IL98963A - Residual echo removal with relative noise injection - Google Patents

Residual echo removal with relative noise injection

Info

Publication number
IL98963A
IL98963A IL9896391A IL9896391A IL98963A IL 98963 A IL98963 A IL 98963A IL 9896391 A IL9896391 A IL 9896391A IL 9896391 A IL9896391 A IL 9896391A IL 98963 A IL98963 A IL 98963A
Authority
IL
Israel
Prior art keywords
send
signal
noise
average
echo
Prior art date
Application number
IL9896391A
Other languages
English (en)
Hebrew (he)
Other versions
IL98963A0 (en
Original Assignee
Coherent Communicat Syst
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 Coherent Communicat Syst filed Critical Coherent Communicat Syst
Publication of IL98963A0 publication Critical patent/IL98963A0/xx
Priority to IL11110694A priority Critical patent/IL111106A0/xx
Publication of IL98963A publication Critical patent/IL98963A/en

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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Primary Cells (AREA)
  • Filters And Equalizers (AREA)
  • Led Device Packages (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
IL9896391A 1990-08-03 1991-07-25 Residual echo removal with relative noise injection IL98963A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
IL11110694A IL111106A0 (en) 1990-08-03 1994-09-29 Residual echo elimination with proportionate noise injection

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US07/562,713 US5157653A (en) 1990-08-03 1990-08-03 Residual echo elimination with proportionate noise injection

Publications (2)

Publication Number Publication Date
IL98963A0 IL98963A0 (en) 1992-07-15
IL98963A true IL98963A (en) 1995-01-24

Family

ID=24247460

Family Applications (3)

Application Number Title Priority Date Filing Date
IL9896391A IL98963A (en) 1990-08-03 1991-07-25 Residual echo removal with relative noise injection
IL11110691A IL111106A (en) 1990-08-03 1991-07-25 Residual echo removal with relative noise injection
IL11110694A IL111106A0 (en) 1990-08-03 1994-09-29 Residual echo elimination with proportionate noise injection

Family Applications After (2)

Application Number Title Priority Date Filing Date
IL11110691A IL111106A (en) 1990-08-03 1991-07-25 Residual echo removal with relative noise injection
IL11110694A IL111106A0 (en) 1990-08-03 1994-09-29 Residual echo elimination with proportionate noise injection

Country Status (13)

Country Link
US (2) US5157653A (de)
EP (1) EP0542882B1 (de)
CN (1) CN1059628A (de)
AT (1) ATE166755T1 (de)
AU (1) AU650477B2 (de)
CA (2) CA2139895C (de)
DE (1) DE69129497T2 (de)
DK (1) DK0542882T3 (de)
ES (1) ES2117644T3 (de)
HU (1) HUT63279A (de)
IL (3) IL98963A (de)
MX (1) MX9100478A (de)
WO (1) WO1992002994A1 (de)

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US5477535A (en) * 1991-11-04 1995-12-19 Nokia Telecommunications Oy Method of preventing a divergence of an adaptive echo canceller in a noisy signal environment
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US5487109A (en) * 1994-05-17 1996-01-23 Bellsouth Corporation End office of a telephone system with a zero loss plan
KR960015851B1 (ko) * 1994-07-12 1996-11-22 재단법인 한국전자통신연구소 반향 제거회로의 제어 방법(Controlling Method of Echo Canceller Circuit)
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US5745564A (en) * 1995-01-26 1998-04-28 Northern Telecom Limited Echo cancelling arrangement
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US5587998A (en) * 1995-03-03 1996-12-24 At&T Method and apparatus for reducing residual far-end echo in voice communication networks
US5710981A (en) * 1995-05-23 1998-01-20 Ericsson Inc. Portable radio power control device and method using incrementally degraded received signals
US5561668A (en) * 1995-07-06 1996-10-01 Coherent Communications Systems Corp. Echo canceler with subband attenuation and noise injection control
US5949888A (en) * 1995-09-15 1999-09-07 Hughes Electronics Corporaton Comfort noise generator for echo cancelers
US5668794A (en) * 1995-09-29 1997-09-16 Crystal Semiconductor Variable gain echo suppressor
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US5937060A (en) * 1996-02-09 1999-08-10 Texas Instruments Incorporated Residual echo suppression
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US5856970A (en) * 1996-08-05 1999-01-05 Motorola, Inc. Multi-channel echo cancellation method and apparatus
US5875246A (en) * 1996-10-29 1999-02-23 Xinex Networks Inc. Distributed audio signal processing in a network experiencing transmission delay
US5890111A (en) * 1996-12-24 1999-03-30 Technology Research Association Of Medical Welfare Apparatus Enhancement of esophageal speech by injection noise rejection
US6301357B1 (en) * 1996-12-31 2001-10-09 Ericsson Inc. AC-center clipper for noise and echo suppression in a communications system
US6160886A (en) * 1996-12-31 2000-12-12 Ericsson Inc. Methods and apparatus for improved echo suppression in communications systems
US6064873A (en) * 1997-03-26 2000-05-16 Telefonaktiebolaget L M Ericsson (Publ) Method and apparatus for controlling echo on both sides of a connection
US6167133A (en) * 1997-04-02 2000-12-26 At&T Corporation Echo detection, tracking, cancellation and noise fill in real time in a communication system
US5946649A (en) * 1997-04-16 1999-08-31 Technology Research Association Of Medical Welfare Apparatus Esophageal speech injection noise detection and rejection
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GB2330745B (en) 1997-10-24 2002-08-21 Mitel Corp Nonlinear processor for acoustic echo canceller
US6198819B1 (en) * 1997-11-14 2001-03-06 Tellabs Operations, Inc. Echo canceller having improved non-linear processor
US6031908A (en) * 1997-11-14 2000-02-29 Tellabs Operations, Inc. Echo canceller employing dual-H architecture having variable 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
US6148078A (en) * 1998-01-09 2000-11-14 Ericsson Inc. Methods and apparatus for controlling echo suppression in communications systems
US6163608A (en) * 1998-01-09 2000-12-19 Ericsson Inc. Methods and apparatus for providing comfort noise in communications systems
US6658107B1 (en) 1998-10-23 2003-12-02 Telefonaktiebolaget Lm Ericsson (Publ) Methods and apparatus for providing echo suppression using frequency domain nonlinear processing
JP2000252881A (ja) * 1999-02-25 2000-09-14 Mitsubishi Electric Corp ダブルトーク検知装置並びにエコーキャンセラ装置およびエコーサプレッサー装置
JP2001016057A (ja) * 1999-07-01 2001-01-19 Matsushita Electric Ind Co Ltd 音響装置
DE19935808A1 (de) 1999-07-29 2001-02-08 Ericsson Telefon Ab L M Echounterdrückungseinrichtung zum Unterdrücken von Echos in einer Sender/Empfänger-Einheit
US6694019B1 (en) * 1999-08-26 2004-02-17 Nortel Networks Limited Method and apparatus for infinite return loss handler for network echo canceller
AU6862200A (en) * 1999-09-07 2001-04-10 Dspc Technologies Ltd. Suppression of residual acoustic echo
US7050575B1 (en) 2000-06-16 2006-05-23 Ericsson Inc. Echo canceler coefficient update apparatus and method
US6622030B1 (en) * 2000-06-29 2003-09-16 Ericsson Inc. Echo suppression using adaptive gain based on residual echo energy
US6799062B1 (en) * 2000-10-19 2004-09-28 Motorola Inc. Full-duplex hands-free transparency circuit and method therefor
DE10119277A1 (de) * 2001-04-20 2002-10-24 Alcatel Sa Verfahren zur Maskierung von Geräuschmodulationen und Störgeräuschen bei der Sprachübertragung
US7154867B1 (en) * 2001-12-06 2006-12-26 At&T Corporation Echo reduction
AU2003233019A1 (en) * 2002-06-19 2004-01-06 Koninklijke Philips Electronics N.V. Non stationary echo canceller
US7016488B2 (en) * 2002-06-24 2006-03-21 Freescale Semiconductor, Inc. Method and apparatus for non-linear processing of an audio signal
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
US7251213B2 (en) * 2002-09-17 2007-07-31 At&T Corp. Method for remote measurement of echo path delay
US7365577B2 (en) * 2002-11-15 2008-04-29 Telebyte, Inc. Noise waveform generator with spectrum control
US7003099B1 (en) * 2002-11-15 2006-02-21 Fortmedia, Inc. Small array microphone for acoustic echo cancellation and noise suppression
US7065207B2 (en) * 2003-09-11 2006-06-20 Freescale Semiconductor, Inc. Controlling attenuation during echo suppression
US8457614B2 (en) * 2005-04-07 2013-06-04 Clearone Communications, Inc. Wireless multi-unit conference phone
US7711107B1 (en) * 2005-05-12 2010-05-04 Mindspeed Technologies, Inc. Perceptual masking of residual echo
US8238817B1 (en) 2006-04-12 2012-08-07 Emc Satcom Technologies, Llc Noise reduction system and method thereof
US7729657B1 (en) 2006-04-12 2010-06-01 Abel Avellan Noise reduction system and method thereof
US8396206B2 (en) * 2007-02-15 2013-03-12 Infineon Technologies Ag Multi-channel communication device and methods for reducing echoes by inserting a training sequence under a spectral mask
US8213597B2 (en) * 2007-02-15 2012-07-03 Infineon Technologies Ag Audio communication device and methods for reducing echoes by inserting a training sequence under a spectral mask
US7809129B2 (en) * 2007-08-31 2010-10-05 Motorola, Inc. Acoustic echo cancellation based on noise environment
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
US8290141B2 (en) * 2008-04-18 2012-10-16 Freescale Semiconductor, Inc. Techniques for comfort noise generation in a communication system
US7522877B1 (en) 2008-08-01 2009-04-21 Emc Satcom Technologies, Inc. Noise reduction system and method thereof
US9065895B2 (en) * 2012-02-22 2015-06-23 Broadcom Corporation Non-linear echo cancellation
US8861713B2 (en) * 2013-03-17 2014-10-14 Texas Instruments Incorporated Clipping based on cepstral distance for acoustic echo canceller
GB201309779D0 (en) 2013-05-31 2013-07-17 Microsoft Corp Echo removal
GB201309777D0 (en) 2013-05-31 2013-07-17 Microsoft Corp Echo suppression
GB201309771D0 (en) 2013-05-31 2013-07-17 Microsoft Corp Echo removal
GB201309773D0 (en) 2013-05-31 2013-07-17 Microsoft Corp Echo removal

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US3894200A (en) * 1973-10-10 1975-07-08 Communications Satellite Corp Adaptive echo canceller with digital center clipping
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GB2245459A (en) * 1990-06-20 1992-01-02 Motorola Inc Echo canceller with adaptive voice switch attenuation

Also Published As

Publication number Publication date
MX9100478A (es) 1992-08-10
WO1992002994A1 (en) 1992-02-20
EP0542882A4 (en) 1993-08-11
IL111106A (en) 1995-10-31
ES2117644T3 (es) 1998-08-16
DK0542882T3 (da) 1999-03-22
CA2088684C (en) 1995-04-11
CA2088684A1 (en) 1992-02-04
IL111106A0 (en) 1994-11-28
US5157653A (en) 1992-10-20
EP0542882A1 (de) 1993-05-26
CA2139895C (en) 1999-07-13
HU9300262D0 (en) 1993-06-28
ATE166755T1 (de) 1998-06-15
DE69129497T2 (de) 1998-11-05
IL98963A0 (en) 1992-07-15
CA2139895A1 (en) 1992-02-04
US5283784A (en) 1994-02-01
DE69129497D1 (en) 1998-07-02
AU8435291A (en) 1992-03-02
HUT63279A (en) 1993-07-28
CN1059628A (zh) 1992-03-18
EP0542882B1 (de) 1998-05-27
AU650477B2 (en) 1994-06-23

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Legal Events

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