DE69622420D1 - Verfahren und vorrichtung zur reduzierung unerwünschter rückkopplung - Google Patents

Verfahren und vorrichtung zur reduzierung unerwünschter rückkopplung

Info

Publication number
DE69622420D1
DE69622420D1 DE69622420T DE69622420T DE69622420D1 DE 69622420 D1 DE69622420 D1 DE 69622420D1 DE 69622420 T DE69622420 T DE 69622420T DE 69622420 T DE69622420 T DE 69622420T DE 69622420 D1 DE69622420 D1 DE 69622420D1
Authority
DE
Germany
Prior art keywords
reducing unwanted
unwanted feedback
feedback
reducing
unwanted
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
DE69622420T
Other languages
English (en)
Other versions
DE69622420T2 (de
Inventor
Jonathan Highton Stott
Nicholas Dominic Wells
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.)
British Broadcasting Corp
Original Assignee
British Broadcasting 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 British Broadcasting Corp filed Critical British Broadcasting Corp
Application granted granted Critical
Publication of DE69622420D1 publication Critical patent/DE69622420D1/de
Publication of DE69622420T2 publication Critical patent/DE69622420T2/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • H04R3/02—Circuits for transducers, loudspeakers or microphones for preventing acoustic reaction, i.e. acoustic oscillatory feedback
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H21/00—Adaptive networks
    • H03H21/0012—Digital adaptive filters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/155—Ground-based stations
    • H04B7/15564—Relay station antennae loop interference reduction
DE69622420T 1995-10-30 1996-10-30 Verfahren und vorrichtung zur reduzierung unerwünschter rückkopplung Expired - Lifetime DE69622420T2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB9522204.8A GB9522204D0 (en) 1995-10-30 1995-10-30 Method and apparatus for reduction of unwanted feedback
PCT/GB1996/002643 WO1997016942A1 (en) 1995-10-30 1996-10-30 Method and apparatus for reduction of unwanted feedback

Publications (2)

Publication Number Publication Date
DE69622420D1 true DE69622420D1 (de) 2002-08-22
DE69622420T2 DE69622420T2 (de) 2003-02-20

Family

ID=10783108

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69622420T Expired - Lifetime DE69622420T2 (de) 1995-10-30 1996-10-30 Verfahren und vorrichtung zur reduzierung unerwünschter rückkopplung

Country Status (7)

Country Link
US (2) US6269165B1 (de)
EP (1) EP0858720B1 (de)
AU (1) AU7320296A (de)
DE (1) DE69622420T2 (de)
ES (1) ES2180800T3 (de)
GB (1) GB9522204D0 (de)
WO (1) WO1997016942A1 (de)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9522198D0 (en) * 1995-10-30 1996-01-03 British Broadcasting Corp Ofdm active deflectors
GB9522204D0 (en) * 1995-10-30 1996-01-03 British Broadcasting Corp Method and apparatus for reduction of unwanted feedback
US6347148B1 (en) 1998-04-16 2002-02-12 Dspfactory Ltd. Method and apparatus for feedback reduction in acoustic systems, particularly in hearing aids
CA2384629A1 (en) * 1999-09-10 2001-03-15 Starkey Laboratories, Inc. Audio signal processing
US6970568B1 (en) * 1999-09-27 2005-11-29 Electronic Engineering And Manufacturing Inc. Apparatus and method for analyzing an electro-acoustic system
EP1271779A1 (de) * 2001-06-20 2003-01-02 Motorola, Inc. Adaptives Funkfrequenzfilter
DE10155179B4 (de) 2001-11-12 2006-11-23 Andrew Wireless Systems Gmbh Digitaler Repeater mit Bandpassfilterung, adaptiver Vorentzerrung und Unterdrückung der Eigenschwingung
US20040024596A1 (en) * 2002-07-31 2004-02-05 Carney Laurel H. Noise reduction system
GB0510385D0 (en) 2005-05-20 2005-06-29 British Broadcasting Corp Improvements relating to on-channel repeaters
EP1839400B1 (de) * 2005-12-22 2013-02-27 SK Telecom Co., Ltd. Funkrelais für ein mobiles kommunikationssystem und verstärkungsverfahren dafür
US20090297121A1 (en) * 2006-09-20 2009-12-03 Claudio Ingrosso Methods and apparatus for creation, distribution and presentation of polymorphic media
US7889810B2 (en) * 2006-12-15 2011-02-15 Pine Valley Investments, Inc. Method and apparatus for a nonlinear feedback control system
US8867987B2 (en) * 2009-05-11 2014-10-21 Qualcomm Incorporated Gain control metric computation in a wireless repeater
US8548375B2 (en) * 2010-03-12 2013-10-01 Qualcomm Incorporated Gain control metric computation in a wireless repeater
KR20120072243A (ko) * 2010-12-23 2012-07-03 한국전자통신연구원 음향/음성 인식을 위한 잡음 제거 장치 및 그 방법
US10376221B2 (en) * 2016-07-06 2019-08-13 Biosense Webster (Israel) Ltd. Automatic creation of multiple electroanatomic maps
US10998863B2 (en) 2017-10-16 2021-05-04 Analog Devices, Inc. Power amplifier with nulling monitor circuit
US11329620B2 (en) 2018-02-14 2022-05-10 Cirrus Logic, Inc. Tracking and correcting gain of open-loop driver in a multi-path processing system
US10637423B2 (en) * 2018-02-14 2020-04-28 Cirrus Logic, Inc. Tracking and correcting gain of open-loop driver in a multi-path processing system

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2022954B (en) * 1978-03-30 1982-04-07 Secr Defence Transversal filters
JPS5679599A (en) * 1979-11-30 1981-06-30 Sony Corp Loud speaker
FR2505587A1 (fr) * 1981-05-08 1982-11-12 Trt Telecom Radio Electr Dispositif destine a eviter des oscillations entretenues genantes dans un systeme boucle
JPS59214341A (ja) * 1983-05-19 1984-12-04 Matsushita Electric Ind Co Ltd ハウリングキヤンセラ
JPH02155398A (ja) * 1988-12-07 1990-06-14 Biiba Kk ハウリング防止装置
US5091952A (en) * 1988-11-10 1992-02-25 Wisconsin Alumni Research Foundation Feedback suppression in digital signal processing hearing aids
US5259033A (en) * 1989-08-30 1993-11-02 Gn Danavox As Hearing aid having compensation for acoustic feedback
US5168459A (en) * 1991-01-03 1992-12-01 Hewlett-Packard Company Adaptive filter using continuous cross-correlation
US5680467A (en) * 1992-03-31 1997-10-21 Gn Danavox A/S Hearing aid compensating for acoustic feedback
JP2508574B2 (ja) * 1992-11-10 1996-06-19 日本電気株式会社 多チャンネルエコ―除去装置
JP3447060B2 (ja) * 1994-04-12 2003-09-16 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ エコー消去を改善した信号増幅システム
GB9522204D0 (en) * 1995-10-30 1996-01-03 British Broadcasting Corp Method and apparatus for reduction of unwanted feedback

Also Published As

Publication number Publication date
DE69622420T2 (de) 2003-02-20
EP0858720A1 (de) 1998-08-19
EP0858720B1 (de) 2002-07-17
GB9522204D0 (en) 1996-01-03
AU7320296A (en) 1997-05-22
US20020044667A1 (en) 2002-04-18
ES2180800T3 (es) 2003-02-16
US6999594B2 (en) 2006-02-14
US6269165B1 (en) 2001-07-31
WO1997016942A1 (en) 1997-05-09

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Legal Events

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8364 No opposition during term of opposition
8328 Change in the person/name/address of the agent

Representative=s name: 2K PATENTANWAELTE BLASBERG KEWITZ & REICHEL, PARTN