LU72814A1 - - Google Patents
Info
- Publication number
- LU72814A1 LU72814A1 LU72814A LU72814A LU72814A1 LU 72814 A1 LU72814 A1 LU 72814A1 LU 72814 A LU72814 A LU 72814A LU 72814 A LU72814 A LU 72814A LU 72814 A1 LU72814 A1 LU 72814A1
- Authority
- LU
- Luxembourg
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)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR7423133A FR2277470A1 (fr) | 1974-07-03 | 1974-07-03 | Dispositif de centrage d'un filtre transversal d'un annuleur d'echo |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| LU72814A1 true LU72814A1 (xx) | 1976-04-13 |
Family
ID=9140828
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| LU72814A LU72814A1 (xx) | 1974-07-03 | 1975-06-25 |
Country Status (14)
| Country | Link |
|---|---|
| US (1) | US4024357A (xx) |
| JP (1) | JPS5130412A (xx) |
| BE (1) | BE830261A (xx) |
| BR (1) | BR7504210A (xx) |
| DE (1) | DE2528810A1 (xx) |
| DK (1) | DK300175A (xx) |
| FR (1) | FR2277470A1 (xx) |
| GB (1) | GB1519295A (xx) |
| IE (1) | IE41263B1 (xx) |
| IT (1) | IT1039551B (xx) |
| LU (1) | LU72814A1 (xx) |
| NL (1) | NL7507903A (xx) |
| PL (1) | PL104150B1 (xx) |
| SE (1) | SE400869B (xx) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2412210A1 (fr) * | 1977-12-14 | 1979-07-13 | Cit Alcatel | Poste telephonique a haut-parleur |
| DE2853167C2 (de) * | 1978-12-08 | 1980-10-30 | Siemens Ag, 1000 Berlin Und 8000 Muenchen | Teilnehmerschaltung |
| DE3173306D1 (en) * | 1981-09-08 | 1986-02-06 | Ibm | Data receiving apparatus with listener echo canceller |
| 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 |
| SE426765B (sv) * | 1981-11-02 | 1983-02-07 | Ellemtel Utvecklings Ab | Balansfilter av fir-typ ingaende i sendar-mottagarenheten i ett telekommunikationssystem |
| US4582963A (en) * | 1982-07-29 | 1986-04-15 | Rockwell International Corporation | Echo cancelling using adaptive bulk delay and filter |
| US4587382A (en) * | 1982-07-29 | 1986-05-06 | Gte Lenkurt Incorporated | Echo canceller using end delay measurement |
| 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 |
| DE3585034D1 (de) * | 1985-10-30 | 1992-02-06 | Ibm | Verfahren zur bestimmung einer flachen echopfadverzoegerung und dieses verfahren verwendender echokompensator. |
| US4805215A (en) * | 1986-10-01 | 1989-02-14 | Racal Data Communications Inc. | Adaptive echo canceller with sparse dynamically positioned taps |
| US4823382A (en) * | 1986-10-01 | 1989-04-18 | Racal Data Communications Inc. | Echo canceller with dynamically positioned adaptive filter taps |
| US7164659B2 (en) * | 1999-12-09 | 2007-01-16 | Broadcom Corporation | Adaptive gain control based on echo canceller performance information |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3732410A (en) * | 1969-12-22 | 1973-05-08 | Postmaster Department Res Labo | Self adaptive filter and control circuit therefor |
| 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 |
| US3721777A (en) * | 1971-11-26 | 1973-03-20 | Bell Telephone Labor Inc | Echo path delay simulator for use with adaptive echo cancellers |
| GB1434239A (en) * | 1972-08-10 | 1976-05-05 | Siemens Ag | Echo cancellers |
-
1974
- 1974-07-03 FR FR7423133A patent/FR2277470A1/fr active Granted
-
1975
- 1975-06-16 BE BE1006729A patent/BE830261A/xx not_active IP Right Cessation
- 1975-06-25 LU LU72814A patent/LU72814A1/xx unknown
- 1975-06-27 DE DE19752528810 patent/DE2528810A1/de not_active Withdrawn
- 1975-06-27 US US05/591,078 patent/US4024357A/en not_active Expired - Lifetime
- 1975-06-30 IT IT24934/75A patent/IT1039551B/it active
- 1975-07-01 PL PL1975181714A patent/PL104150B1/pl unknown
- 1975-07-02 DK DK300175A patent/DK300175A/da unknown
- 1975-07-02 NL NL7507903A patent/NL7507903A/xx not_active Application Discontinuation
- 1975-07-02 SE SE7507604A patent/SE400869B/xx unknown
- 1975-07-02 GB GB27818/75A patent/GB1519295A/en not_active Expired
- 1975-07-02 IE IE1464/75A patent/IE41263B1/xx unknown
- 1975-07-03 JP JP50081493A patent/JPS5130412A/ja active Pending
- 1975-07-03 BR BR5389/75D patent/BR7504210A/pt unknown
Also Published As
| Publication number | Publication date |
|---|---|
| IT1039551B (it) | 1979-12-10 |
| GB1519295A (en) | 1978-07-26 |
| FR2277470A1 (fr) | 1976-01-30 |
| FR2277470B1 (xx) | 1978-03-24 |
| BR7504210A (pt) | 1976-07-06 |
| IE41263B1 (en) | 1979-11-21 |
| US4024357A (en) | 1977-05-17 |
| BE830261A (xx) | 1975-12-16 |
| PL104150B1 (pl) | 1979-08-31 |
| SE7507604L (sv) | 1976-01-05 |
| IE41263L (en) | 1976-01-03 |
| DK300175A (da) | 1976-01-04 |
| DE2528810A1 (de) | 1976-01-22 |
| SE400869B (sv) | 1978-04-10 |
| NL7507903A (nl) | 1976-01-06 |
| JPS5130412A (en) | 1976-03-15 |