AU7968191A - Echo canceller with adaptive voice switch attenuation - Google Patents

Echo canceller with adaptive voice switch attenuation

Info

Publication number
AU7968191A
AU7968191A AU79681/91A AU7968191A AU7968191A AU 7968191 A AU7968191 A AU 7968191A AU 79681/91 A AU79681/91 A AU 79681/91A AU 7968191 A AU7968191 A AU 7968191A AU 7968191 A AU7968191 A AU 7968191A
Authority
AU
Australia
Prior art keywords
echo canceller
voice switch
adaptive voice
switch attenuation
attenuation
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.)
Abandoned
Application number
AU79681/91A
Inventor
Kim Tilgaard Petersen
Morten Thrane
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.)
Motorola Solutions Inc
Original Assignee
Motorola 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 Motorola Inc filed Critical Motorola Inc
Publication of AU7968191A publication Critical patent/AU7968191A/en
Abandoned legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M9/00—Arrangements for interconnection not involving centralised switching
    • H04M9/08—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic
    • H04M9/082—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic using 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)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
AU79681/91A 1990-06-20 1991-06-19 Echo canceller with adaptive voice switch attenuation Abandoned AU7968191A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9013751A GB2245459A (en) 1990-06-20 1990-06-20 Echo canceller with adaptive voice switch attenuation
GB9013751 1990-06-20

Publications (1)

Publication Number Publication Date
AU7968191A true AU7968191A (en) 1992-01-07

Family

ID=10677919

Family Applications (1)

Application Number Title Priority Date Filing Date
AU79681/91A Abandoned AU7968191A (en) 1990-06-20 1991-06-19 Echo canceller with adaptive voice switch attenuation

Country Status (4)

Country Link
AU (1) AU7968191A (en)
GB (1) GB2245459A (en)
IE (1) IE912102A1 (en)
WO (1) WO1991020149A1 (en)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5157653A (en) * 1990-08-03 1992-10-20 Coherent Communications Systems Corp. Residual echo elimination with proportionate noise injection
US5263019A (en) * 1991-01-04 1993-11-16 Picturetel Corporation Method and apparatus for estimating the level of acoustic feedback between a loudspeaker and microphone
FI89756C (en) * 1991-11-04 1993-11-10 Nokia Telecommunications Oy FOERFARANDE FOER OLINEAER SIGNALBEHANDLING I EN EKOSLAECKARE
ES2101633B1 (en) * 1994-05-31 1998-03-01 Alcatel Standard Electrica FIXED CELL PHONE TERMINAL FOR TWO-WIRE TELECOMMUNICATION SERVICES.
JPH0832494A (en) * 1994-07-13 1996-02-02 Mitsubishi Electric Corp Hand-free talking device
ES2101638B1 (en) * 1994-09-30 1998-03-01 Alcatel Standard Electrica FIXED CELL PHONE TERMINAL FOR TWO-WIRE TELECOMMUNICATION SERVICES.
US5835851A (en) * 1995-01-19 1998-11-10 Ericsson Inc. Method and apparatus for echo reduction in a hands-free cellular radio using added noise frames
JP2928130B2 (en) * 1995-04-19 1999-08-03 埼玉日本電気株式会社 Hands-free communication device
FR2748174B1 (en) * 1996-04-30 1998-06-26 Sagem HANDS-FREE TELEPHONE SET
DE19639580C2 (en) * 1996-09-26 1998-09-17 Deutsche Telekom Ag Device for reducing acoustic echoes
KR20000064767A (en) * 1997-01-23 2000-11-06 비센트 비.인그라시아 Apparatus and method for nonlinear processing of communication systems
JP3597671B2 (en) * 1997-05-16 2004-12-08 三菱電機株式会社 Handsfree phone
US6580793B1 (en) * 1999-08-31 2003-06-17 Lucent Technologies Inc. Method and apparatus for echo cancellation with self-deactivation
JP3576430B2 (en) * 1999-09-01 2004-10-13 沖電気工業株式会社 Automatic gain controller
US6507653B1 (en) * 2000-04-14 2003-01-14 Ericsson Inc. Desired voice detection in echo suppression
DE10030926A1 (en) * 2000-06-24 2002-01-03 Alcatel Sa Interference-dependent adaptive echo cancellation
US6622030B1 (en) * 2000-06-29 2003-09-16 Ericsson Inc. Echo suppression using adaptive gain based on residual echo energy
FR2816791A1 (en) * 2000-11-15 2002-05-17 Atlinks Telephone loudspeaker unit echo limiting system having signal intensity set during receiver output transmission following set level base noise/parasitics determined.
JP4282260B2 (en) * 2001-11-20 2009-06-17 株式会社リコー Echo canceller
US9973633B2 (en) 2014-11-17 2018-05-15 At&T Intellectual Property I, L.P. Pre-distortion system for cancellation of nonlinear distortion in mobile devices

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4346261A (en) * 1980-03-17 1982-08-24 United Networks, Inc. Speaker phones
JPS6041849A (en) * 1983-08-18 1985-03-05 Toshiba Corp Loudspeaker telephone set
FR2612029B1 (en) * 1987-03-03 1989-05-12 Connan Jean Louis DEVICE FOR REALIZING THE "HANDSFREE" FUNCTION IN A TELEPHONE SET, COMBINING THE GAIN SWITCHING AND ECHO CANCELLATION FUNCTIONS

Also Published As

Publication number Publication date
GB2245459A (en) 1992-01-02
IE912102A1 (en) 1992-01-01
GB9013751D0 (en) 1990-08-08
WO1991020149A1 (en) 1991-12-26

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