MX9700353A - Expancion de microfono para reduccion de ruido de fondo. - Google Patents

Expancion de microfono para reduccion de ruido de fondo.

Info

Publication number
MX9700353A
MX9700353A MX9700353A MX9700353A MX9700353A MX 9700353 A MX9700353 A MX 9700353A MX 9700353 A MX9700353 A MX 9700353A MX 9700353 A MX9700353 A MX 9700353A MX 9700353 A MX9700353 A MX 9700353A
Authority
MX
Mexico
Prior art keywords
amplifier
electrical signals
gain level
signals
output
Prior art date
Application number
MX9700353A
Other languages
English (en)
Other versions
MXPA97000353A (es
Inventor
Scott L Furgues
Michael Francon
Original Assignee
Lucent Technologies 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 Lucent Technologies Inc filed Critical Lucent Technologies Inc
Publication of MXPA97000353A publication Critical patent/MXPA97000353A/es
Publication of MX9700353A publication Critical patent/MX9700353A/es

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/60—Substation equipment, e.g. for use by subscribers including speech amplifiers
    • H04M1/6008—Substation equipment, e.g. for use by subscribers including speech amplifiers in the transmitter circuit
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G7/00—Volume compression or expansion in amplifiers
    • H03G7/002—Volume compression or expansion in amplifiers in untuned or low-frequency amplifiers, e.g. audio amplifiers
    • H03G7/005—Volume compression or expansion in amplifiers in untuned or low-frequency amplifiers, e.g. audio amplifiers using discontinuously variable devices, e.g. switch-operated
    • 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

Abstract

Se describe un aparato para reducir el ruido de fondo en un dispositivo de telecomunicaciones, el dispositivo de telecomunicaciones incluye un microfono para recibir señales eléctricas correspondientes de las mismas, las señales acusticas incluyen señales vocales y señales de ruido. El aparato de la presente invencion en una modalidad incluye un amplificador que tiene una entrada para recibir las señales eléctricas del microfono y una salida, el amplificador opera para recibir la señales eléctricas en la primer entrada y proporciona amplificacion a las señales eléctricas para producir señales eléctricas amplificadas. El amplificador opera además para proporcionar amplificacion a un primer nivel de ganancia y un segundo nivel de ganancia, el primer nivel de ganancia excede el segundo nivel de ganancia. El aparato también incluye u dispositivo de retroalimentacion conectado a la salida del amplificador y está conectado además de manera operable para controlar la operacion del amplificador. El dispositivo de retroalimentacion opera para hacer que el amplificador proporcione amplificacion del primer nivel de ganancia cuando el dispositivo de retroalimentacion recibe señales eléctricas amplificadas en la salida que tienen una amplitud inferior a un umbral predeterminado y hace que el amplificador proporcione amplificacion al segundo nivel de ganancia cuando el dispositivo de retroalimentacion recibe señales eléctricas amplificada en la salida que tiene una amplitud inferior al umbral predeterminado.
MX9700353A 1996-01-16 1997-01-13 Expancion de microfono para reduccion de ruido de fondo. MX9700353A (es)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08585969 1996-01-16
US08/585,969 US5708722A (en) 1996-01-16 1996-01-16 Microphone expansion for background noise reduction

Publications (2)

Publication Number Publication Date
MXPA97000353A MXPA97000353A (es) 1998-04-01
MX9700353A true MX9700353A (es) 1998-04-30

Family

ID=24343746

Family Applications (1)

Application Number Title Priority Date Filing Date
MX9700353A MX9700353A (es) 1996-01-16 1997-01-13 Expancion de microfono para reduccion de ruido de fondo.

Country Status (5)

Country Link
US (1) US5708722A (es)
EP (1) EP0785659A3 (es)
JP (1) JP3174739B2 (es)
CA (1) CA2192498C (es)
MX (1) MX9700353A (es)

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FI99062C (fi) * 1995-10-05 1997-09-25 Nokia Mobile Phones Ltd Puhesignaalin taajuuskorjaus matkapuhelimessa
JP3785718B2 (ja) * 1997-02-21 2006-06-14 松下電器産業株式会社 音響再生装置
JPH10341256A (ja) * 1997-06-10 1998-12-22 Logic Corp 音声から有音を抽出し、抽出有音から音声を再生する方法および装置
US6157908A (en) * 1998-01-27 2000-12-05 Hm Electronics, Inc. Order point communication system and method
US6353808B1 (en) * 1998-10-22 2002-03-05 Sony Corporation Apparatus and method for encoding a signal as well as apparatus and method for decoding a signal
US6360203B1 (en) 1999-05-24 2002-03-19 Db Systems, Inc. System and method for dynamic voice-discriminating noise filtering in aircraft
US6711259B1 (en) * 1999-11-22 2004-03-23 Lucent Technologies Inc Method and apparatus for noise suppression and side-tone generation
JP2001166782A (ja) * 1999-12-07 2001-06-22 Nec Corp 報知信号発生方法及び装置
US20020075965A1 (en) * 2000-12-20 2002-06-20 Octiv, Inc. Digital signal processing techniques for improving audio clarity and intelligibility
JP2002169933A (ja) * 2000-11-30 2002-06-14 Nec Mobiling Ltd 保育業務支援方法及びシステム
CA2435771A1 (en) * 2002-07-22 2004-01-22 Chelton Avionics, Inc. Dynamic noise supression voice communication device
US6988068B2 (en) * 2003-03-25 2006-01-17 International Business Machines Corporation Compensating for ambient noise levels in text-to-speech applications
KR100638337B1 (ko) * 2005-09-05 2006-10-24 주식회사 비손하이테크 주변소음 제거장치 및 방법과 이를 구비한 이동통신 단말기
JP5197458B2 (ja) * 2009-03-25 2013-05-15 株式会社東芝 受音信号処理装置、方法およびプログラム
US9706302B2 (en) * 2014-02-05 2017-07-11 Sennheiser Communications A/S Loudspeaker system comprising equalization dependent on volume control
US11288363B2 (en) * 2019-01-30 2022-03-29 Dell Products L.P. System and method of microphone intrusion detection and notification
US11210398B2 (en) 2019-01-30 2021-12-28 Dell Products L.P. System and method of webcam intrusion detection and notification

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3691311A (en) * 1970-12-10 1972-09-12 Pacific Plantronics Inc Telephone user set
NL8403200A (nl) * 1984-10-22 1986-05-16 Philips Nv Lawaaiafhankelijke- en spraakonafhankelijke volumeregeling.
US4630305A (en) * 1985-07-01 1986-12-16 Motorola, Inc. Automatic gain selector for a noise suppression system
US4630304A (en) * 1985-07-01 1986-12-16 Motorola, Inc. Automatic background noise estimator for a noise suppression system
US4847897A (en) 1987-12-11 1989-07-11 American Telephone And Telegraph Company Adaptive expander for telephones
IL84948A0 (en) * 1987-12-25 1988-06-30 D S P Group Israel Ltd Noise reduction system
GB8823080D0 (en) * 1988-09-30 1988-11-09 Stc Plc Noise reduction in speech transmitter circuits
US5235637A (en) * 1989-01-26 1993-08-10 Plantronics, Inc. Voice communication link interface
US5097510A (en) * 1989-11-07 1992-03-17 Gs Systems, Inc. Artificial intelligence pattern-recognition-based noise reduction system for speech processing
US5182527A (en) * 1990-03-30 1993-01-26 Oki Electric Industry Co., Ltd. Power amplifying apparatus for wireless transmitter

Also Published As

Publication number Publication date
JP3174739B2 (ja) 2001-06-11
EP0785659A3 (en) 1999-10-06
CA2192498C (en) 1999-11-02
CA2192498A1 (en) 1997-07-17
US5708722A (en) 1998-01-13
JPH09205472A (ja) 1997-08-05
EP0785659A2 (en) 1997-07-23

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