ES8609854A1 - Un circuito de atenuacion controlada para los caminos de conversacion de transmision y recepcion para un instrumento telefonico de manos libres - Google Patents

Un circuito de atenuacion controlada para los caminos de conversacion de transmision y recepcion para un instrumento telefonico de manos libres

Info

Publication number
ES8609854A1
ES8609854A1 ES544628A ES544628A ES8609854A1 ES 8609854 A1 ES8609854 A1 ES 8609854A1 ES 544628 A ES544628 A ES 544628A ES 544628 A ES544628 A ES 544628A ES 8609854 A1 ES8609854 A1 ES 8609854A1
Authority
ES
Spain
Prior art keywords
paths
telephone instruments
words
hands
comparison
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
Application number
ES544628A
Other languages
English (en)
Spanish (es)
Other versions
ES544628A0 (es
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.)
International Standard Electric Corp
Original Assignee
International Standard Electric 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 International Standard Electric Corp filed Critical International Standard Electric Corp
Publication of ES8609854A1 publication Critical patent/ES8609854A1/es
Publication of ES544628A0 publication Critical patent/ES544628A0/es
Expired legal-status Critical Current

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
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/20—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Analogue/Digital Conversion (AREA)
ES544628A 1984-06-28 1985-06-27 Un circuito de atenuacion controlada para los caminos de conversacion de transmision y recepcion para un instrumento telefonico de manos libres Expired ES8609854A1 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB08416415A GB2161047B (en) 1984-06-28 1984-06-28 Improvements in telephone instruments

Publications (2)

Publication Number Publication Date
ES8609854A1 true ES8609854A1 (es) 1986-07-16
ES544628A0 ES544628A0 (es) 1986-07-16

Family

ID=10563086

Family Applications (1)

Application Number Title Priority Date Filing Date
ES544628A Expired ES8609854A1 (es) 1984-06-28 1985-06-27 Un circuito de atenuacion controlada para los caminos de conversacion de transmision y recepcion para un instrumento telefonico de manos libres

Country Status (7)

Country Link
JP (1) JPS6115451A (fr)
AU (1) AU4346785A (fr)
DE (1) DE3522915A1 (fr)
ES (1) ES8609854A1 (fr)
FR (1) FR2566980A1 (fr)
GB (1) GB2161047B (fr)
IT (1) IT1206478B (fr)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4724540A (en) * 1986-09-02 1988-02-09 Motorola, Inc. Speakerphone with fast idle mode
GB2197166A (en) * 1986-11-07 1988-05-11 Storno As Controlling gain in speech-controlled telephones
ES2037128T3 (es) * 1987-05-15 1993-06-16 Alcatel N.V. Circuito de control de voz para un terminal de telecomunicaciones.
CA1291837C (fr) * 1987-07-15 1991-11-05 Juro Ohga Poste telephonique a suppression du bruit
US4879745A (en) * 1988-10-12 1989-11-07 Ibm Corporation Half-duplex speakerphone
US4959857A (en) * 1988-12-28 1990-09-25 At&T Bell Laboratories Acoustic calibration arrangement for a voice switched speakerphone
US4887288A (en) * 1988-12-28 1989-12-12 American Telephone And Telegraph Company Self calibration arrangement for a voice switched speakerphone
US5007046A (en) * 1988-12-28 1991-04-09 At&T Bell Laboratories Computer controlled adaptive speakerphone
US4901346A (en) * 1988-12-28 1990-02-13 American Telephone And Telegraph Co. Computer controlled speakerphone for adapting to a communication line
KR920017511A (ko) * 1991-02-28 1992-09-26 빈센트 죠셉 로너 집적된 스피커폰 회로 및 스피커폰용 직렬 포트 인터페이스
DE4130045A1 (de) * 1991-09-10 1993-03-18 Standard Elektrik Lorenz Ag Schaltungsanordnung zur dynamiksteuerung eines sprachendgeraetes
CA2052351C (fr) * 1991-09-27 2000-05-23 Gordon J. Reesor Circuit de telephone a mains libres
DE4416550C1 (de) * 1994-05-10 1995-09-21 Siemens Ag Schaltungsanordnung für Fernsprechendgeräte mit dem Leistungsmerkmal "Lauthören"
US6978009B1 (en) 1996-08-20 2005-12-20 Legerity, Inc. Microprocessor-controlled full-duplex speakerphone using automatic gain control
JPH10304030A (ja) * 1997-04-28 1998-11-13 Saitama Nippon Denki Kk 携帯電話装置
FR3028375B1 (fr) * 2014-11-07 2017-11-24 Euro Prot Surveillance Procede de communication vocale, interface audio d'un systeme d'alarme social et systeme d'alarme social

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA996692A (en) * 1974-12-12 1976-09-07 Russell W. Brown Digital control of a loudspeaking telephone system
DE2651688A1 (de) * 1976-11-12 1978-05-24 Siemens Ag Schaltungsanordnung fuer sprachgesteuerte freisprechgeraete
JPS5797262A (en) * 1980-12-09 1982-06-16 Nippon Telegr & Teleph Corp <Ntt> Loud speaker telephone set system
GB2122851B (en) * 1982-06-10 1986-03-19 Standard Telephones Cables Ltd Loudspeaking telephones

Also Published As

Publication number Publication date
DE3522915A1 (de) 1986-01-09
ES544628A0 (es) 1986-07-16
FR2566980A1 (fr) 1986-01-03
GB2161047B (en) 1987-09-16
IT8521356A0 (it) 1985-06-28
AU4346785A (en) 1986-01-02
IT1206478B (it) 1989-04-27
GB2161047A (en) 1986-01-02
GB8416415D0 (en) 1984-08-01
JPS6115451A (ja) 1986-01-23

Similar Documents

Publication Publication Date Title
ES8609854A1 (es) Un circuito de atenuacion controlada para los caminos de conversacion de transmision y recepcion para un instrumento telefonico de manos libres
SE8107354L (sv) Hogtalartelefonanleggning
AU8001387A (en) Active attenuation system with increased dynamic range
MY122083A (en) Echo canceler for non-linear circuits
ES2070138T3 (es) Telefono de manos libres que utiliza audio comprimido digitalmente para la deteccion de realimentacion acustica.
ES8503907A1 (es) Un dispositivo para telefono de manos libres
AU2215192A (en) Digital control circuit
EP0129208A3 (fr) Circuit &#34;à mains-libres&#34; pour appareil téléphonique
ES8402684A1 (es) Perfeccionamientos en circuitos telefonicos de altavoz.
DE3167719D1 (en) Telephone circuit
HK32496A (en) Variable gain analog-to-digital conversion apparatus and method
GB1519607A (en) Digital control of a loudspeaking telephone system
JPS56141620A (en) Output error compensating circuit of digital-to-analog converter
ES8400638A1 (es) &#34;perfeccionamientos introducidos en un metodo para determinar la amplitud y-o el nivel medio de corriente continua que aparece en un periodo de tiempo dado en una senal analogica&#34;.
ES8800535A1 (es) Metodo para convertir una primera senal modulada en delta con una primera frecuencia de bits en una segunda senal modulada en delta con una segunda frecuencia de bits
JPS55128958A (en) Talking system
JPS56156039A (en) Pcm communication system
JPS5735457A (en) Loudspeaker telephone set system
SE7501942L (fr)
JPS5624897A (en) Attenuation quantity set system
JPS5678237A (en) Radio telephone set
JPS57142063A (en) Audio switch circuit
JPS5765014A (en) Digital control attenuator
JPS6439193A (en) Microphone device
JPS644119A (en) Audio output device