DE69433659D1 - Vorrichtung und Verfahren zur Echo-Dämpfung - Google Patents

Vorrichtung und Verfahren zur Echo-Dämpfung

Info

Publication number
DE69433659D1
DE69433659D1 DE69433659T DE69433659T DE69433659D1 DE 69433659 D1 DE69433659 D1 DE 69433659D1 DE 69433659 T DE69433659 T DE 69433659T DE 69433659 T DE69433659 T DE 69433659T DE 69433659 D1 DE69433659 D1 DE 69433659D1
Authority
DE
Germany
Prior art keywords
attenuation
telephone
background noise
determined
noise
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
DE69433659T
Other languages
English (en)
Other versions
DE69433659T2 (de
Inventor
Jari Hagqvist
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.)
Nokia Oyj
Original Assignee
Nokia Oyj
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 Nokia Oyj filed Critical Nokia Oyj
Publication of DE69433659D1 publication Critical patent/DE69433659D1/de
Application granted granted Critical
Publication of DE69433659T2 publication Critical patent/DE69433659T2/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Telephone Function (AREA)
  • Fats And Perfumes (AREA)
  • Auxiliary Devices For Music (AREA)
  • Electrophonic Musical Instruments (AREA)
  • Telephone Set Structure (AREA)
DE69433659T 1993-12-23 1994-12-23 Vorrichtung und Verfahren zur Echo-Dämpfung Expired - Lifetime DE69433659T2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI935840A FI108830B (fi) 1993-12-23 1993-12-23 Menetelmä ja laite kaiun vaimentamiseksi puhelinlaitteessa
FI935840 1993-12-23

Publications (2)

Publication Number Publication Date
DE69433659D1 true DE69433659D1 (de) 2004-05-06
DE69433659T2 DE69433659T2 (de) 2005-02-17

Family

ID=8539177

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69433659T Expired - Lifetime DE69433659T2 (de) 1993-12-23 1994-12-23 Vorrichtung und Verfahren zur Echo-Dämpfung

Country Status (6)

Country Link
US (1) US5715310A (de)
EP (1) EP0665671B1 (de)
JP (1) JPH07221821A (de)
AT (1) ATE263466T1 (de)
DE (1) DE69433659T2 (de)
FI (1) FI108830B (de)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07273840A (ja) * 1994-03-25 1995-10-20 Nec Corp 音声帯域制御機能を有する移動電話機
US5949886A (en) * 1995-10-26 1999-09-07 Nevins; Ralph J. Setting a microphone volume level
EP0847180A1 (de) 1996-11-27 1998-06-10 Nokia Mobile Phones Ltd. Eine Doppelsprechdetektion
FI104524B (fi) * 1997-04-18 2000-02-15 Nokia Mobile Phones Ltd Kaiunpoistojärjestelmä ja -menetelmä sekä matkaviestin
FI114422B (fi) 1997-09-04 2004-10-15 Nokia Corp Lähteen puheaktiviteetin tunnistus
FR2816791A1 (fr) * 2000-11-15 2002-05-17 Atlinks Procede pour limiter les echos dans un poste telephonique a haut parleur et poste telephonique utilisant ce procede
US20060104460A1 (en) * 2004-11-18 2006-05-18 Motorola, Inc. Adaptive time-based noise suppression
EP1926087A1 (de) * 2006-11-27 2008-05-28 Siemens Audiologische Technik GmbH Anpassung einer Hörvorrichtung an ein Sprachsignal

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3889059A (en) * 1973-03-26 1975-06-10 Northern Electric Co Loudspeaking communication terminal apparatus and method of operation
GB2137458B (en) * 1983-03-01 1986-11-19 Standard Telephones Cables Ltd Digital handsfree telephone
US4630304A (en) * 1985-07-01 1986-12-16 Motorola, Inc. Automatic background noise estimator for a noise suppression system
CA1291837C (en) * 1987-07-15 1991-11-05 Juro Ohga Electronic telephone terminal having noise suppression function
CA2001277C (en) * 1989-10-24 1994-07-12 Bruce Leigh Townsend Hands free telecommunications apparatus and method
US5058153A (en) * 1989-12-27 1991-10-15 Carew Edward C Noise mitigation and mode switching in communications terminals such as telephones
JPH04323938A (ja) * 1991-04-23 1992-11-13 Toshiba Corp ハンズフリー回路
CA2052351C (en) * 1991-09-27 2000-05-23 Gordon J. Reesor Telephone handsfree algorithm
US5357567A (en) * 1992-08-14 1994-10-18 Motorola, Inc. Method and apparatus for volume switched gain control
US5381473A (en) * 1992-10-29 1995-01-10 Andrea Electronics Corporation Noise cancellation apparatus
US5548638A (en) * 1992-12-21 1996-08-20 Iwatsu Electric Co., Ltd. Audio teleconferencing apparatus
US5485522A (en) * 1993-09-29 1996-01-16 Ericsson Ge Mobile Communications, Inc. System for adaptively reducing noise in speech signals
US5485515A (en) * 1993-12-29 1996-01-16 At&T Corp. Background noise compensation in a telephone network

Also Published As

Publication number Publication date
EP0665671B1 (de) 2004-03-31
FI935840A0 (fi) 1993-12-23
EP0665671A2 (de) 1995-08-02
EP0665671A3 (de) 1999-04-28
ATE263466T1 (de) 2004-04-15
FI108830B (fi) 2002-03-28
DE69433659T2 (de) 2005-02-17
US5715310A (en) 1998-02-03
FI935840A (fi) 1995-06-24
JPH07221821A (ja) 1995-08-18

Similar Documents

Publication Publication Date Title
GB2151357A (en) Ultrasonic echo sounding systems
ATE274707T1 (de) Füllstandmessradargerät
ATE213324T1 (de) Verfahren und vorrichtung zur bestimmung von aus einer schmelze ausgehenden elektromagnetischen wellen
SE9304185D0 (sv) Anordning för bestämning av nivåer för signalöverföringskvalitet
EP0782007A3 (de) Verfahren und Vorrichtung zur Entfernungsmessung
KR870004458A (ko) 감지기 신호 처리기 검사 방법 및 장치
ATE33741T1 (de) Verfahren und vorrichtung zur signalisierung zwischen bildfernsprechapparaten bei einer bestehenden fernsprechverbindung.
ATE263466T1 (de) Vorrichtung und verfahren zur echo-dämpfung
CA2032384A1 (en) Remote instrument testing system
ATE195812T1 (de) Verfahren und vorrichtung zur abstandsmessung
DE59401968D1 (de) Verfahren und vorrichtung zur messung des abstandes eines objektes von einer ultraschall-sende-empfangseinheit
ATE176052T1 (de) Verfahren und vorrichtung zur drehzahlerfassung
JPH07146208A (ja) 光導波路ファイバにおける反射型不連続性を検知する方法
AUPM411294A0 (en) Evaluation of signal processor performance
NO934015L (no) Fremgangsmåte og anordning for digitalt å behandle og filtrere signaler i industrielle styresystemer
FR2374779A1 (fr) Procede de modulation delta
DE60101969D1 (de) Gerät zur Erkennung der Anwesenheit von Sekretionen in den Atmungsorganen eines Patienten
ATE160657T1 (de) Verfahren zur verstärkungsregelung in einem digitalen empfänger, insbesondere einem tdma- empfänger und vorrichtung zur durchführung des verfahrens
ATE376295T1 (de) Verfahren und vorrichtung zur beurteilung der übertragungsqualität
ATE153773T1 (de) Verfahren und vorrichtung zur überwachung des zustanden einer empfangsantenne
AU5685196A (en) A method of measuring on an optical fibre
ATE167765T1 (de) Methode zur einstellung eines adaptiven exponentialfilters und adaptives exponentialfilter
ATE142807T1 (de) Verfahren und vorrichtung zur kompensation der feuchtigkeit in einem streulichtmelder
DE50307050D1 (de) Vorrichtung und Verfahren zur Detektion von Kondensation an einer Messoberfläche
EP0517359A3 (de) Verfahren und Vorrichtung zur Überprüfung von Geschwindigkeitsmessungen

Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8328 Change in the person/name/address of the agent

Representative=s name: BECKER, KURIG, STRAUS, 80336 MUENCHEN