MX170764B - Metodo para suprimir activamente la retrolimentacion de un dispositivo radiotelefonico - Google Patents
Metodo para suprimir activamente la retrolimentacion de un dispositivo radiotelefonicoInfo
- Publication number
- MX170764B MX170764B MX024424A MX2442491A MX170764B MX 170764 B MX170764 B MX 170764B MX 024424 A MX024424 A MX 024424A MX 2442491 A MX2442491 A MX 2442491A MX 170764 B MX170764 B MX 170764B
- Authority
- MX
- Mexico
- Prior art keywords
- volume
- condition
- microphone
- speaker
- retrolimentation
- Prior art date
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)
- Mobile Radio Communication Systems (AREA)
- Monitoring And Testing Of Exchanges (AREA)
- Amplifiers (AREA)
- Steroid Compounds (AREA)
- Control Of Amplification And Gain Control (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
- Devices For Supply Of Signal Current (AREA)
Abstract
La presente invención se refiere a un método para suprimir activamente la retroalimentación en un dispositivo para la comunicación que tiene una ganancia de bucle del sistema, una señal de audio recibida, una señal de audio transmitida, y un volumen de usuario igual a un volumen de altavoz más un volumen de micrófono, el método está caracterizado por que comprende los pasos de: A) si el volumen de usuario es menor que la ganancia de bucle del sistema, repetir este paso A; B) disminuir el volumen del latavoz en una primera cantidad predeterminada y si el volumen del micrófono no disminuye en la primera cantidad predeterminada, aumentar el volumen del altavoz en la primera cantidad predeterminada, retardar durante un tiempo predeterminado y repetir desde el paso A; C) aumentar el volumen del altavoz en la primera cantidad predeterminada; D) retardar durante el tiempo predeterminado y repetir desde el paso A si el volumen del micrófono no se incrementa por la primera cantidad predeterminada; E) disminuir el volumen del micrófono y el volumen del altavoz en una segunda cantidad predeterminada hasta que el volumen del usuario sea menor que la ganancia de bucle del sistema; F) aumentar el volumen del micrófono y el volumen del altavoz en una segunda cantidad predeterminada y si el volumen del usuario no es nominal, repetir desde el paso E; y G) repetir desde el paso A.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US07/481,531 US5010570A (en) | 1990-02-20 | 1990-02-20 | Method for active feedback suppression |
Publications (1)
Publication Number | Publication Date |
---|---|
MX170764B true MX170764B (es) | 1993-09-13 |
Family
ID=23912297
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
MX024424A MX170764B (es) | 1990-02-20 | 1991-02-06 | Metodo para suprimir activamente la retrolimentacion de un dispositivo radiotelefonico |
Country Status (8)
Country | Link |
---|---|
US (1) | US5010570A (es) |
EP (1) | EP0469114B1 (es) |
JP (1) | JP2522737B2 (es) |
AT (1) | ATE216545T1 (es) |
CA (1) | CA2048644C (es) |
DE (1) | DE69132988T2 (es) |
MX (1) | MX170764B (es) |
WO (1) | WO1991013508A1 (es) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5210784A (en) * | 1991-06-28 | 1993-05-11 | Lifeline Systems, Inc. | Adaptive speakerphone system |
JPH08263438A (ja) * | 1994-11-23 | 1996-10-11 | Xerox Corp | ディジタルワークの配給及び使用制御システム並びにディジタルワークへのアクセス制御方法 |
US5646990A (en) * | 1995-09-21 | 1997-07-08 | Rockwell International Corporation | Efficient speakerphone anti-howling system |
GB2330744B (en) * | 1997-10-24 | 2002-05-29 | Mitel Corp | Howling controller |
DE19861341B4 (de) * | 1997-10-24 | 2006-06-14 | Zarlink Semiconductor Inc., City Of Ottawa | Vorrichtung zur Vermeidung einer akustischen Rückkopplung |
GB2466454B (en) * | 2008-12-18 | 2011-04-13 | Motorola Inc | Method and system for reducing howling in a half-duplex communication system |
CN105120400A (zh) * | 2015-07-15 | 2015-12-02 | 张阳 | Ktv点歌系统中话筒管理方法及装置 |
US10856078B1 (en) | 2019-05-31 | 2020-12-01 | Bose Corporation | Systems and methods for audio feedback elimination |
CN112511962B (zh) * | 2021-02-01 | 2021-05-18 | 深圳市东微智能科技股份有限公司 | 扩声系统的控制方法、扩声控制装置及存储介质 |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2255762B1 (es) * | 1973-12-21 | 1976-07-23 | Ibm France | |
JPS59193660A (ja) * | 1983-04-18 | 1984-11-02 | Nec Corp | 会議電話装置 |
US4629829A (en) * | 1984-12-14 | 1986-12-16 | Motorola, Inc. | Full duplex speakerphone for radio and landline telephones |
JPH063950B2 (ja) * | 1985-02-28 | 1994-01-12 | 株式会社東芝 | 拡声電話装置 |
US4715063A (en) * | 1985-08-20 | 1987-12-22 | Motorola, Inc. | Speakerphone for radio and landline telephones |
JPH0683305B2 (ja) * | 1987-03-12 | 1994-10-19 | 日本電気株式会社 | 拡声電話機 |
US4843621A (en) * | 1987-04-24 | 1989-06-27 | Motorola, Inc. | Speakerphone using digitally compressed audio to detect acoustic feedback |
US4741018A (en) * | 1987-04-24 | 1988-04-26 | Motorola, Inc. | Speakerphone using digitally compressed audio to control voice path gain |
US4879745A (en) * | 1988-10-12 | 1989-11-07 | Ibm Corporation | Half-duplex speakerphone |
-
1990
- 1990-02-20 US US07/481,531 patent/US5010570A/en not_active Expired - Lifetime
-
1991
- 1991-01-22 CA CA002048644A patent/CA2048644C/en not_active Expired - Fee Related
- 1991-01-22 WO PCT/US1991/000800 patent/WO1991013508A1/en active IP Right Grant
- 1991-01-22 DE DE69132988T patent/DE69132988T2/de not_active Expired - Fee Related
- 1991-01-22 EP EP91904265A patent/EP0469114B1/en not_active Expired - Lifetime
- 1991-01-22 JP JP3504534A patent/JP2522737B2/ja not_active Expired - Fee Related
- 1991-01-22 AT AT91904265T patent/ATE216545T1/de not_active IP Right Cessation
- 1991-02-06 MX MX024424A patent/MX170764B/es unknown
Also Published As
Publication number | Publication date |
---|---|
US5010570A (en) | 1991-04-23 |
WO1991013508A1 (en) | 1991-09-05 |
DE69132988T2 (de) | 2002-10-17 |
EP0469114A4 (en) | 1993-04-07 |
CA2048644A1 (en) | 1991-08-21 |
EP0469114A1 (en) | 1992-02-05 |
ATE216545T1 (de) | 2002-05-15 |
JPH04505541A (ja) | 1992-09-24 |
CA2048644C (en) | 1994-01-25 |
JP2522737B2 (ja) | 1996-08-07 |
DE69132988D1 (de) | 2002-05-23 |
EP0469114B1 (en) | 2002-04-17 |
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