IT1206478B - Circuito per l'attenuazione controllata dei percorsi del parlato di trasmissione e di ricezione di un apparecchio telefonico a viva voce ed apparecchio telefonico incorporante tale circuito. - Google Patents

Circuito per l'attenuazione controllata dei percorsi del parlato di trasmissione e di ricezione di un apparecchio telefonico a viva voce ed apparecchio telefonico incorporante tale circuito.

Info

Publication number
IT1206478B
IT1206478B IT8521356A IT2135685A IT1206478B IT 1206478 B IT1206478 B IT 1206478B IT 8521356 A IT8521356 A IT 8521356A IT 2135685 A IT2135685 A IT 2135685A IT 1206478 B IT1206478 B IT 1206478B
Authority
IT
Italy
Prior art keywords
circuit
courses
speech
reception
transmission
Prior art date
Application number
IT8521356A
Other languages
English (en)
Other versions
IT8521356A0 (it
Inventor
Kenneth Alexander Manson Arton
Original Assignee
Int 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 Int Standard Electric Corp filed Critical Int Standard Electric Corp
Publication of IT8521356A0 publication Critical patent/IT8521356A0/it
Application granted granted Critical
Publication of IT1206478B publication Critical patent/IT1206478B/it

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)
  • Analogue/Digital Conversion (AREA)
  • Interface Circuits In Exchanges (AREA)
IT8521356A 1984-06-28 1985-06-28 Circuito per l'attenuazione controllata dei percorsi del parlato di trasmissione e di ricezione di un apparecchio telefonico a viva voce ed apparecchio telefonico incorporante tale circuito. IT1206478B (it)

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
IT8521356A0 IT8521356A0 (it) 1985-06-28
IT1206478B true IT1206478B (it) 1989-04-27

Family

ID=10563086

Family Applications (1)

Application Number Title Priority Date Filing Date
IT8521356A IT1206478B (it) 1984-06-28 1985-06-28 Circuito per l'attenuazione controllata dei percorsi del parlato di trasmissione e di ricezione di un apparecchio telefonico a viva voce ed apparecchio telefonico incorporante tale circuito.

Country Status (7)

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

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
EP0290952B1 (de) * 1987-05-15 1992-11-04 Alcatel SEL Aktiengesellschaft Schaltungsanordnung zur Sprachsteuerung für ein Endgerät der Nachrichtentechnik
CA1291837C (en) * 1987-07-15 1991-11-05 Juro Ohga Electronic telephone terminal having noise suppression function
US4879745A (en) * 1988-10-12 1989-11-07 Ibm Corporation Half-duplex speakerphone
US4887288A (en) * 1988-12-28 1989-12-12 American Telephone And Telegraph Company Self calibration arrangement for a voice switched speakerphone
US4901346A (en) * 1988-12-28 1990-02-13 American Telephone And Telegraph Co. Computer controlled speakerphone for adapting to a communication line
US5007046A (en) * 1988-12-28 1991-04-09 At&T Bell Laboratories Computer controlled adaptive speakerphone
US4959857A (en) * 1988-12-28 1990-09-25 At&T Bell Laboratories Acoustic calibration arrangement for a voice switched speakerphone
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 (en) * 1991-09-27 2000-05-23 Gordon J. Reesor Telephone handsfree algorithm
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
FR2566980A1 (fr) 1986-01-03
GB2161047A (en) 1986-01-02
ES8609854A1 (es) 1986-07-16
JPS6115451A (ja) 1986-01-23
AU4346785A (en) 1986-01-02
GB8416415D0 (en) 1984-08-01
GB2161047B (en) 1987-09-16
IT8521356A0 (it) 1985-06-28
DE3522915A1 (de) 1986-01-09
ES544628A0 (es) 1986-07-16

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