WO1999007134A1 - Systeme mains libres - Google Patents

Systeme mains libres Download PDF

Info

Publication number
WO1999007134A1
WO1999007134A1 PCT/DE1998/001041 DE9801041W WO9907134A1 WO 1999007134 A1 WO1999007134 A1 WO 1999007134A1 DE 9801041 W DE9801041 W DE 9801041W WO 9907134 A1 WO9907134 A1 WO 9907134A1
Authority
WO
WIPO (PCT)
Prior art keywords
stroke
signal branch
hands
value
free system
Prior art date
Application number
PCT/DE1998/001041
Other languages
German (de)
English (en)
Inventor
Rolf Oberstelehn
Original Assignee
Siemens Aktiengesellschaft
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 Siemens Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Priority to EP98931905A priority Critical patent/EP1000501A1/fr
Publication of WO1999007134A1 publication Critical patent/WO1999007134A1/fr

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

Definitions

  • a hands-free device known per se has a transmission signal branch via which the signals picked up by a microphone MK are sent via a microphone amplifier MV and a transmission attenuation stage SD to an electronic fork EG, for example.
  • the electronic fork EG is preferably connected to an analog subscriber line, a so-called a / b line.
  • the hands-free device also has a reception signal branch, via which the signals applied to the electronic fork EG are sent to a loudspeaker LP via an amplifier V, a reception attenuation stage ED and a playback amplifier WV.
  • the transmission and reception damping stages are controlled by a stroke control HS.

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Telephone Function (AREA)

Abstract

L'invention concerne un procédé pour réguler la déviation d'un système mains libres comportant une branche de signal émis (MK, MV) et une branche de signal reçu (WV, LP), comprenant chacune des étages d'affaiblissement réglables (SD, ED). Selon ce procédé, une valeur est déterminée pour le couplage à bifurcation (GK), et une valeur de déviation est réglée pour la commande des étages d'affaiblissement (SD, ED).
PCT/DE1998/001041 1997-07-28 1998-04-09 Systeme mains libres WO1999007134A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP98931905A EP1000501A1 (fr) 1997-07-28 1998-04-09 Systeme mains libres

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19732440 1997-07-28
DE19732440.1 1997-07-28

Publications (1)

Publication Number Publication Date
WO1999007134A1 true WO1999007134A1 (fr) 1999-02-11

Family

ID=7837133

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1998/001041 WO1999007134A1 (fr) 1997-07-28 1998-04-09 Systeme mains libres

Country Status (2)

Country Link
EP (1) EP1000501A1 (fr)
WO (1) WO1999007134A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5735457A (en) * 1980-08-12 1982-02-26 Oki Electric Ind Co Ltd Loudspeaker telephone set system
US4513177A (en) * 1980-12-09 1985-04-23 Nippon Telegraph & Telephone Public Corporation Loudspeaking telephone system
US5014294A (en) * 1990-02-01 1991-05-07 Motorola Inc. Speakerphone for cellular telephones with howl prevention, detection, elimination and determination

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5735457A (en) * 1980-08-12 1982-02-26 Oki Electric Ind Co Ltd Loudspeaker telephone set system
US4513177A (en) * 1980-12-09 1985-04-23 Nippon Telegraph & Telephone Public Corporation Loudspeaking telephone system
US5014294A (en) * 1990-02-01 1991-05-07 Motorola Inc. Speakerphone for cellular telephones with howl prevention, detection, elimination and determination

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 006, no. 103 (E - 112) 12 June 1982 (1982-06-12) *

Also Published As

Publication number Publication date
EP1000501A1 (fr) 2000-05-17

Similar Documents

Publication Publication Date Title
DE4215096A1 (de) Funksprechsystem fuer schnurlose telefone tragbarer telefoneinheiten
DE60017732T2 (de) Dynamikregelung für lautsprecher
EP1118245B1 (fr) Dispositif de terminaison de ligne pour une ligne de raccordement d'abonne
DE60121490T2 (de) Digitales schnurloses Telefonsystem mit Lautsprecher-funktion in dem entferten Handapparat
DE4214844C2 (de) Verfahren und Anordnung zur Rufübergabe bei tragbaren Telefonen
EP0519551A1 (fr) Annuleur d'écho avec dispositif de commande pour un écrêteur de centre
DE2714132C3 (de) Schaltungsanordnung für ein sprachgesteuertes Lautfernsprechgerät
DE69728150T2 (de) Dynamische optimierung für mikrofonverstärkung in einer freisprecheinrichtung
DE19600965C2 (de) Mobiles Fernsprechendgerät
DE4221397C2 (de) Integrierte PCM-Codec-Schaltung für ein Vermittlungssystem
WO1999007134A1 (fr) Systeme mains libres
DE1166278B (de) Schaltung zur Echounterdrueckung in einer Zweiweg-Signaluebertragungsanlage
EP0118920A2 (fr) Centrale téléphonique automatique à fonctionnement "mains-libres"
DE3839627C2 (de) Fernsprechendgerät
EP0800739B1 (fr) Dispositif mains libres pour un poste terminal numerique de communications
EP0193733B1 (fr) Procédé d'adaptation d'un circuit hybride amplificateur à une ligne de télécommunication et dispositif pour sa mise en oeuvre
DE19508223C1 (de) Telekommunikationseinrichtung mit variabler Leitungsanpassung
DE3034569C2 (de) Sprachgesteuerte Lautfernsprechanlage
EP0731591B1 (fr) Dispositif de télécommunication avec adaptation de ligne variable
DE2739778A1 (de) Digitale fernmeldevermittlungsanlage und teilnehmerstation dazu
EP0992151B1 (fr) Procede et dispositif permettant d'attenuer l'echo dans un dispositif mains libres, tel qu'un telephone
DE4228407C2 (de) Teilnehmer für eine Gesellschaftsleitung sowie Verfahren zum Aufbau einer Verbindung zwischen Teilnehmern einer Gesellschaftsleitung
EP1847139B1 (fr) Procede et systeme de communication pour transmettre des signaux vocaux et element de reseau de configuration pour mettre en oeuvre ce procede
EP0235529A2 (fr) Montage pour dispositifs à mains libres et à écoute amplifiée dans des appareils téléphoniques
DE3219953C2 (de) Überleitanordnung für die Überleitung von Gesprächen von einer Zweidrahtleitung auf ein Wechselsprechfunkgerät

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): BR CN

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
121 Ep: the epo has been informed by wipo that ep was designated in this application
WWE Wipo information: entry into national phase

Ref document number: 1998931905

Country of ref document: EP

WWP Wipo information: published in national office

Ref document number: 1998931905

Country of ref document: EP

WWR Wipo information: refused in national office

Ref document number: 1998931905

Country of ref document: EP

WWW Wipo information: withdrawn in national office

Ref document number: 1998931905

Country of ref document: EP