JPS5220288B2 - - Google Patents
Info
- Publication number
- JPS5220288B2 JPS5220288B2 JP48089941A JP8994173A JPS5220288B2 JP S5220288 B2 JPS5220288 B2 JP S5220288B2 JP 48089941 A JP48089941 A JP 48089941A JP 8994173 A JP8994173 A JP 8994173A JP S5220288 B2 JPS5220288 B2 JP S5220288B2
- Authority
- JP
- Japan
- Legal status (The legal status 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 status listed.)
- Expired
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)
- Filters That Use Time-Delay Elements (AREA)
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2239440A DE2239440C3 (de) | 1972-08-10 | 1972-08-10 | Echokompensator für ein Nachrichtenübertragungssystem |
| DE19722239452 DE2239452C3 (de) | 1972-08-10 | 1972-08-10 | Echokompensator für ein Nachrichtenübertragungssystem |
| DE19732334546 DE2334546C2 (de) | 1973-07-06 | 1973-07-06 | Echokompensator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS49124911A JPS49124911A (US08087162-20120103-C00010.png) | 1974-11-29 |
| JPS5220288B2 true JPS5220288B2 (US08087162-20120103-C00010.png) | 1977-06-02 |
Family
ID=27184631
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP48089941A Expired JPS5220288B2 (US08087162-20120103-C00010.png) | 1972-08-10 | 1973-08-10 |
Country Status (9)
Families Citing this family (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2272544B1 (US08087162-20120103-C00010.png) * | 1974-05-24 | 1977-03-11 | Cit Alcatel | |
| FR2277470A1 (fr) * | 1974-07-03 | 1976-01-30 | Cit Alcatel | Dispositif de centrage d'un filtre transversal d'un annuleur d'echo |
| US4024358A (en) * | 1975-10-31 | 1977-05-17 | Communications Satellite Corporation (Comsat) | Adaptive echo canceller using differential pulse code modulation encoding |
| US4087654A (en) * | 1975-11-28 | 1978-05-02 | Bell Telephone Laboratories, Incorporated | Echo canceller for two-wire full duplex data transmission |
| US4057696A (en) * | 1976-08-09 | 1977-11-08 | Bell Telephone Laboratories, Incorporated | Recursive-like adaptive echo canceller |
| US4074086A (en) * | 1976-09-07 | 1978-02-14 | Bell Telephone Laboratories, Incorporated | Joint adaptive echo canceller and equalizer for two-wire full-duplex data transmission |
| SE416367B (sv) * | 1976-09-07 | 1980-12-15 | Western Electric Co | Ekoelimineringsanordning |
| USRE31253E (en) * | 1976-09-07 | 1983-05-24 | Bell Telephone Laboratories, Incorporated | Echo cancellation in two-wire, two-way data transmission systems |
| GB1583634A (en) * | 1977-03-02 | 1981-01-28 | Int Standard Electric Corp | Subscriber line/trunk circuit |
| US4268727A (en) * | 1979-03-14 | 1981-05-19 | International Telephone And Telegraph Corporation | Adaptive digital echo cancellation circuit |
| FR2452215A1 (fr) * | 1979-03-21 | 1980-10-17 | Cit Alcatel | Appareil telephonique a haut-parleur |
| DE2921780C3 (de) * | 1979-05-29 | 1982-02-11 | Siemens AG, 1000 Berlin und 8000 München | Verfahren und Schaltungsanordnung zur Übertragung von Daten über eine Zweidrahtleitung |
| CA1180141A (en) * | 1980-11-15 | 1984-12-27 | Kenzo Takahashi | Echo canceller system |
| FR2526612A1 (fr) * | 1982-05-04 | 1983-11-10 | Thomson Csf Mat Tel | Dispositif numerique de mesure de niveaux d'energie en particulier pour annuleur d'echo |
| US4468641A (en) * | 1982-06-28 | 1984-08-28 | At&T Bell Laboratories | Adaptive filter update normalization |
| US4468640A (en) * | 1982-06-28 | 1984-08-28 | At&T Bell Laboratories | Adaptive filter update normalization |
| JPS5961233A (ja) * | 1982-09-29 | 1984-04-07 | Nec Corp | 適応型反響消去装置 |
| US4669116A (en) * | 1982-12-09 | 1987-05-26 | Regents Of The University Of California | Non-linear echo cancellation of data signals |
| US4591669A (en) * | 1984-09-26 | 1986-05-27 | At&T Bell Laboratories | Adaptive filter update gain normalization |
| US4845746A (en) * | 1987-06-23 | 1989-07-04 | Rockwell International Corporation | Echo canceller with relative feedback control |
| GB8719307D0 (en) * | 1987-08-14 | 1987-09-23 | Gen Electric Co Plc | Echo canceller |
| US4964118A (en) * | 1988-10-24 | 1990-10-16 | Northern Telecom Limited | Apparatus and method for echo cancellation |
| DE3840433A1 (de) * | 1988-12-01 | 1990-06-07 | Philips Patentverwaltung | Echokompensator |
| US5204854A (en) * | 1991-08-23 | 1993-04-20 | Sierra Semiconductor Corporation | Adaptive hybrid |
| US5471527A (en) | 1993-12-02 | 1995-11-28 | Dsc Communications Corporation | Voice enhancement system and method |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3500000A (en) * | 1966-10-31 | 1970-03-10 | Myldred P Kelly | Self-adaptive echo canceller |
| US3508017A (en) * | 1967-12-08 | 1970-04-21 | Bell Telephone Labor Inc | Adaptive echo canceller with an output filter |
| DE1816153B2 (de) * | 1968-12-20 | 1971-04-15 | Schaltungsanordnung zur echounterdrueckung in einem sprech kreis auf einem vierdraht uebertragungssystem bei einem uebergang auf einen zweidrahtuebertragungsweg | |
| US3632905A (en) * | 1969-12-19 | 1972-01-04 | Bell Telephone Labor Inc | Method for improving the settling time of a transversal filter adaptive echo canceller |
| US3647992A (en) * | 1970-03-05 | 1972-03-07 | Bell Telephone Labor Inc | Adaptive echo canceller for nonlinear systems |
| US3787645A (en) * | 1971-05-19 | 1974-01-22 | Nippon Electric Co | Echo canceller having two echo path models |
| US3735055A (en) * | 1971-11-05 | 1973-05-22 | Bell Telephone Labor Inc | Method for improving the settling time of a transversal filter adaptive echo canceller |
-
1973
- 1973-07-26 GB GB3555373A patent/GB1434239A/en not_active Expired
- 1973-08-07 IL IL42921A patent/IL42921A/en unknown
- 1973-08-08 SE SE7310873A patent/SE396180B/xx unknown
- 1973-08-08 IT IT27665/73A patent/IT998331B/it active
- 1973-08-09 NL NL7311057A patent/NL7311057A/xx not_active Application Discontinuation
- 1973-08-09 ES ES417706A patent/ES417706A1/es not_active Expired
- 1973-08-09 US US387123A patent/US3922505A/en not_active Expired - Lifetime
- 1973-08-09 FR FR7329157A patent/FR2195877B1/fr not_active Expired
- 1973-08-10 JP JP48089941A patent/JPS5220288B2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| NL7311057A (US08087162-20120103-C00010.png) | 1974-02-12 |
| ES417706A1 (es) | 1976-06-01 |
| AU5912573A (en) | 1975-02-13 |
| IT998331B (it) | 1976-01-20 |
| GB1434239A (en) | 1976-05-05 |
| FR2195877A1 (US08087162-20120103-C00010.png) | 1974-03-08 |
| US3922505A (en) | 1975-11-25 |
| SE396180B (sv) | 1977-09-05 |
| IL42921A (en) | 1976-10-31 |
| IL42921A0 (en) | 1973-11-28 |
| FR2195877B1 (US08087162-20120103-C00010.png) | 1978-08-11 |
| JPS49124911A (US08087162-20120103-C00010.png) | 1974-11-29 |
