WO1997023055A1 - Method and device for echo cancellation using power estimation in a residual signal - Google Patents
Method and device for echo cancellation using power estimation in a residual signal Download PDFInfo
- Publication number
- WO1997023055A1 WO1997023055A1 PCT/SE1996/001610 SE9601610W WO9723055A1 WO 1997023055 A1 WO1997023055 A1 WO 1997023055A1 SE 9601610 W SE9601610 W SE 9601610W WO 9723055 A1 WO9723055 A1 WO 9723055A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- power estimate
- residual
- residual signal
- linear
- dynamic threshold
- 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
Abstract
Description
Claims
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU11552/97A AU723722B2 (en) | 1995-12-18 | 1996-12-06 | Method and device for echo cancellation using power estimation in a residual signal |
EP96942704A EP0868787B1 (en) | 1995-12-18 | 1996-12-06 | Method and device for echo cancellation using power estimation in a residual signal |
JP9522699A JP2000502229A (en) | 1995-12-18 | 1996-12-06 | Method and apparatus for echo cancellation using power estimation in residual signal |
DE69633458T DE69633458T2 (en) | 1995-12-18 | 1996-12-06 | METHOD AND DEVICE FOR ECHOUNTRY SUPPRESSION USING THE EFFICIENCY ESTIMATION OF THE RESTSIGNAL |
KR1019980704390A KR100308226B1 (en) | 1995-12-18 | 1996-12-06 | Method and device for echo cancellation using power estimation in a residual signal |
BR9612049A BR9612049A (en) | 1995-12-18 | 1996-12-06 | Echo cancellation process and echo canceller |
US09/098,506 US6195430B1 (en) | 1995-12-18 | 1998-06-17 | Method and device for echo cancellation using power estimation in a residual signal |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE9504520-9 | 1995-12-18 | ||
SE9504520A SE505692C2 (en) | 1995-12-18 | 1995-12-18 | Method and apparatus for echo extinguishing by estimating residual signal power |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/098,506 Continuation US6195430B1 (en) | 1995-12-18 | 1998-06-17 | Method and device for echo cancellation using power estimation in a residual signal |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1997023055A1 true WO1997023055A1 (en) | 1997-06-26 |
Family
ID=20400627
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/SE1996/001610 WO1997023055A1 (en) | 1995-12-18 | 1996-12-06 | Method and device for echo cancellation using power estimation in a residual signal |
Country Status (10)
Country | Link |
---|---|
US (1) | US6195430B1 (en) |
EP (1) | EP0868787B1 (en) |
JP (1) | JP2000502229A (en) |
KR (1) | KR100308226B1 (en) |
AU (1) | AU723722B2 (en) |
BR (1) | BR9612049A (en) |
CA (1) | CA2240726A1 (en) |
DE (1) | DE69633458T2 (en) |
SE (1) | SE505692C2 (en) |
WO (1) | WO1997023055A1 (en) |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1999013596A2 (en) | 1997-09-10 | 1999-03-18 | Telefonaktiebolaget Lm Ericsson | Method and apparatus for echo estimation and suppression |
FR2770361A1 (en) * | 1997-10-24 | 1999-04-30 | Mitel Corp | NON-LINEAR PROCESSOR FOR ACOUSTIC ECHO SUPPRESSOR |
WO1999029094A1 (en) * | 1997-12-02 | 1999-06-10 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and apparatus for cancelling echo originating from a mobile terminal |
WO1999035814A2 (en) * | 1998-01-09 | 1999-07-15 | Ericsson Inc. | Methods and apparatus for improved echo suppression in communications systems |
GB2341066A (en) * | 1998-08-20 | 2000-03-01 | Mitel Corp | Adaptive echo canceller removes non-linear signals |
EP1163779A1 (en) * | 2000-01-13 | 2001-12-19 | Motorola, Inc. | Method and system for detecting and controlling severe echo |
JP2002101023A (en) * | 2000-09-25 | 2002-04-05 | Kyocera Corp | Echo canceller |
US6687372B1 (en) | 1999-05-10 | 2004-02-03 | Telefonaktiebolaget Lm Ericsson (Publ) | Pure delay estimation |
EP1446894A1 (en) * | 2001-11-20 | 2004-08-18 | Ricoh Company, Ltd. | Echo canceller ensuring further reduction in residual echo |
US7450714B2 (en) * | 1997-11-14 | 2008-11-11 | Tellabs Operations, Inc. | Echo canceller having improved non-linear processor |
EP2988301A3 (en) * | 2014-07-31 | 2016-06-01 | Fujitsu Limited | Echo suppression device and echo suppression method |
Families Citing this family (26)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6028929A (en) * | 1997-11-14 | 2000-02-22 | Tellabs Operations, Inc. | Echo canceller employing dual-H architecture having improved non-linear echo path detection |
US6658107B1 (en) * | 1998-10-23 | 2003-12-02 | Telefonaktiebolaget Lm Ericsson (Publ) | Methods and apparatus for providing echo suppression using frequency domain nonlinear processing |
US6687373B1 (en) * | 1999-08-24 | 2004-02-03 | Nortel Networks Limited | Heusristics for optimum beta factor and filter order determination in echo canceler systems |
US6694019B1 (en) * | 1999-08-26 | 2004-02-17 | Nortel Networks Limited | Method and apparatus for infinite return loss handler for network echo canceller |
US6766020B1 (en) * | 2001-02-23 | 2004-07-20 | 3Com Corporation | System and method for comfort noise generation |
KR100477638B1 (en) * | 2001-09-11 | 2005-03-23 | 삼성전자주식회사 | 2D/3D convertible display |
US6961422B2 (en) * | 2001-12-28 | 2005-11-01 | Avaya Technology Corp. | Gain control method for acoustic echo cancellation and suppression |
US7242762B2 (en) * | 2002-06-24 | 2007-07-10 | Freescale Semiconductor, Inc. | Monitoring and control of an adaptive filter in a communication system |
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 |
US6961423B2 (en) | 2002-06-24 | 2005-11-01 | Freescale Semiconductor, Inc. | Method and apparatus for performing adaptive filtering |
US7672445B1 (en) * | 2002-11-15 | 2010-03-02 | Fortemedia, Inc. | Method and system for nonlinear echo suppression |
US7003099B1 (en) * | 2002-11-15 | 2006-02-21 | Fortmedia, Inc. | Small array microphone for acoustic echo cancellation and noise suppression |
US7319748B2 (en) * | 2003-01-08 | 2008-01-15 | Nxp B.V. | Device and method for suppressing echo in telephones |
US7099458B2 (en) * | 2003-12-12 | 2006-08-29 | Motorola, Inc. | Downlink activity and double talk probability detector and method for an echo canceler circuit |
US7680265B2 (en) * | 2003-12-12 | 2010-03-16 | Continental Automotive Systems, Inc. | Echo canceler circuit and method |
US7599483B2 (en) * | 2003-12-12 | 2009-10-06 | Temic Automotive Of North America, Inc. | Echo canceler circuit and method |
US7046794B2 (en) | 2003-12-12 | 2006-05-16 | Motorola, Inc. | Double talk activity detector and method for an echo canceler circuit |
FR2866494A1 (en) * | 2004-02-18 | 2005-08-19 | Cit Alcatel | Echo reducing device for use in e.g. communication server, has management module that is charged to vary reference threshold in dynamic manner, during convergence phase of level of residual echo signal towards threshold |
US7523035B2 (en) * | 2004-07-26 | 2009-04-21 | Motorola, Inc. | Hands-free circuit and method for communicating with a wireless device |
EP1691490B1 (en) * | 2005-02-11 | 2008-08-13 | Mitel Networks Corporation | Method of measuring distortion and determining residue-echo threshold in loop trunk circuits |
JP4509126B2 (en) * | 2007-01-24 | 2010-07-21 | 沖電気工業株式会社 | Echo canceller and echo cancellation method |
JP4877083B2 (en) * | 2007-06-12 | 2012-02-15 | 沖電気工業株式会社 | Residual echo suppression control device, method and program |
JP4456622B2 (en) * | 2007-07-25 | 2010-04-28 | 沖電気工業株式会社 | Double talk detector, double talk detection method and echo canceller |
CN102165707B (en) * | 2008-09-24 | 2013-12-04 | 三菱电机株式会社 | Echo cancelling device |
US8861713B2 (en) * | 2013-03-17 | 2014-10-14 | Texas Instruments Incorporated | Clipping based on cepstral distance for acoustic echo canceller |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4577071A (en) * | 1982-10-15 | 1986-03-18 | British Telecommunications | Echo canceller with adaptive residual center clipper controlled by echo estimate |
US5274705A (en) * | 1991-09-24 | 1993-12-28 | Tellabs Inc. | Nonlinear processor for an echo canceller and method |
US5327495A (en) * | 1992-10-23 | 1994-07-05 | Dsc Communications Corporation | Apparatus and method for controlling an echo canceler |
WO1995019085A1 (en) * | 1994-01-07 | 1995-07-13 | Ericsson Inc. | Echo canceller using a center clipper with threshold set according to estimated echo |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
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IT1208769B (en) * | 1983-10-12 | 1989-07-10 | Cselt Centro Studi Lab Telecom | THERISTICS VARIATIONS OVER TIME PROCEDURE AND DEVICE FOR THE NUMERICAL CANCELLATION OF THE ECO GENERATED IN CONNECTIONS WITH CARAT |
FR2564667B1 (en) * | 1984-05-15 | 1986-09-19 | Trt Telecom Radio Electr | DEVICE FOR CONTROLLING AN ECHO CANCELER AND A CENTER SCREENER |
US4894820A (en) * | 1987-03-24 | 1990-01-16 | Oki Electric Industry Co., Ltd. | Double-talk detection in an echo canceller |
JP2608074B2 (en) * | 1987-11-02 | 1997-05-07 | 沖電気工業株式会社 | Echo canceller |
US4879745A (en) * | 1988-10-12 | 1989-11-07 | Ibm Corporation | Half-duplex speakerphone |
US5157653A (en) | 1990-08-03 | 1992-10-20 | Coherent Communications Systems Corp. | Residual echo elimination with proportionate noise injection |
NL9002790A (en) * | 1990-12-18 | 1992-07-16 | Philips Nv | ECHO COMPENSATOR WITH IMPROVED DOUBLE-VOICE DETECTION. |
JP2626437B2 (en) | 1992-12-28 | 1997-07-02 | 日本電気株式会社 | Residual echo control device |
-
1995
- 1995-12-18 SE SE9504520A patent/SE505692C2/en not_active IP Right Cessation
-
1996
- 1996-12-06 KR KR1019980704390A patent/KR100308226B1/en not_active IP Right Cessation
- 1996-12-06 WO PCT/SE1996/001610 patent/WO1997023055A1/en active IP Right Grant
- 1996-12-06 JP JP9522699A patent/JP2000502229A/en active Pending
- 1996-12-06 EP EP96942704A patent/EP0868787B1/en not_active Expired - Lifetime
- 1996-12-06 AU AU11552/97A patent/AU723722B2/en not_active Expired
- 1996-12-06 DE DE69633458T patent/DE69633458T2/en not_active Expired - Lifetime
- 1996-12-06 CA CA002240726A patent/CA2240726A1/en not_active Abandoned
- 1996-12-06 BR BR9612049A patent/BR9612049A/en not_active IP Right Cessation
-
1998
- 1998-06-17 US US09/098,506 patent/US6195430B1/en not_active Expired - Lifetime
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4577071A (en) * | 1982-10-15 | 1986-03-18 | British Telecommunications | Echo canceller with adaptive residual center clipper controlled by echo estimate |
US5274705A (en) * | 1991-09-24 | 1993-12-28 | Tellabs Inc. | Nonlinear processor for an echo canceller and method |
US5327495A (en) * | 1992-10-23 | 1994-07-05 | Dsc Communications Corporation | Apparatus and method for controlling an echo canceler |
WO1995019085A1 (en) * | 1994-01-07 | 1995-07-13 | Ericsson Inc. | Echo canceller using a center clipper with threshold set according to estimated echo |
Cited By (26)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1999013596A3 (en) * | 1997-09-10 | 1999-05-27 | Ericsson Telefon Ab L M | Method and apparatus for echo estimation and suppression |
US6466666B1 (en) | 1997-09-10 | 2002-10-15 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and apparatus for echo estimation and suppression |
WO1999013596A2 (en) | 1997-09-10 | 1999-03-18 | Telefonaktiebolaget Lm Ericsson | Method and apparatus for echo estimation and suppression |
JP2001516986A (en) * | 1997-09-10 | 2001-10-02 | テレフオンアクチーボラゲツト エル エム エリクソン(パブル) | Method and apparatus for estimating and suppressing echo |
US6282286B1 (en) | 1997-10-24 | 2001-08-28 | Mitel Corporation | Nonlinear processor for acoustic echo canceller with background noise preservation and long echo tail suppression |
FR2770361A1 (en) * | 1997-10-24 | 1999-04-30 | Mitel Corp | NON-LINEAR PROCESSOR FOR ACOUSTIC ECHO SUPPRESSOR |
US7450714B2 (en) * | 1997-11-14 | 2008-11-11 | Tellabs Operations, Inc. | Echo canceller having improved non-linear processor |
US6256384B1 (en) | 1997-12-02 | 2001-07-03 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and apparatus for cancelling echo originating from a mobile terminal |
GB2349557A (en) * | 1997-12-02 | 2000-11-01 | Ericsson Telefon Ab L M | Method and apparatus for cancelling echo originating from a mobile terminal |
AU751482B2 (en) * | 1997-12-02 | 2002-08-15 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and apparatus for cancelling echo originating from a mobile terminal |
WO1999029094A1 (en) * | 1997-12-02 | 1999-06-10 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and apparatus for cancelling echo originating from a mobile terminal |
GB2349557B (en) * | 1997-12-02 | 2002-12-04 | Ericsson Telefon Ab L M | Method and apparatus for cancelling echo originating from a mobile terminal |
AU754246B2 (en) * | 1998-01-09 | 2002-11-07 | Ericsson Inc. | Methods and apparatus for improved echo suppression in communications systems |
WO1999035814A3 (en) * | 1998-01-09 | 1999-09-10 | Ericsson Inc | Methods and apparatus for improved echo suppression in communications systems |
WO1999035814A2 (en) * | 1998-01-09 | 1999-07-15 | Ericsson Inc. | Methods and apparatus for improved echo suppression in communications systems |
GB2341066A (en) * | 1998-08-20 | 2000-03-01 | Mitel Corp | Adaptive echo canceller removes non-linear signals |
US6687372B1 (en) | 1999-05-10 | 2004-02-03 | Telefonaktiebolaget Lm Ericsson (Publ) | Pure delay estimation |
EP1163779A4 (en) * | 2000-01-13 | 2002-11-05 | Motorola Inc | Method and system for detecting and controlling severe echo |
EP1163779A1 (en) * | 2000-01-13 | 2001-12-19 | Motorola, Inc. | Method and system for detecting and controlling severe echo |
JP2002101023A (en) * | 2000-09-25 | 2002-04-05 | Kyocera Corp | Echo canceller |
JP4503158B2 (en) * | 2000-09-25 | 2010-07-14 | 京セラ株式会社 | Echo canceller |
EP1446894A1 (en) * | 2001-11-20 | 2004-08-18 | Ricoh Company, Ltd. | Echo canceller ensuring further reduction in residual echo |
EP1446894A4 (en) * | 2001-11-20 | 2006-02-01 | Ricoh Kk | Echo canceller ensuring further reduction in residual echo |
US7203308B2 (en) | 2001-11-20 | 2007-04-10 | Ricoh Company, Ltd. | Echo canceller ensuring further reduction in residual echo |
EP2988301A3 (en) * | 2014-07-31 | 2016-06-01 | Fujitsu Limited | Echo suppression device and echo suppression method |
US9653091B2 (en) | 2014-07-31 | 2017-05-16 | Fujitsu Limited | Echo suppression device and echo suppression method |
Also Published As
Publication number | Publication date |
---|---|
AU1155297A (en) | 1997-07-14 |
EP0868787A1 (en) | 1998-10-07 |
KR20000064382A (en) | 2000-11-06 |
SE9504520L (en) | 1997-06-19 |
KR100308226B1 (en) | 2001-11-02 |
US6195430B1 (en) | 2001-02-27 |
SE505692C2 (en) | 1997-09-29 |
AU723722B2 (en) | 2000-09-07 |
BR9612049A (en) | 1999-07-13 |
EP0868787B1 (en) | 2004-09-22 |
SE9504520D0 (en) | 1995-12-18 |
JP2000502229A (en) | 2000-02-22 |
CA2240726A1 (en) | 1997-06-26 |
DE69633458D1 (en) | 2004-10-28 |
DE69633458T2 (en) | 2005-10-13 |
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