ES2055797T3 - Dispositivo de calibracion acustica para un telefono de manos libres conmutado por voz. - Google Patents

Dispositivo de calibracion acustica para un telefono de manos libres conmutado por voz.

Info

Publication number
ES2055797T3
ES2055797T3 ES89313286T ES89313286T ES2055797T3 ES 2055797 T3 ES2055797 T3 ES 2055797T3 ES 89313286 T ES89313286 T ES 89313286T ES 89313286 T ES89313286 T ES 89313286T ES 2055797 T3 ES2055797 T3 ES 2055797T3
Authority
ES
Spain
Prior art keywords
telephone
headphone
acoustic
acoustics
switched
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
ES89313286T
Other languages
English (en)
Inventor
Richard Henry Erving
Robert Raymond Ii Miller
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.)
AT&T Corp
Original Assignee
AT&T 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 AT&T Corp filed Critical AT&T Corp
Application granted granted Critical
Publication of ES2055797T3 publication Critical patent/ES2055797T3/es
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/04—Selecting arrangements for multiplex systems for time-division multiplexing
    • 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
    • H04M9/085—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic using digital techniques

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Telephone Function (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
  • Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)

Abstract

UN CIRCUITO DE CALIBRACION ACUSTICA (113) EN UN AURICULAR TELEFONICO ADAPTABLE CONMUTADO POR LA VOZ HUMANA DETERMINA EL TIPO DE ENTORNO ACUSTICO EN EL QUE SE EMPLEA EL AURICULAR TELEFONICO. EL CIRCUITO DE CALIBRACION MIDE LA ACUSTICA DEL ESPACIO EMITIENDO UN AUMENTO BRUSCO DEL TONO A TRAVES DE UN ALTAVOZ (112), ASOCIADO CON EL AURICULAR TELEFONICO Y MIDIENDO LA RESPUESTA ACUSTICA DE DOMINIO TEMPORAL RETORNADA CON UN MICROFONO (111), TAMBIEN ASOCIADO CON EL AURICULAR TELEFONICO. OBTENIDO DESDE ESTA REPUESTA Y PROCESADO POR UN ORDENADOR (110) EN EL AURICULAR TELEFONICO SE ENCUENTRAN LA AMPLITUD MAXIMA DE LA SEÑAL RETORNADA, Y LA DURACION DE LOS ECOS. LA AMPLITUD DE LA SEÑAL RETORNADA DETERMINA QUE NIVEL DE DISCURSO DE TRANSMISION SERA NECESARIO PARA INTERRUMPIR LA SEÑAL DE VOZ DE RECEPCION. TANTO MAYOR SEA EL RETORNO ACUSTICO, TANTO MAYOR DEBERA SER ESE UMBRAL PARA PROTEGER CONTRA LA CONMUTACION PROPIA. Y LA DURACION DE LOS ECOS DETERMINA CUAN RAPIDAMENTE SE DISIPARA LA ENERGIA DE CONVERSACION INYECTADA EN EL ESPACIO, QUE, A SU VEZ, CONTROLA LA RAPIDEZ CON QUE EL AURICULAR TELEFONICO PUEDE CONMUTAR DESDE UN ESTATO DE RECEPCION AL DE TRANSMISION. SI LA ACUSTICA DEL ESPACIO ES ESTRIDENTE, EL AURICULAR TELEFONICO SE ADAPTA MANTENIENDO SU RESPUESTA DE CONMUTACION COMPARABLE A LA DE UN AURICULAR TELEFONICO ANALOGICO TIPICO. SI LA ACUSTICA ES FAVORABLE, SIN EMBARGO, EL AURICULAR TELEFONICO ACELERA EL TIEMPO DE CONMUTACION, REDUCE TANTO LOS UMBRALES DE INTERRUPCION COMO LA CANTIDAD TOTAL DE ATENUACION CONMUTADA. ESTA DISMINUCION DE ATENUACION CONMUTADA, MIENTRAS QUE EL AURICULAR TELEFONICO ESTA EN UN BUEN ENTORNO ACUSTICO, PROPORCIONA AL USUARIO CON UN RENDIMIENTO PERCEPTIBLE MAS TRANSPARENTE.
ES89313286T 1988-12-28 1989-12-19 Dispositivo de calibracion acustica para un telefono de manos libres conmutado por voz. Expired - Lifetime ES2055797T3 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US07/298,526 US4959857A (en) 1988-12-28 1988-12-28 Acoustic calibration arrangement for a voice switched speakerphone

Publications (1)

Publication Number Publication Date
ES2055797T3 true ES2055797T3 (es) 1994-09-01

Family

ID=23150901

Family Applications (1)

Application Number Title Priority Date Filing Date
ES89313286T Expired - Lifetime ES2055797T3 (es) 1988-12-28 1989-12-19 Dispositivo de calibracion acustica para un telefono de manos libres conmutado por voz.

Country Status (9)

Country Link
US (1) US4959857A (es)
EP (1) EP0376587B1 (es)
JP (1) JPH02264548A (es)
KR (1) KR0163026B1 (es)
AU (1) AU615822B2 (es)
CA (1) CA2004170C (es)
DE (1) DE68916219T2 (es)
ES (1) ES2055797T3 (es)
HK (1) HK127695A (es)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5187741A (en) * 1990-11-30 1993-02-16 At&T Bell Laboratories Enhanced acoustic calibration procedure for a voice switched speakerphone
CA2086522C (en) * 1991-04-30 1996-12-24 Yuji Umemoto Speech communication apparatus equipped with echo canceller
US5297198A (en) * 1991-12-27 1994-03-22 At&T Bell Laboratories Two-way voice communication methods and apparatus
US5502717A (en) * 1994-08-01 1996-03-26 Motorola Inc. Method and apparatus for estimating echo cancellation time
US5715309A (en) * 1995-03-03 1998-02-03 Advanced Micro Devices, Inc. Conversion of compressed speech codes between attenuated and unattenuated formats
JP2928130B2 (ja) * 1995-04-19 1999-08-03 埼玉日本電気株式会社 ハンズフリー通信装置
US5844994A (en) * 1995-08-28 1998-12-01 Intel Corporation Automatic microphone calibration for video teleconferencing
US6175634B1 (en) 1995-08-28 2001-01-16 Intel Corporation Adaptive noise reduction technique for multi-point communication system
US5598466A (en) * 1995-08-28 1997-01-28 Intel Corporation Voice activity detector for half-duplex audio communication system
US5838787A (en) * 1996-06-27 1998-11-17 Northern Telecom Limited Method and system for controlling echo return loss using a complementary variolosses in transmit path
US6377679B1 (en) * 1996-12-26 2002-04-23 Kabushiki Kaisha Kobe Seiko Sho Speakerphone
US6385176B1 (en) 1998-06-04 2002-05-07 Lucent Technologies Inc. Communication system based on echo canceler tap profile
JP3929686B2 (ja) * 2000-08-14 2007-06-13 松下電器産業株式会社 音声スイッチング装置およびその方法
GB2375688B (en) * 2001-05-14 2004-09-29 Motorola Ltd Telephone apparatus and a communication method using such apparatus
GB2375686B (en) * 2001-05-14 2004-10-27 Motorola Ltd Telecommunication apparatus and a communication method using such apparatus
GB2377353B (en) 2001-07-03 2005-06-29 Mitel Corp Loudspeaker telephone equalization method and equalizer for loudspeaker telephone
WO2008133686A1 (en) * 2007-04-27 2008-11-06 Hewlett-Packard Development Company, L.P. System and method of calibrating an echo canceller using preemptive tone sequencing
CN101415141B (zh) * 2008-11-21 2012-06-13 瑞声声学科技(常州)有限公司 麦克风响应时间的测量系统及其测量方法
US9020161B2 (en) * 2012-03-08 2015-04-28 Harman International Industries, Incorporated System for headphone equalization
US10978086B2 (en) * 2019-07-19 2021-04-13 Apple Inc. Echo cancellation using a subset of multiple microphones as reference channels

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3425618A (en) * 1967-12-04 1969-02-04 Comet Packaging Corp Litter bag
US3725585A (en) * 1972-03-21 1973-04-03 Itt Loudspeaking telephone station circuit
JPS535008B2 (es) * 1972-05-15 1978-02-23
US4368361A (en) * 1980-07-28 1983-01-11 Bell Telephone Laboratories, Incorporated Automatically adjustable bidirectional-to-unidirectional transmission network
JPS5890832A (ja) * 1981-11-26 1983-05-30 Toshiba Corp 反響打消し装置
JPS5977710A (ja) * 1982-10-02 1984-05-04 Fujitsu Ltd マイクロホン増巾回路
JPS59193660A (ja) * 1983-04-18 1984-11-02 Nec Corp 会議電話装置
JPS60117928A (ja) * 1983-11-30 1985-06-25 Fujitsu Ltd エコ−キヤンセラの収束方式
JPS60126950A (ja) * 1983-12-13 1985-07-06 Toshiba Corp 拡声電話装置
JPS613536A (ja) * 1984-06-18 1986-01-09 Toshiba Corp 反響信号打消し装置
GB2161047B (en) * 1984-06-28 1987-09-16 Stc Plc Improvements in telephone instruments
JPS61195061A (ja) * 1985-02-25 1986-08-29 Fujitsu Ltd 音声会議装置の音量調整器
JPS6260343A (ja) * 1985-09-10 1987-03-17 Seiko Epson Corp 電話器
US4636586A (en) * 1985-09-20 1987-01-13 Rca Corporation Speakerphone with adaptive cancellation of room echoes
JPS6288465A (ja) * 1985-10-14 1987-04-22 Nec Corp 電話機

Also Published As

Publication number Publication date
AU615822B2 (en) 1991-10-10
JPH02264548A (ja) 1990-10-29
EP0376587B1 (en) 1994-06-15
EP0376587A3 (en) 1990-12-05
CA2004170A1 (en) 1990-06-28
US4959857A (en) 1990-09-25
CA2004170C (en) 1994-07-19
AU4722789A (en) 1990-07-05
DE68916219D1 (de) 1994-07-21
KR900011322A (ko) 1990-07-11
DE68916219T2 (de) 1995-02-09
EP0376587A2 (en) 1990-07-04
HK127695A (en) 1995-08-18
JPH0544219B2 (es) 1993-07-05
KR0163026B1 (ko) 1998-12-01

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