DE69730351T2 - Disable-tondetektor für einen netzwerkechokompensator - Google Patents

Disable-tondetektor für einen netzwerkechokompensator Download PDF

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Publication number
DE69730351T2
DE69730351T2 DE69730351T DE69730351T DE69730351T2 DE 69730351 T2 DE69730351 T2 DE 69730351T2 DE 69730351 T DE69730351 T DE 69730351T DE 69730351 T DE69730351 T DE 69730351T DE 69730351 T2 DE69730351 T2 DE 69730351T2
Authority
DE
Germany
Prior art keywords
phase
tone
derivative
sound
quadrature components
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 - Lifetime
Application number
DE69730351T
Other languages
German (de)
English (en)
Other versions
DE69730351D1 (de
Inventor
Tonu Trump
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.)
Telefonaktiebolaget LM Ericsson AB
Original Assignee
Telefonaktiebolaget LM Ericsson AB
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 Telefonaktiebolaget LM Ericsson AB filed Critical Telefonaktiebolaget LM Ericsson AB
Publication of DE69730351D1 publication Critical patent/DE69730351D1/de
Application granted granted Critical
Publication of DE69730351T2 publication Critical patent/DE69730351T2/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying
    • H04L27/22—Demodulator circuits; Receiver circuits
    • H04L27/233—Demodulator circuits; Receiver circuits using non-coherent demodulation
    • H04L27/2332—Demodulator circuits; Receiver circuits using non-coherent demodulation using a non-coherent carrier
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
DE69730351T 1996-01-31 1997-01-28 Disable-tondetektor für einen netzwerkechokompensator Expired - Lifetime DE69730351T2 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US594584 1990-10-09
US08/594,584 US5815568A (en) 1996-01-31 1996-01-31 Disabling tone detector for network echo canceller
PCT/SE1997/000130 WO1997028613A1 (en) 1996-01-31 1997-01-28 Disabling tone detector for network echo canceller

Publications (2)

Publication Number Publication Date
DE69730351D1 DE69730351D1 (de) 2004-09-23
DE69730351T2 true DE69730351T2 (de) 2005-06-23

Family

ID=24379510

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69730351T Expired - Lifetime DE69730351T2 (de) 1996-01-31 1997-01-28 Disable-tondetektor für einen netzwerkechokompensator

Country Status (8)

Country Link
US (1) US5815568A (cg-RX-API-DMAC7.html)
EP (1) EP0953233B1 (cg-RX-API-DMAC7.html)
JP (1) JP3983809B2 (cg-RX-API-DMAC7.html)
CN (1) CN1214818A (cg-RX-API-DMAC7.html)
AU (1) AU1679497A (cg-RX-API-DMAC7.html)
DE (1) DE69730351T2 (cg-RX-API-DMAC7.html)
TR (1) TR199801459T2 (cg-RX-API-DMAC7.html)
WO (1) WO1997028613A1 (cg-RX-API-DMAC7.html)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2161042C (en) * 1995-10-20 2001-08-28 John Miller Digital phase reversal detector
US6185280B1 (en) * 1998-02-12 2001-02-06 Intervoice Limited Partnership Line impedance matching using dynamically generated transfer functions
US7424109B1 (en) * 1999-03-25 2008-09-09 Intel Corporation Rapid training echo cancellor for telecommunications system
US6868116B2 (en) * 2001-02-16 2005-03-15 Nortel Networks Limited Universal telephony tones detector
KR100477638B1 (ko) * 2001-09-11 2005-03-23 삼성전자주식회사 ２ｄ／３ｄ 겸용 디스플레이
US7035394B2 (en) * 2001-12-17 2006-04-25 Ricoh Company, Ltd. Tone detector judging a detection of a predetermined tone signal by comparing a characteristic quantity of the tone signal with characteristic quantities of other signals
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
ATE352953T1 (de) 2002-08-28 2007-02-15 Freescale Semiconductor Inc Verfahren und vorrichtung zur detektierung von tonsignalen
US6970559B2 (en) * 2002-09-30 2005-11-29 Rockwell Electronic Commerce Technologies, Llc Method and apparatus for detecting echo cancellers
GB2440589A (en) * 2005-06-01 2008-02-06 Tecteon Plc Phase difference calculator
WO2006130970A1 (en) 2005-06-10 2006-12-14 Sangoma Technologies Corporation Echo canceller controller
JP2007104721A (ja) * 2006-12-18 2007-04-19 Oki Electric Ind Co Ltd 位相反転検出装置
CN103281472B (zh) * 2013-05-27 2015-04-22 大连理工大学 一种传真ANSam信号的检测装置及其检测方法
CN107799123B (zh) * 2017-12-14 2021-07-23 南京地平线机器人技术有限公司 控制回声消除器的方法和具有回声消除功能的装置
CN114171043B (zh) 2021-12-06 2022-09-13 北京百度网讯科技有限公司 回声的确定方法、装置、设备以及存储介质

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3069501A (en) * 1958-08-20 1962-12-18 Bell Telephone Labor Inc Transmission control in two-way signaling systems
US3647993A (en) * 1970-05-18 1972-03-07 Wescom Tone disabler
NL8000883A (nl) * 1980-02-13 1981-09-16 Philips Nv Coherente ontvanger voor hoekgemoduleerde data signalen.
US4352962A (en) * 1980-06-27 1982-10-05 Reliance Electric Company Tone responsive disabling circuit
JPS60121856A (ja) * 1983-12-06 1985-06-29 Nec Corp 単一周波数信号検出回路
EP0239293A3 (en) * 1986-03-24 1988-12-14 Gpt Limited Data transmission systems
FR2597690B1 (fr) * 1986-04-22 1988-06-10 Trt Telecom Radio Electr Appareil de detection et de discrimination de sauts de phase dans un signal periodique et application a un signal telephonique de tonalite avec inversions de phase.
US4979211A (en) * 1988-11-16 1990-12-18 At&T Bell Laboratories Classifier for high speed voiceband digital data modem signals
US5123009A (en) * 1990-10-26 1992-06-16 Racal Data Communications Inc. Method and apparatus for disabling an echo canceller
FI89659C (fi) * 1991-11-04 1993-10-25 Nokia Telecommunications Oy Foerfarande foer identifiering av en spaerrsignal hos en ekoslaeckare
IT1271931B (it) * 1993-02-09 1997-06-10 Italtel Spa Procedimento e dispositivo per il riconoscimento del tono di disabilitazione del cancellatore d'eco in una centrale telefonica di commutazione

Also Published As

Publication number Publication date
EP0953233A1 (en) 1999-11-03
JP3983809B2 (ja) 2007-09-26
DE69730351D1 (de) 2004-09-23
EP0953233B1 (en) 2004-08-18
US5815568A (en) 1998-09-29
AU1679497A (en) 1997-08-22
WO1997028613A1 (en) 1997-08-07
CN1214818A (zh) 1999-04-21
TR199801459T2 (en) 1998-10-21
JP2000504172A (ja) 2000-04-04

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