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
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
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Multimedia (AREA)
- Control Of Amplification And Gain Control (AREA)
- Amplifiers (AREA)
- Tone Control, Compression And Expansion, Limiting Amplitude (AREA)
- Telephone Set Structure (AREA)
- Noise Elimination (AREA)
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.
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) |
Families Citing this family (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
US20040196984A1 (en) * | 2002-07-22 | 2004-10-07 | Dame Stephen G. | Dynamic noise suppression 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)
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 |
-
1996
- 1996-01-16 US US08/585,969 patent/US5708722A/en not_active Expired - Lifetime
- 1996-12-10 CA CA002192498A patent/CA2192498C/en not_active Expired - Fee Related
-
1997
- 1997-01-07 EP EP97300067A patent/EP0785659A3/en not_active Withdrawn
- 1997-01-13 MX MX9700353A patent/MX9700353A/es unknown
- 1997-01-13 JP JP00350697A patent/JP3174739B2/ja not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
CA2192498A1 (en) | 1997-07-17 |
EP0785659A3 (en) | 1999-10-06 |
CA2192498C (en) | 1999-11-02 |
US5708722A (en) | 1998-01-13 |
JP3174739B2 (ja) | 2001-06-11 |
JPH09205472A (ja) | 1997-08-05 |
EP0785659A2 (en) | 1997-07-23 |
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