ZA95599B - Doubletalk detection by means of spectral content - Google Patents

Doubletalk detection by means of spectral content

Info

Publication number
ZA95599B
ZA95599B ZA95599A ZA95599A ZA95599B ZA 95599 B ZA95599 B ZA 95599B ZA 95599 A ZA95599 A ZA 95599A ZA 95599 A ZA95599 A ZA 95599A ZA 95599 B ZA95599 B ZA 95599B
Authority
ZA
South Africa
Prior art keywords
spectral content
doubletalk detection
doubletalk
detection
spectral
Prior art date
Application number
ZA95599A
Other languages
English (en)
Inventor
Gilbert C Sih
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 ZA95599B publication Critical patent/ZA95599B/xx

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)
  • Filters That Use Time-Delay Elements (AREA)
ZA95599A 1994-02-28 1995-01-25 Doubletalk detection by means of spectral content ZA95599B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US20252194A 1994-02-28 1994-02-28

Publications (1)

Publication Number Publication Date
ZA95599B true ZA95599B (en) 1996-02-06

Family

ID=22750235

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA95599A ZA95599B (en) 1994-02-28 1995-01-25 Doubletalk detection by means of spectral content

Country Status (6)

Country Link
US (1) US5732134A (zh)
AU (1) AU1934295A (zh)
IL (1) IL112797A (zh)
TW (1) TW271028B (zh)
WO (1) WO1995023477A1 (zh)
ZA (1) ZA95599B (zh)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6044068A (en) * 1996-10-01 2000-03-28 Telefonaktiebolaget Lm Ericsson Silence-improved echo canceller
US6192087B1 (en) 1996-11-15 2001-02-20 Conexant Systems, Inc. Method and apparatus for spectral shaping in signal-point limited transmission systems
US6278744B1 (en) 1996-11-15 2001-08-21 Conexant Systems, Inc. System for controlling and shaping the spectrum and redundancy of signal-point limited transmission
EP0847180A1 (en) * 1996-11-27 1998-06-10 Nokia Mobile Phones Ltd. Double talk detector
US5943645A (en) * 1996-12-19 1999-08-24 Northern Telecom Limited Method and apparatus for computing measures of echo
US6185195B1 (en) * 1997-05-16 2001-02-06 Qualcomm Incorporated Methods for preventing and detecting message collisions in a half-duplex communication system
DE19743192C2 (de) * 1997-09-30 1999-09-09 Siemens Ag Echokompensationsverfahren, Echokompensationsvorrichtung und Telekommunikationsgerät
US6236645B1 (en) * 1998-03-09 2001-05-22 Broadcom Corporation Apparatus for, and method of, reducing noise in a communications system
US6434110B1 (en) * 1998-03-20 2002-08-13 Cirrus Logic, Inc. Full-duplex speakerphone circuit including a double-talk detector
US6282176B1 (en) * 1998-03-20 2001-08-28 Cirrus Logic, Inc. Full-duplex speakerphone circuit including a supplementary echo suppressor
US6658107B1 (en) 1998-10-23 2003-12-02 Telefonaktiebolaget Lm Ericsson (Publ) Methods and apparatus for providing echo suppression using frequency domain nonlinear processing
US6269161B1 (en) 1999-05-20 2001-07-31 Signalworks, Inc. System and method for near-end talker detection by spectrum analysis
GB2352948B (en) * 1999-07-13 2004-03-31 Racal Recorders Ltd Voice activity monitoring apparatus and methods
US20020181698A1 (en) * 2000-01-19 2002-12-05 Shinya Takahashi Sound communication device and echo processor
US7747002B1 (en) 2000-03-15 2010-06-29 Broadcom Corporation Method and system for stereo echo cancellation for VoIP communication systems
US6859531B1 (en) * 2000-09-15 2005-02-22 Intel Corporation Residual echo estimation for echo cancellation
JP4110734B2 (ja) * 2000-11-27 2008-07-02 沖電気工業株式会社 音声パケット通信の品質制御装置
US6792107B2 (en) 2001-01-26 2004-09-14 Lucent Technologies Inc. Double-talk detector suitable for a telephone-enabled PC
DE10230101A1 (de) * 2002-07-04 2004-01-29 Siemens Ag Verfahren zur Leitungsanpassung
JP4161628B2 (ja) * 2002-07-19 2008-10-08 日本電気株式会社 エコー抑圧方法及び装置
NO318401B1 (no) * 2003-03-10 2005-03-14 Tandberg Telecom As Et audio-ekkokanselleringssystem og en fremgangsmate for a tilveiebringe et ekkodempet utgangssignal fra et ekkotillagt signal
US8457614B2 (en) * 2005-04-07 2013-06-04 Clearone Communications, Inc. Wireless multi-unit conference phone
US20070033030A1 (en) * 2005-07-19 2007-02-08 Oded Gottesman Techniques for measurement, adaptation, and setup of an audio communication system
WO2007062634A1 (de) * 2005-11-30 2007-06-07 Voice Inter Connect Gmbh Verfahren zur steuerung des adaptionsverhaltens einer akustischen echokompensation
JP4955696B2 (ja) * 2005-12-05 2012-06-20 テレフオンアクチーボラゲット エル エム エリクソン（パブル） エコー検出
US8920343B2 (en) 2006-03-23 2014-12-30 Michael Edward Sabatino Apparatus for acquiring and processing of physiological auditory signals
US8369511B2 (en) * 2006-12-26 2013-02-05 Huawei Technologies Co., Ltd. Robust method of echo suppressor
EP2153439B1 (en) * 2007-02-21 2018-01-17 Telefonaktiebolaget LM Ericsson (publ) Double talk detector
US8050398B1 (en) * 2007-10-31 2011-11-01 Clearone Communications, Inc. Adaptive conferencing pod sidetone compensator connecting to a telephonic device having intermittent sidetone
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
US8498407B2 (en) * 2008-12-02 2013-07-30 Qualcomm Incorporated Systems and methods for double-talk detection in acoustically harsh environments
EP2348645B1 (en) * 2009-01-20 2018-04-11 Huawei Technologies Co., Ltd. Method and apparatus for detecting double talk
JP2011100029A (ja) * 2009-11-06 2011-05-19 Nec Corp 信号処理方法、情報処理装置、及び信号処理プログラム
GB2547063B (en) * 2014-10-30 2018-01-31 Imagination Tech Ltd Noise estimator
US10328852B2 (en) 2015-05-12 2019-06-25 University Of North Dakota Systems and methods to provide feedback to pilot/operator by utilizing integration of navigation and physiological monitoring
CN105681513A (zh) * 2016-02-29 2016-06-15 上海游密信息科技有限公司 通话语音信号发送方法、系统及通话终端
CN109256145B (zh) * 2017-07-14 2021-11-02 北京搜狗科技发展有限公司 基于终端的音频处理方法、装置、终端和可读存储介质

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4712235A (en) * 1984-11-19 1987-12-08 International Business Machines Corporation Method and apparatus for improved control and time sharing of an echo canceller
NL8701633A (nl) * 1987-07-10 1989-02-01 Philips Nv Digitale echocompensator.
US5014263A (en) * 1987-10-02 1991-05-07 Advanced Micro Devices, Inc. Adaptive echo-canceller with double-talker detection
FR2651077B1 (fr) * 1989-08-18 1994-06-10 Letourneur Gregoire Dispositif de traitement d'echo notamment acoustique dans une ligne telephonique
JP2518433B2 (ja) * 1990-01-24 1996-07-24 日本電気株式会社 ダブルト―ク検出回路
NL9001016A (nl) * 1990-04-27 1991-11-18 Philips Nv Digitale echocompensator met een dubbelspraakdetector.
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
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

Also Published As

Publication number Publication date
IL112797A (en) 1998-10-30
WO1995023477A1 (en) 1995-08-31
AU1934295A (en) 1995-09-11
TW271028B (zh) 1996-02-21
US5732134A (en) 1998-03-24
IL112797A0 (en) 1995-05-26

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