiven Echokompensation und Einrichtung zur Durchführung des Verfahrens |
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 (en) * | 1993-03-05 | 1997-02-18 | Akihiko Sugiyama | Method and apparatus for rapid identification of an unknown system based on an echo signal having a plurality of dispersive portions |
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 |
-
1995
- 1995-05-31 US US08/455,801 patent/US5592548A/en not_active Expired - Lifetime
-
1996
- 1996-05-31 DK DK96916826T patent/DK0829147T3/da active
- 1996-05-31 RU RU97121929A patent/RU2150174C1/ru not_active IP Right Cessation
- 1996-05-31 DE DE69637266T patent/DE69637266T2/de not_active Expired - Lifetime
- 1996-05-31 AT AT96916826T patent/ATE374462T1/de not_active IP Right Cessation
- 1996-05-31 CN CN96194234A patent/CN1116744C/zh not_active Expired - Lifetime
- 1996-05-31 JP JP53667696A patent/JP3652705B2/ja not_active Expired - Lifetime
- 1996-05-31 AU AU59573/96A patent/AU5957396A/en not_active Abandoned
- 1996-05-31 BR BR9608744A patent/BR9608744A/pt not_active IP Right Cessation
- 1996-05-31 ES ES96916826T patent/ES2293647T3/es not_active Expired - Lifetime
- 1996-05-31 EP EP96916826A patent/EP0829147B1/de not_active Expired - Lifetime
- 1996-05-31 WO PCT/US1996/008110 patent/WO1996038933A1/en active IP Right Grant
- 1996-05-31 KR KR1019970708628A patent/KR100411639B1/ko active IP Right Grant
-
1998
- 1998-08-19 HK HK98110024A patent/HK1010958A1/xx not_active IP Right Cessation
-
2002
- 2002-04-17 JP JP2002115025A patent/JP3936228B2/ja not_active Expired - Lifetime
-
2004
- 2004-11-30 JP JP2004346637A patent/JP4485925B2/ja not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JP3936228B2 (ja) | 2007-06-27 |
BR9608744A (pt) | 1999-05-04 |
AU5957396A (en) | 1996-12-18 |
RU2150174C1 (ru) | 2000-05-27 |
ES2293647T3 (es) | 2008-03-16 |
WO1996038933A1 (en) | 1996-12-05 |
JPH11506284A (ja) | 1999-06-02 |
JP2002335195A (ja) | 2002-11-22 |
DE69637266D1 (de) | 2007-11-08 |
ATE374462T1 (de) | 2007-10-15 |
DE69637266T2 (de) | 2008-06-26 |
KR100411639B1 (ko) | 2004-04-28 |
CN1185874A (zh) | 1998-06-24 |
US5592548A (en) | 1997-01-07 |
EP0829147B1 (de) | 2007-09-26 |
JP3652705B2 (ja) | 2005-05-25 |
KR19990022149A (ko) | 1999-03-25 |
JP2005110307A (ja) | 2005-04-21 |
DK0829147T3 (da) | 2008-01-02 |
JP4485925B2 (ja) | 2010-06-23 |
EP0829147A1 (de) | 1998-03-18 |
CN1116744C (zh) | 2003-07-30 |
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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 |