BR9207028A - Aparelho para reduzir o risco de desvio indesejável dos parâmetros de um filtro adaptador usuado para cancelamento de eco - Google Patents

Aparelho para reduzir o risco de desvio indesejável dos parâmetros de um filtro adaptador usuado para cancelamento de eco

Info

Publication number: BR9207028A
Authority: BR; Brazil
Prior art keywords: branch; transmitting; signal; filter; risk
Prior art date: 1992-01-10

Application number

BR9207028A

Other languages

English (en)

Inventor

Tore Mikael Andre

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.)

1992-01-10

Filing date

1992-12-17

Publication date

1995-12-05

1992-12-17 Application filed by Ericsson Telefon Ab L M filed Critical Ericsson Telefon Ab L M

1995-12-05 Publication of BR9207028A publication Critical patent/BR9207028A/pt

Classifications

- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H21/00—Adaptive networks
- H03H21/0012—Digital adaptive filters
- H03H21/0067—Means or methods for compensation of undesirable effects
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H21/00—Adaptive networks
- 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)
Filters That Use Time-Delay Elements (AREA)

BR9207028A 1992-01-10 1992-12-17 Aparelho para reduzir o risco de desvio indesejável dos parâmetros de um filtro adaptador usuado para cancelamento de eco BR9207028A (pt)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
SE9200062A SE469677B (sv)	1992-01-10	1992-01-10	Anordning foer att minska risken foer en icke oenskad parameterdrift hos ett adaptivt filter som anvaends foer ekoeliminering
PCT/SE1992/000872 WO1993014566A1 (en)	1992-01-10	1992-12-17	Apparatus for reducing the risk of undesirable parameterdrift of an adaptive filter used for echo cancellation

Publications (1)

Publication Number	Publication Date
BR9207028A true BR9207028A (pt)	1995-12-05

Family

ID=20384984

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
BR9207028A BR9207028A (pt)	1992-01-10	1992-12-17	Aparelho para reduzir o risco de desvio indesejável dos parâmetros de um filtro adaptador usuado para cancelamento de eco

Country Status (15)

Country	Link
US (1)	US5428681A (pt)
EP (1)	EP0620956B1 (pt)
JP (1)	JPH07503109A (pt)
KR (1)	KR940704084A (pt)
AT (1)	ATE214850T1 (pt)
AU (1)	AU665231B2 (pt)
BR (1)	BR9207028A (pt)
CA (1)	CA2125658A1 (pt)
DE (1)	DE69232501D1 (pt)
ES (1)	ES2173092T3 (pt)
FI (1)	FI943271A0 (pt)
MX (1)	MX9300074A (pt)
NO (1)	NO306278B1 (pt)
SE (1)	SE469677B (pt)
WO (1)	WO1993014566A1 (pt)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE4430189A1 (de) *	1994-08-25	1996-02-29	Sel Alcatel Ag	Verfahren zur adaptiven Echokompensation
US5852661A (en) *	1995-02-17	1998-12-22	Advanced Micro Devices, Inc.	Adaptive echo cancellation used with echo suppression to reduce short and long duration echoes
US5592548A (en) *	1995-05-31	1997-01-07	Qualcomm Incorporated	System and method for avoiding false convergence in the presence of tones in a time-domain echo cancellation process
US5689556A (en) *	1995-09-15	1997-11-18	Hughes Electronics	Method of detecting narrow-band signals in an echo canceller
US6728223B1 (en)	1996-06-28	2004-04-27	Mci Communications Corporation	Echo canceller system
EP0972357A2 (en) *	1998-01-30	2000-01-19	Koninklijke Philips Electronics N.V.	A method for cancelling echoes in a communication system, a communication device, and a radio base station of a cordless telephone device
TW441171B (en) *	1999-09-16	2001-06-16	Ind Tech Res Inst	Learning method and apparatus for adaptive digital filter

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US4672665A (en) *	1984-07-27	1987-06-09	Matsushita Electric Industrial Co. Ltd.	Echo canceller
US4712235A (en) *	1984-11-19	1987-12-08	International Business Machines Corporation	Method and apparatus for improved control and time sharing of an echo canceller
CA1242541A (en) *	1985-11-25	1988-09-27	Dany Sylvain	Echo cancellation in two-wire transmission path repeaters
US4845746A (en) *	1987-06-23	1989-07-04	Rockwell International Corporation	Echo canceller with relative feedback control
DE3840433A1 (de) *	1988-12-01	1990-06-07	Philips Patentverwaltung	Echokompensator

1992
- 1992-01-10 SE SE9200062A patent/SE469677B/sv not_active IP Right Cessation
- 1992-12-17 CA CA002125658A patent/CA2125658A1/en not_active Abandoned
- 1992-12-17 WO PCT/SE1992/000872 patent/WO1993014566A1/en active IP Right Grant
- 1992-12-17 AU AU34117/93A patent/AU665231B2/en not_active Ceased
- 1992-12-17 BR BR9207028A patent/BR9207028A/pt not_active IP Right Cessation
- 1992-12-17 JP JP5512372A patent/JPH07503109A/ja active Pending
- 1992-12-17 KR KR1019940702392A patent/KR940704084A/ko not_active Application Discontinuation
- 1992-12-17 ES ES93902608T patent/ES2173092T3/es not_active Expired - Lifetime
- 1992-12-17 EP EP93902608A patent/EP0620956B1/en not_active Expired - Lifetime
- 1992-12-17 AT AT93902608T patent/ATE214850T1/de not_active IP Right Cessation
- 1992-12-17 DE DE69232501T patent/DE69232501D1/de not_active Expired - Lifetime
1993
- 1993-01-08 MX MX9300074A patent/MX9300074A/es not_active IP Right Cessation
1994
- 1994-06-24 NO NO942418A patent/NO306278B1/no unknown
- 1994-07-07 US US08/271,246 patent/US5428681A/en not_active Expired - Lifetime
- 1994-07-08 FI FI943271A patent/FI943271A0/fi unknown

Also Published As

Publication number	Publication date
DE69232501D1 (de)	2002-04-25
EP0620956B1 (en)	2002-03-20
AU665231B2 (en)	1995-12-21
ES2173092T3 (es)	2002-10-16
SE9200062L (sv)	1993-07-11
EP0620956A1 (en)	1994-10-26
CA2125658A1 (en)	1993-07-22
AU3411793A (en)	1993-08-03
NO942418L (no)	1994-06-24
KR940704084A (ko)	1994-12-12
JPH07503109A (ja)	1995-03-30
ATE214850T1 (de)	2002-04-15
FI943271A (fi)	1994-07-08
US5428681A (en)	1995-06-27
NO942418D0 (pt)	1994-06-24
WO1993014566A1 (en)	1993-07-22
FI943271A0 (fi)	1994-07-08
SE469677B (sv)	1993-08-16
MX9300074A (es)	1993-07-01
NO306278B1 (no)	1999-10-11
SE9200062D0 (sv)	1992-01-10

Publication	Publication Date	Title
AU680981B2 (en)	1997-08-14	Method for determining the location of echo in an echo cancellar
MX9800175A (es)	1998-11-29	Compensacion de ruido espectral para cancelacion de eco.
DE69533375D1 (de)	2004-09-16	Echokompensator und Echopfadschätzungsverfahren
SE9704026D0 (sv)	1997-11-04	Spread spectrum signaldemodulator
CA2189489A1 (en)	1998-05-04	Method and apparatus for reducing residual far-end echo in voice communication networks
ATE341129T1 (de)	2006-10-15	Echokompensation und -unterdrückung
EP0766413A3 (en)	1998-12-16	Fast response gain tracker for echo canceller
EP0766412A3 (en)	1998-12-09	Echo canceller using initial training
BR9207028A (pt)	1995-12-05	Aparelho para reduzir o risco de desvio indesejável dos parâmetros de um filtro adaptador usuado para cancelamento de eco
SE9803640D0 (sv)	1998-10-23	Double-talk insensitive NLMS algorithm
DK0635178T3 (da)	1999-11-15	Fremgangsmåde til undgåelse af selvsving i forbindelse med ekkoundertrykkelse
SE8205840D0 (sv)	1982-10-14	Ekoeliminator
SE8205839L (sv)	1983-04-24	Ekoeliminator
SE9503545L (sv)	1997-04-12	Adaptivt ekosläckningsförfarande
FR2686988B1 (fr)	1994-04-29	Dispositif de compensation de desequilibre d'un etage d'entree.
ES2021285B3 (es)	1991-11-01	Compensador de eco
MX9605354A (es)	1998-05-31	Metodo y aparato para reducir el eco residual del extremo lejano en redes de comunicacion de voz.
TW296528B (en)	1997-01-21	Method and apparatus for detecting a near-end speech signal
SE9804505D0 (sv)	1998-12-22	Echo and distortion cancellation arrangement

Legal Events

Date	Code	Title	Description
1996-04-02	EE	Request for examination
1998-12-29	FF	Decision: intention to grant
1999-06-29	FG9A	Patent or certificate of addition granted
2010-12-14	B24C	Patent annual fee: request for for restoration	Free format text: REFERENTE A 8A, 9A , 10A , 11A , 12A , 13A , 14A , 15A , 16A , 17A E 18A ANUIDADES.
2014-08-26	B24H	Lapse because of non-payment of annual fees (definitively: art 78 iv lpi)
2020-12-08	B24F	Patent annual fee: publication cancelled	Free format text: ANULADA A PUBLICACAO CODIGO 24.8 NA RPI NO 2277 DE 26/08/2014 POR TER SIDO INDEVIDA.
2020-12-15	B21F	Lapse acc. art. 78, item iv - on non-payment of the annual fees in time	Free format text: REFERENTE AS 8A, 9A, 10A, 11A, 12A, 13A, 14A, 15A, 16A, 17A E 18A ANUIDADES.
2021-03-30	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 2606 DE 15-12-2020 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.