JPS5433086B2 - - Google Patents
Info
- Publication number
- JPS5433086B2 JPS5433086B2 JP14123174A JP14123174A JPS5433086B2 JP S5433086 B2 JPS5433086 B2 JP S5433086B2 JP 14123174 A JP14123174 A JP 14123174A JP 14123174 A JP14123174 A JP 14123174A JP S5433086 B2 JPS5433086 B2 JP S5433086B2
- 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
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)
- Interconnected Communication Systems, Intercoms, And Interphones (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR7343928A FR2254159A1 (en) | 1973-12-10 | 1973-12-10 | Echo suppressor for terminal station - designed for four-wire telephone line with transmission cct. having controllable gate |
| FR7437705A FR2291653A2 (fr) | 1974-11-15 | 1974-11-15 | Demi-suppresseur d'echo pour un terminal d'une ligne electrique a quatre fils |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5092014A JPS5092014A (ja) | 1975-07-23 |
| JPS5433086B2 true JPS5433086B2 (ja) | 1979-10-18 |
Family
ID=26218070
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14123174A Expired JPS5433086B2 (ja) | 1973-12-10 | 1974-12-10 |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US3985979A (ja) |
| JP (1) | JPS5433086B2 (ja) |
| DE (1) | DE2457876C3 (ja) |
| GB (1) | GB1477413A (ja) |
| IT (1) | IT1030881B (ja) |
| NL (1) | NL7416090A (ja) |
| SE (1) | SE407319B (ja) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2363247A1 (fr) * | 1976-08-24 | 1978-03-24 | Cit Alcatel | Equipement terminal pour un systeme multiplex telephonique a courants porteurs |
| FR2404969A1 (fr) * | 1977-10-03 | 1979-04-27 | Cit Alcatel | Demi-suppresseur d'echo pour une ligne telephonique a quatre fils |
| US4165449A (en) * | 1978-01-03 | 1979-08-21 | Storage Technology Corporation | Echo suppressor circuit |
| US4192979A (en) * | 1978-06-27 | 1980-03-11 | Communications Satellite Corporation | Apparatus for controlling echo in communication systems utilizing a voice-activated switch |
| US4215252A (en) * | 1978-09-27 | 1980-07-29 | Communications Satellite Corporation | Video teleconference audio echo control unit |
| CA1137240A (en) * | 1980-09-09 | 1982-12-07 | Northern Telecom Limited | Method of and apparatus for echo detection in voice channel signals |
| GB2137055B (en) * | 1983-03-12 | 1986-11-12 | Marconi Avionics | Voice communication system |
| GB2139054B (en) * | 1983-04-22 | 1986-09-24 | Gen Electric Co Plc | Loudspeaking telephone instruments |
| ES2113320B1 (es) * | 1996-05-30 | 1999-01-16 | Alcatel Standard Electrica | Dispositivo supresor del eco. |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3280274A (en) * | 1963-10-30 | 1966-10-18 | Bell Telephone Labor Inc | Echo suppressor for communication systems having extended transmission delays |
| US3351720A (en) * | 1964-08-31 | 1967-11-07 | Bell Telephone Labor Inc | Echo suppressor for communication system having transmission delay |
| 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 | |
| US3673355A (en) * | 1970-09-02 | 1972-06-27 | Bell Telephone Labor Inc | Common control digital echo suppression |
| US3896273A (en) * | 1971-01-08 | 1975-07-22 | Communications Satellite Corp | Digital echo suppressor |
| US3823275A (en) * | 1972-08-10 | 1974-07-09 | Bell Telephone Labor Inc | Common control digital echo suppressor |
-
1974
- 1974-12-06 IT IT30250/74A patent/IT1030881B/it active
- 1974-12-06 DE DE2457876A patent/DE2457876C3/de not_active Expired
- 1974-12-09 GB GB5322574A patent/GB1477413A/en not_active Expired
- 1974-12-09 SE SE7415394A patent/SE407319B/xx not_active IP Right Cessation
- 1974-12-10 NL NL7416090A patent/NL7416090A/xx unknown
- 1974-12-10 US US05/531,405 patent/US3985979A/en not_active Expired - Lifetime
- 1974-12-10 JP JP14123174A patent/JPS5433086B2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| SE7415394L (ja) | 1975-06-11 |
| US3985979A (en) | 1976-10-12 |
| GB1477413A (en) | 1977-06-22 |
| JPS5092014A (ja) | 1975-07-23 |
| DE2457876A1 (de) | 1975-06-12 |
| IT1030881B (it) | 1979-04-10 |
| SE407319B (sv) | 1979-03-19 |
| DE2457876B2 (de) | 1980-08-14 |
| DE2457876C3 (de) | 1981-06-04 |
| NL7416090A (nl) | 1975-06-12 |