DE69122631D1 - Anordnung und Verfahren zur schnellen Detektion von gleichzeitigem Sprechen in einem Fernsprechkommunikationssystem mit langen Entfernungen - Google Patents

Anordnung und Verfahren zur schnellen Detektion von gleichzeitigem Sprechen in einem Fernsprechkommunikationssystem mit langen Entfernungen

Info

Publication number
DE69122631D1
DE69122631D1 DE69122631T DE69122631T DE69122631D1 DE 69122631 D1 DE69122631 D1 DE 69122631D1 DE 69122631 T DE69122631 T DE 69122631T DE 69122631 T DE69122631 T DE 69122631T DE 69122631 D1 DE69122631 D1 DE 69122631D1
Authority
DE
Germany
Prior art keywords
arrangement
communication system
long distance
telephone communication
speech detection
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.)
Expired - Fee Related
Application number
DE69122631T
Other languages
English (en)
Other versions
DE69122631T2 (de
Inventor
Hideo Sano
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.)
NEC Corp
Original Assignee
NEC Corp
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 NEC Corp filed Critical NEC Corp
Publication of DE69122631D1 publication Critical patent/DE69122631D1/de
Application granted granted Critical
Publication of DE69122631T2 publication Critical patent/DE69122631T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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
    • 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
    • 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
    • H04B3/231—Echo cancellers using readout of a memory to provide the echo replica

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
DE69122631T 1990-01-24 1991-01-23 Anordnung und Verfahren zur schnellen Detektion von gleichzeitigem Sprechen in einem Fernsprechkommunikationssystem mit langen Entfernungen Expired - Fee Related DE69122631T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2014250A JP2518433B2 (ja) 1990-01-24 1990-01-24 ダブルト―ク検出回路

Publications (2)

Publication Number Publication Date
DE69122631D1 true DE69122631D1 (de) 1996-11-21
DE69122631T2 DE69122631T2 (de) 1997-05-28

Family

ID=11855844

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69122631T Expired - Fee Related DE69122631T2 (de) 1990-01-24 1991-01-23 Anordnung und Verfahren zur schnellen Detektion von gleichzeitigem Sprechen in einem Fernsprechkommunikationssystem mit langen Entfernungen

Country Status (6)

Country Link
US (1) US5193112A (de)
EP (1) EP0439139B1 (de)
JP (1) JP2518433B2 (de)
AU (1) AU641208B2 (de)
CA (1) CA2034802C (de)
DE (1) DE69122631T2 (de)

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JP2654599B2 (ja) * 1991-02-27 1997-09-17 日本電気株式会社 ダブルトーク検出回路
FI89756C (fi) * 1991-11-04 1993-11-10 Nokia Telecommunications Oy Foerfarande foer olineaer signalbehandling i en ekoslaeckare
JP2853455B2 (ja) * 1992-05-15 1999-02-03 ケイディディ株式会社 エコーキャンセラ
WO1994000944A1 (en) * 1992-06-30 1994-01-06 Polycom, Inc. Method and apparatus for ringer detection
JPH06338829A (ja) * 1993-05-28 1994-12-06 American Teleph & Telegr Co <Att> 通信システム内の反響除去方法と装置
US5390244A (en) * 1993-09-10 1995-02-14 Polycom, Inc. Method and apparatus for periodic signal detection
FR2710211A1 (fr) * 1993-09-13 1995-03-24 Trt Telecom Radio Electr Dispositif de détection de rupture de ligne et modem comportant un tel dispositif.
US5475731A (en) * 1994-01-07 1995-12-12 Ericsson Inc. Echo-canceling system and method using echo estimate to modify error signal
ZA95599B (en) * 1994-02-28 1996-02-06 Qualcomm Inc Doubletalk detection by means of spectral content
US5577097A (en) * 1994-04-14 1996-11-19 Northern Telecom Limited Determining echo return loss in echo cancelling arrangements
EP1578025A1 (de) * 1994-05-06 2005-09-21 NTT Mobile Communications Network Inc. Verfahren und Gerät zur Detektion von Doppelsprechen sowie Echokompensator
US5535194A (en) * 1994-07-14 1996-07-09 Motorola, Inc. Method and apparatus for echo canceling with double-talk immunity
US5495473A (en) * 1994-12-28 1996-02-27 Intel Corporation Method and apparatus for implementing hardware independent echo cancellation in a full-duplex audio stream in a computer system
US5852661A (en) * 1995-02-17 1998-12-22 Advanced Micro Devices, Inc. Adaptive echo cancellation used with echo suppression to reduce short and long duration echoes
US5600718A (en) * 1995-02-24 1997-02-04 Ericsson Inc. Apparatus and method for adaptively precompensating for loudspeaker distortions
US5680450A (en) * 1995-02-24 1997-10-21 Ericsson Inc. Apparatus and method for canceling acoustic echoes including non-linear distortions in loudspeaker telephones
US5646990A (en) * 1995-09-21 1997-07-08 Rockwell International Corporation Efficient speakerphone anti-howling system
US5675644A (en) * 1995-09-26 1997-10-07 Qualcomm Incorporated Method and apparatus for canceling echo accounting for delay variations
US5764753A (en) * 1995-09-29 1998-06-09 Crystal Semiconductor Corp. Half-duplex controller
US5631900A (en) * 1995-09-29 1997-05-20 Crystal Semiconductor Double-Talk detector for echo canceller
US5978473A (en) * 1995-12-27 1999-11-02 Ericsson Inc. Gauging convergence of adaptive filters
US5796819A (en) * 1996-07-24 1998-08-18 Ericsson Inc. Echo canceller for non-linear circuits
WO1998006185A1 (en) * 1996-08-01 1998-02-12 Northern Telecom Limited Echo cancelling system for digital telephony applications
DE19639702C2 (de) * 1996-09-26 2000-11-16 Siemens Ag Verfahren und Anordnung zur Begrenzung des Restechos
DE19639703C2 (de) * 1996-09-26 1999-05-20 Siemens Ag Verfahren und Anordnung zur Echokompensation
EP0847180A1 (de) 1996-11-27 1998-06-10 Nokia Mobile Phones Ltd. Eine Doppelsprechdetektion
US5953411A (en) * 1996-12-18 1999-09-14 Intel Corporation Method and apparatus for maintaining audio sample correlation
US6035034A (en) * 1996-12-20 2000-03-07 Telefonaktiebolaget L M Ericsson (Publ) Double talk and echo path change detection in a telephony system
US5943392A (en) * 1997-01-24 1999-08-24 Southwestern Bell Telephone Company Device for measuring echo return loss in a two-two wire line system
US6055311A (en) * 1997-01-31 2000-04-25 Telefonaktiebolaget L M Ericsson (Publ) Dynamic echo canceller and parameter selection in telephony systems
US5933797A (en) * 1997-02-28 1999-08-03 Telefonaktiebolaget Lm Ericsson (Publ) Adaptive dual filter echo cancellation
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
GB2330746B (en) 1997-10-24 2002-07-17 Mitel Corp Double-talk insensitive NLMS algorithm
US6011952A (en) * 1998-01-20 2000-01-04 Viasat, Inc. Self-interference cancellation for relayed communication networks
KR100279825B1 (ko) * 1998-12-23 2001-02-01 윤종용 교환기에서 에코 및 측음 현상을 제거하는 회로
US6570986B1 (en) 1999-08-30 2003-05-27 Industrial Technology Research Institute Double-talk detector
US7164659B2 (en) * 1999-12-09 2007-01-16 Broadcom Corporation Adaptive gain control based on echo canceller performance information
GB2371191B (en) * 2001-01-11 2005-06-15 Mitel Corp Double-talk and path change detection using a matrix of correlation coefficients
US6859641B2 (en) * 2001-06-21 2005-02-22 Applied Signal Technology, Inc. Adaptive canceller for frequency reuse systems
US6907093B2 (en) 2001-08-08 2005-06-14 Viasat, Inc. Method and apparatus for relayed communication using band-pass signals for self-interference cancellation
US6725017B2 (en) 2001-12-05 2004-04-20 Viasat, Inc. Multi-channel self-interference cancellation method and apparatus for relayed communication
KR101035736B1 (ko) * 2003-12-12 2011-05-20 삼성전자주식회사 이동통신 시스템의 단말 장치에서 반향 제거 장치 및 방법
US20050213748A1 (en) * 2004-02-11 2005-09-29 Rtx Telecom A/S Line extender for high speed modem data transfer
US8761385B2 (en) 2004-11-08 2014-06-24 Nec Corporation Signal processing method, signal processing device, and signal processing program
GB2439989A (en) * 2005-06-01 2008-01-16 Tecteon Plc Correlator for signal or noise classification
JP4678349B2 (ja) 2006-08-31 2011-04-27 ヤマハ株式会社 通話判定装置
JP4312227B2 (ja) 2006-11-21 2009-08-12 富士通株式会社 エコー処理方法及び装置
JP2008219088A (ja) * 2007-02-28 2008-09-18 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
US8019075B2 (en) * 2007-04-02 2011-09-13 Microsoft Corporation Hybrid echo canceller controllers
US8014519B2 (en) * 2007-04-02 2011-09-06 Microsoft Corporation Cross-correlation based echo canceller controllers
US8275139B2 (en) * 2008-03-26 2012-09-25 Ittiam Systems (P) Ltd. Linear full duplex system and method for acoustic echo cancellation

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Publication number Priority date Publication date Assignee Title
AU537603B2 (en) * 1980-11-24 1984-07-05 Communications Satellite Corporation Echo canceller with improved double talk detection
US4587382A (en) * 1982-07-29 1986-05-06 Gte Lenkurt Incorporated Echo canceller using end delay measurement
JPS5980030A (ja) * 1982-10-30 1984-05-09 Fujitsu Ltd エコ−キヤンセラ−の制御方法
US4621172A (en) * 1982-12-22 1986-11-04 Nec Corporation Fast convergence method and system for echo canceller
JPS59151546A (ja) * 1983-02-18 1984-08-30 Nec Corp 適応形反響消去装置
US4894820A (en) * 1987-03-24 1990-01-16 Oki Electric Industry Co., Ltd. Double-talk detection in an echo canceller
JPH0748679B2 (ja) * 1987-03-24 1995-05-24 株式会社日立製作所 エコ−キヤンセラ
JPS6427325A (en) * 1987-07-23 1989-01-30 Fujitsu Ltd Echo canceller
US4918727A (en) * 1988-06-09 1990-04-17 Tellabs Incorporated Double talk detector for echo canceller and method
AU614447B2 (en) * 1988-12-01 1991-08-29 Nec Corporation Echo canceller with means for determining filter coefficients from autocorrelation and cross-correlation coefficients

Also Published As

Publication number Publication date
AU6995691A (en) 1991-07-25
EP0439139A3 (en) 1993-09-29
AU641208B2 (en) 1993-09-16
CA2034802C (en) 1995-01-03
EP0439139B1 (de) 1996-10-16
EP0439139A2 (de) 1991-07-31
JPH03218150A (ja) 1991-09-25
DE69122631T2 (de) 1997-05-28
US5193112A (en) 1993-03-09
JP2518433B2 (ja) 1996-07-24

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8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee