BR9806811A - Processo e aparelho para utilização no aperfeiçoamento da qualidade de tráfego de voz num sistema de telefonia. - Google Patents

Processo e aparelho para utilização no aperfeiçoamento da qualidade de tráfego de voz num sistema de telefonia.

Info

Publication number
BR9806811A
BR9806811A BR9806811-3A BR9806811A BR9806811A BR 9806811 A BR9806811 A BR 9806811A BR 9806811 A BR9806811 A BR 9806811A BR 9806811 A BR9806811 A BR 9806811A
Authority
BR
Brazil
Prior art keywords
echo cancellation
route
call
parameter settings
specific
Prior art date
Application number
BR9806811-3A
Other languages
English (en)
Other versions
BR9806811B1 (pt
Inventor
Torkel Dreyfert
Petros Ortolanis
Original Assignee
Ericsson Telefon Ab L M
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 Ericsson Telefon Ab L M filed Critical Ericsson Telefon Ab L M
Publication of BR9806811A publication Critical patent/BR9806811A/pt
Publication of BR9806811B1 publication Critical patent/BR9806811B1/pt

Links

Classifications

    • 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
    • H04B3/23—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other using a replica of transmitted signal in the time domain, e.g. echo cancellers

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Telephonic Communication Services (AREA)

Abstract

"PROCESSO E APARELHO PARA UTILIZAçãO NO APERFEIçOAMENTO DA QUALIDADE DE TRáFEGO DE VOZ NUM SISTEMA DE TELEFONIA". Trata-se de uma configuração de conjunto (110) de dispositivos de cancelamento de eco que permite a um usuário (102) determinar previamente e individualizar os ajustes de parâmetros de cancelamento de eco (Fig. 8) para qualquer dispositivo de cancelamento de eco do conjunto, com base no conhecimento prévio das características de percurso de eco da rota de transmissão específica que será utilizada para uma chamada subseq³ente. O dispositivo de cancelamento de eco com os ajustes de parâmetros individualizados é então comutado para essa rota durante toda a duração da chamada. Por exemplo, na fase de estabelecimento da chamada, quando tiver sido identificada uma rota de tronco que será utilizada para completar a chamada, é recuperado um "sinalizador" ("flag") que é associado à rota específica. Esse "sinalizador" ("flag") identifica ajustes de parâmetros de cancelamento de eco específicos devendo ser utilizados para essa rota. Esses ajustes de parâmetros são descarregados para o dispositivo de cancelamento de eco selecionado do conjunto (110), e esse dispositivo é então comutado para o tronco específico envolvido.
BRPI9806811-3A 1997-01-31 1998-01-15 método e aparelho para utilização no aperfeiçoamento da qualidade de tráfego de voz num sistema de telefonia. BR9806811B1 (pt)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/792,866 US6055311A (en) 1997-01-31 1997-01-31 Dynamic echo canceller and parameter selection in telephony systems
PCT/SE1998/000060 WO1998034353A1 (en) 1997-01-31 1998-01-15 Dynamic echo canceller and parameter selection in telephony systems

Publications (2)

Publication Number Publication Date
BR9806811A true BR9806811A (pt) 2000-05-16
BR9806811B1 BR9806811B1 (pt) 2011-10-04

Family

ID=25158318

Family Applications (1)

Application Number Title Priority Date Filing Date
BRPI9806811-3A BR9806811B1 (pt) 1997-01-31 1998-01-15 método e aparelho para utilização no aperfeiçoamento da qualidade de tráfego de voz num sistema de telefonia.

Country Status (11)

Country Link
US (1) US6055311A (pt)
EP (1) EP0956657B1 (pt)
JP (1) JP4350803B2 (pt)
CN (1) CN1127814C (pt)
AU (1) AU5887598A (pt)
BR (1) BR9806811B1 (pt)
CA (1) CA2278095C (pt)
DE (1) DE69836262T2 (pt)
MY (1) MY119564A (pt)
TW (1) TW381388B (pt)
WO (1) WO1998034353A1 (pt)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998034216A2 (en) * 1997-01-31 1998-08-06 T-Netix, Inc. System and method for detecting a recorded voice
EP0937363B1 (de) * 1997-08-21 2006-02-15 Siemens Schweiz AG Verfahren zum bereitstellen von einrichtungen zur echounterdrückung in einem kommunikationsnetz
US6404887B1 (en) * 1998-06-24 2002-06-11 Mci Communications Corporation Intra-call control of ancillary telecommunications equipment
US7106856B1 (en) * 2000-01-12 2006-09-12 Avaya Technology Corp. Method and apparatus for performing echo cancellation within a communication network
FI20001517A (fi) 2000-06-26 2001-12-27 Nokia Networks Oy Menetelmä ja järjestelmä tietoliikennesignaalien käsittelemiseen
US7321568B2 (en) * 2001-06-01 2008-01-22 Texas Instruments Incorporated Realtime management of processing resources
GB0212397D0 (en) 2002-05-29 2002-07-10 Mitel Knowledge Corp Line echo cancellation system
US7251213B2 (en) * 2002-09-17 2007-07-31 At&T Corp. Method for remote measurement of echo path delay
US7352858B2 (en) * 2004-06-30 2008-04-01 Microsoft Corporation Multi-channel echo cancellation with round robin regularization
US9185233B2 (en) * 2010-05-25 2015-11-10 Intel Deutschland Gmbh Audio communication device and method using fixed echo cancellation filter coefficients

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3769466A (en) * 1970-10-14 1973-10-30 Siemens Ag Telephone transmission system with echo suppressors
JPS60121856A (ja) * 1983-12-06 1985-06-29 Nec Corp 単一周波数信号検出回路
JPH03159423A (ja) * 1989-11-17 1991-07-09 Fujitsu Ltd エコーキャンセラにおけるダブルトーク検出方式
JP2518433B2 (ja) * 1990-01-24 1996-07-24 日本電気株式会社 ダブルト―ク検出回路
US5195132B1 (en) * 1990-12-03 1996-03-19 At & T Bell Lab Telephone network speech signal enhancement
JP2794999B2 (ja) * 1991-08-14 1998-09-10 国際電信電話株式会社 エコーキャンセル方式
EP0601082A4 (en) * 1991-08-30 1996-05-15 Digital Sound Corp Adaptive echo canceller for voice messaging system.
JPH0583753A (ja) * 1991-09-25 1993-04-02 Nec Corp エコーキヤンセラー収容方式
FI89658C (fi) * 1991-11-04 1993-10-25 Nokia Telecommunications Oy Arrangemang foer styrning av en ekoslaeckare
KR960010891B1 (ko) * 1993-10-19 1996-08-10 재단법인 한국전자통신연구소 반향제거 기능의 장애발생시 통화유지가 가능한 통화경로 스위칭 제어장치 및 방법
JP3123690B2 (ja) * 1993-04-28 2001-01-15 日本電信電話株式会社 動的ルーチング制御方法
US5473686A (en) * 1994-02-01 1995-12-05 Tandy Corporation Echo cancellation apparatus
JPH07288493A (ja) * 1994-04-18 1995-10-31 Fujitsu Ltd ダブルトーク検出装置
US5689556A (en) * 1995-09-15 1997-11-18 Hughes Electronics Method of detecting narrow-band signals in an echo canceller

Also Published As

Publication number Publication date
WO1998034353A1 (en) 1998-08-06
JP4350803B2 (ja) 2009-10-21
CN1127814C (zh) 2003-11-12
BR9806811B1 (pt) 2011-10-04
TW381388B (en) 2000-02-01
DE69836262D1 (de) 2006-12-07
CA2278095A1 (en) 1998-08-06
DE69836262T2 (de) 2007-05-24
EP0956657B1 (en) 2006-10-25
JP2001509350A (ja) 2001-07-10
MY119564A (en) 2005-06-30
EP0956657A1 (en) 1999-11-17
CN1246224A (zh) 2000-03-01
US6055311A (en) 2000-04-25
CA2278095C (en) 2008-03-18
AU5887598A (en) 1998-08-25

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Legal Events

Date Code Title Description
B09A Decision: intention to grant [chapter 9.1 patent gazette]
B16A Patent or certificate of addition of invention granted

Free format text: PRAZO DE VALIDADE: 10 (DEZ) ANOS CONTADOS A PARTIR DE 04/10/2011, OBSERVADAS AS CONDICOES LEGAIS.

B24H Lapse because of non-payment of annual fees (definitively: art 78 iv lpi)
B24F Patent annual fee: publication cancelled

Free format text: ANULADA A PUBLICACAO CODIGO 24.8 NA RPI NO 2259 DE 22/04/2014 POR TER SIDO INDEVIDA.

B21F Lapse acc. art. 78, item iv - on non-payment of the annual fees in time

Free format text: REFERENTE AS 13A, 14A, 15A, 16A, 17A, 18A, 19A, 20A, 21A E 22A ANUIDADES.

B24J Lapse because of non-payment of annual fees (definitively: art 78 iv lpi, resolution 113/2013 art. 12)

Free format text: EM VIRTUDE DA EXTINCAO PUBLICADA NA RPI 2607 DE 22-12-2020 E CONSIDERANDO AUSENCIA DE MANIFESTACAO DENTRO DOS PRAZOS LEGAIS, INFORMO QUE CABE SER MANTIDA A EXTINCAO DA PATENTE E SEUS CERTIFICADOS, CONFORME O DISPOSTO NO ARTIGO 12, DA RESOLUCAO 113/2013.