ATE30821T1 - Adaptiver echokompensator. - Google Patents
Adaptiver echokompensator.Info
- Publication number
- ATE30821T1 ATE30821T1 AT84101659T AT84101659T ATE30821T1 AT E30821 T1 ATE30821 T1 AT E30821T1 AT 84101659 T AT84101659 T AT 84101659T AT 84101659 T AT84101659 T AT 84101659T AT E30821 T1 ATE30821 T1 AT E30821T1
- Authority
- AT
- Austria
- Prior art keywords
- tap coefficient
- adaptive echo
- values
- polarities
- correction signal
- Prior art date
Links
- 230000003044 adaptive effect Effects 0.000 title abstract 2
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
-
- 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
- H04B3/238—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 using initial training sequence
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP58024709A JPS59151546A (ja) | 1983-02-18 | 1983-02-18 | 適応形反響消去装置 |
EP84101659A EP0116968B1 (de) | 1983-02-18 | 1984-02-17 | Adaptiver Echokompensator |
Publications (1)
Publication Number | Publication Date |
---|---|
ATE30821T1 true ATE30821T1 (de) | 1987-11-15 |
Family
ID=12145698
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AT84101659T ATE30821T1 (de) | 1983-02-18 | 1984-02-17 | Adaptiver echokompensator. |
Country Status (7)
Country | Link |
---|---|
US (1) | US4633046A (de) |
EP (1) | EP0116968B1 (de) |
JP (1) | JPS59151546A (de) |
AT (1) | ATE30821T1 (de) |
AU (1) | AU569977B2 (de) |
CA (1) | CA1219648A (de) |
DE (1) | DE3467483D1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4317043B4 (de) * | 1993-05-21 | 2004-03-25 | Deutsche Telekom Ag | Verfahren und Vorrichtung zur Echokompensation in Übertragungssystemen |
Families Citing this family (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4769808A (en) * | 1984-09-19 | 1988-09-06 | Nec Corporation | Method of cancelling echoes in full-duplex data transmission system |
US4697261A (en) * | 1986-09-05 | 1987-09-29 | M/A-Com Government Systems, Inc. | Linear predictive echo canceller integrated with RELP vocoder |
US5305309A (en) * | 1989-12-06 | 1994-04-19 | Fujitsu Limited | Echo canceller |
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 |
JPH03262939A (ja) * | 1990-03-14 | 1991-11-22 | Fujitsu Ltd | エコー経路変動検出方法およびその装置 |
US5305307A (en) * | 1991-01-04 | 1994-04-19 | Picturetel Corporation | Adaptive acoustic echo canceller having means for reducing or eliminating echo in a plurality of signal bandwidths |
US5263019A (en) * | 1991-01-04 | 1993-11-16 | Picturetel Corporation | Method and apparatus for estimating the level of acoustic feedback between a loudspeaker and microphone |
KR950006697B1 (ko) * | 1992-06-09 | 1995-06-21 | 대우전자주식회사 | 적응적 하울링 제거 장치 |
US5365583A (en) * | 1992-07-02 | 1994-11-15 | Polycom, Inc. | Method for fail-safe operation in a speaker phone system |
US5598420A (en) * | 1993-10-08 | 1997-01-28 | Abb Power T&D Company, Inc. | Apparatus and method for generating a power signal for a power system from signals genenrated by a communication device |
US5526426A (en) * | 1994-11-08 | 1996-06-11 | Signalworks | System and method for an efficiently constrained frequency-domain adaptive filter |
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 |
US6181793B1 (en) | 1997-11-14 | 2001-01-30 | Tellabs Operations, Inc. | Echo canceller employing dual-H architecture having improved coefficient transfer |
US6028929A (en) * | 1997-11-14 | 2000-02-22 | Tellabs Operations, Inc. | Echo canceller employing dual-H architecture having improved non-linear echo path detection |
US6240180B1 (en) * | 1997-11-14 | 2001-05-29 | Tellabs Operations, Inc. | Echo canceller employing dual-H architecture having split adaptive gain settings |
US6031908A (en) * | 1997-11-14 | 2000-02-29 | Tellabs Operations, Inc. | Echo canceller employing dual-H architecture having variable adaptive gain settings |
US7123651B2 (en) * | 2002-07-31 | 2006-10-17 | Lsi Logic Corporation | Adaptable hybrid and selection method for ADSL modem data rate improvement |
US20040151241A1 (en) * | 2003-02-03 | 2004-08-05 | Tsutomu Shimotoyodome | Signal generator using IIR type digital filter and its output stopping method |
US7483931B2 (en) * | 2004-01-30 | 2009-01-27 | Oki Electric Industry Co., Ltd. | Signal generator using IIR type digital filter; and method of generating, supplying, and stopping its output signal |
US9613634B2 (en) * | 2014-06-19 | 2017-04-04 | Yang Gao | Control of acoustic echo canceller adaptive filter for speech enhancement |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS579258B1 (de) * | 1971-05-15 | 1982-02-20 | ||
US3787645A (en) * | 1971-05-19 | 1974-01-22 | Nippon Electric Co | Echo canceller having two echo path models |
US3836734A (en) * | 1971-12-03 | 1974-09-17 | Communications Satellite Corp | Adaptive echo canceller with multi-increment gain coefficient corrections |
FR2272544B1 (de) * | 1974-05-24 | 1977-03-11 | Cit Alcatel | |
US4126770A (en) * | 1975-11-07 | 1978-11-21 | Kokusai Denshin Denwa Kabushiki Kaisha | Echo canceller |
US4064379A (en) * | 1976-06-11 | 1977-12-20 | Communications Satellite Corporation | Logarithmic echo canceller |
US4243959A (en) * | 1979-06-21 | 1981-01-06 | Bell Telephone Laboratories, Incorporated | Adaptive filter with tap coefficient leakage |
NL7905577A (nl) * | 1979-07-18 | 1981-01-20 | Philips Nv | Inrichting met een niet-recursieffilter. |
JPS56153850A (en) * | 1980-04-28 | 1981-11-28 | Kokusai Denshin Denwa Co Ltd <Kdd> | Echo control system |
FR2496364A1 (fr) * | 1980-12-17 | 1982-06-18 | Trt Telecom Radio Electr | Annuleur d'echo pour transmission telephonique par voies numeriques mettant en oeuvre une loi de codage pseudo-logarithmique |
DE3120434A1 (de) * | 1981-05-22 | 1982-12-16 | Standard Elektrik Lorenz Ag, 7000 Stuttgart | Adaptive echokompensationseinrichtung zur digitalen duplexuebertragung auf zweidrahtleitungen |
SE426764B (sv) * | 1981-11-02 | 1983-02-07 | Ellemtel Utvecklings Ab | Forfarande att astadkomma adaptiv ekoeliminering vid overforing av digital information i duplex jemte anordning for utforande av forfarandet |
IT1208769B (it) * | 1983-10-12 | 1989-07-10 | Cselt Centro Studi Lab Telecom | Teristiche varianti nel tempo procedimento e dispositivo per la cancellazione numerica dell eco generato in collegamenti con carat |
-
1983
- 1983-02-18 JP JP58024709A patent/JPS59151546A/ja active Granted
-
1984
- 1984-02-16 US US06/580,922 patent/US4633046A/en not_active Expired - Lifetime
- 1984-02-16 AU AU24664/84A patent/AU569977B2/en not_active Expired
- 1984-02-17 AT AT84101659T patent/ATE30821T1/de not_active IP Right Cessation
- 1984-02-17 EP EP84101659A patent/EP0116968B1/de not_active Expired
- 1984-02-17 DE DE8484101659T patent/DE3467483D1/de not_active Expired
- 1984-02-17 CA CA000447767A patent/CA1219648A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4317043B4 (de) * | 1993-05-21 | 2004-03-25 | Deutsche Telekom Ag | Verfahren und Vorrichtung zur Echokompensation in Übertragungssystemen |
Also Published As
Publication number | Publication date |
---|---|
AU2466484A (en) | 1984-08-23 |
US4633046A (en) | 1986-12-30 |
DE3467483D1 (en) | 1987-12-17 |
JPS59151546A (ja) | 1984-08-30 |
CA1219648A (en) | 1987-03-24 |
AU569977B2 (en) | 1988-02-25 |
EP0116968A1 (de) | 1984-08-29 |
EP0116968B1 (de) | 1987-11-11 |
JPH0527287B2 (de) | 1993-04-20 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
ATE30821T1 (de) | Adaptiver echokompensator. | |
JPS52132723A (en) | Solid state pick up unit | |
ES256309Y (es) | Junta de estanqueidad contra agentes atmosfericos. | |
IT1207479B (it) | Rubinetto con maschio sferiforme. | |
JPS5475922A (en) | Pulse noise limiter circuit | |
NO155045C (no) | Undervannskip. | |
ATE40026T1 (de) | Signalausfall-korrigierschaltung zum korrigieren von durch signalausfaelle gestoerten videosignalen. | |
DK0635178T3 (da) | Fremgangsmåde til undgåelse af selvsving i forbindelse med ekkoundertrykkelse | |
DE3887057T2 (de) | Adaptiver Echokompensator mit Doppel-Spracherkennung. | |
DE3576104D1 (de) | Unterwasserschall-sende-empfangswandler. | |
NO166074C (no) | Skipsskrog. | |
JPS5330840A (en) | Reduction system of power consumption | |
JPS57186867A (en) | Voice storing and reproducing system | |
JPS6414629A (en) | Coordinate reader | |
JPS5755660A (en) | Voice and data separating circuit | |
SU751098A1 (ru) | Концентрированный алкогольный напиток | |
JPS5412415A (en) | Inverter protection system | |
NL190444B (nl) | Elastische bevestiging van opbouwen, zoals dekhuizen en dergelijke op een scheepsdek. | |
AU536238B2 (en) | Reducing boiler corrosion | |
JPS531502A (en) | Impulsive noise reducing system | |
SU1108693A1 (ru) | Топливная система летательного аппарата | |
DE3481847D1 (de) | Regenerierung des nad(p)-cofaktors. | |
JPS55137760A (en) | Conference service system | |
JPS5437624A (en) | Phase calibration system of facsimile equipment | |
JPS5374309A (en) | Adaptive echo eraser |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
UEP | Publication of translation of european patent specification | ||
EELA | Cancelled due to lapse of time |