BR9806811B1 - método e aparelho para utilização no aperfeiçoamento da qualidade de tráfego de voz num sistema de telefonia. - Google Patents
método e aparelho para utilização no aperfeiçoamento da qualidade de tráfego de voz num sistema de telefonia.Info
- Publication number
- BR9806811B1 BR9806811B1 BRPI9806811-3A BR9806811A BR9806811B1 BR 9806811 B1 BR9806811 B1 BR 9806811B1 BR 9806811 A BR9806811 A BR 9806811A BR 9806811 B1 BR9806811 B1 BR 9806811B1
- Authority
- BR
- Brazil
- Prior art keywords
- improving
- quality
- telephone system
- voice traffic
- traffic
- Prior art date
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)
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 BR9806811A (pt) | 2000-05-16 |
BR9806811B1 true 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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002514318A (ja) * | 1997-01-31 | 2002-05-14 | ティ―ネティックス,インコーポレイテッド | 録音された音声を検出するシステムおよび方法 |
US6940971B1 (en) * | 1997-08-21 | 2005-09-06 | Siemens Schweiz Ag | Method and system for activating echo suppression in a communications network |
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)
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 |
CA2116584C (en) * | 1991-08-30 | 1999-01-19 | Vijay R. Raman | 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 |
-
1997
- 1997-01-31 US US08/792,866 patent/US6055311A/en not_active Expired - Lifetime
-
1998
- 1998-01-15 BR BRPI9806811-3A patent/BR9806811B1/pt not_active IP Right Cessation
- 1998-01-15 AU AU58875/98A patent/AU5887598A/en not_active Abandoned
- 1998-01-15 CA CA002278095A patent/CA2278095C/en not_active Expired - Lifetime
- 1998-01-15 DE DE69836262T patent/DE69836262T2/de not_active Expired - Lifetime
- 1998-01-15 CN CN98802176A patent/CN1127814C/zh not_active Expired - Fee Related
- 1998-01-15 JP JP53277698A patent/JP4350803B2/ja not_active Expired - Lifetime
- 1998-01-15 EP EP98902319A patent/EP0956657B1/en not_active Expired - Lifetime
- 1998-01-15 WO PCT/SE1998/000060 patent/WO1998034353A1/en active IP Right Grant
- 1998-01-16 TW TW087100575A patent/TW381388B/zh not_active IP Right Cessation
- 1998-01-19 MY MYPI98000209A patent/MY119564A/en unknown
Also Published As
Publication number | Publication date |
---|---|
DE69836262T2 (de) | 2007-05-24 |
WO1998034353A1 (en) | 1998-08-06 |
EP0956657B1 (en) | 2006-10-25 |
EP0956657A1 (en) | 1999-11-17 |
TW381388B (en) | 2000-02-01 |
CN1246224A (zh) | 2000-03-01 |
BR9806811A (pt) | 2000-05-16 |
MY119564A (en) | 2005-06-30 |
JP2001509350A (ja) | 2001-07-10 |
DE69836262D1 (de) | 2006-12-07 |
CA2278095A1 (en) | 1998-08-06 |
US6055311A (en) | 2000-04-25 |
CA2278095C (en) | 2008-03-18 |
AU5887598A (en) | 1998-08-25 |
JP4350803B2 (ja) | 2009-10-21 |
CN1127814C (zh) | 2003-11-12 |
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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. |
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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. |
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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. |