NL176731C - Digitale echo-onderdrukker. - Google Patents
Digitale echo-onderdrukker.Info
- Publication number
- NL176731C NL176731C NLAANVRAGE7200277,A NL7200277A NL176731C NL 176731 C NL176731 C NL 176731C NL 7200277 A NL7200277 A NL 7200277A NL 176731 C NL176731 C NL 176731C
- Authority
- NL
- Netherlands
- Prior art keywords
- echo suppressor
- digital echo
- digital
- suppressor
- echo
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F7/00—Methods or arrangements for processing data by operating upon the order or content of the data handled
- G06F7/02—Comparing digital values
- G06F7/026—Magnitude comparison, i.e. determining the relative order of operands based on their numerical value, e.g. window comparator
-
- 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)
- Theoretical Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- Mathematical Analysis (AREA)
- Pure & Applied Mathematics (AREA)
- Mathematical Optimization (AREA)
- General Engineering & Computer Science (AREA)
- Computational Mathematics (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Use Of Switch Circuits For Exchanges And Methods Of Control Of Multiplex Exchanges (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US105069A US3896273A (en) | 1971-01-08 | 1971-01-08 | Digital echo suppressor |
Publications (3)
Publication Number | Publication Date |
---|---|
NL7200277A NL7200277A (it) | 1972-07-11 |
NL176731B NL176731B (nl) | 1984-12-17 |
NL176731C true NL176731C (nl) | 1985-05-17 |
Family
ID=22303879
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NLAANVRAGE7200277,A NL176731C (nl) | 1971-01-08 | 1972-01-07 | Digitale echo-onderdrukker. |
Country Status (10)
Country | Link |
---|---|
US (1) | US3896273A (it) |
JP (1) | JPS5726015B1 (it) |
BE (1) | BE777659A (it) |
CA (1) | CA944879A (it) |
DE (1) | DE2200771C2 (it) |
FR (1) | FR2121656B1 (it) |
GB (1) | GB1371815A (it) |
IT (1) | IT948812B (it) |
NL (1) | NL176731C (it) |
SE (1) | SE374988B (it) |
Families Citing this family (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2457876C3 (de) * | 1973-12-10 | 1981-06-04 | Compagnie Industrielle des Télécommunications CIT-ALCATEL S.A., 75008 Paris | Echounterdrücker für ein Endgerät einer elektrischen Vierdrahtfernsprechleitung |
US4012603A (en) * | 1974-08-27 | 1977-03-15 | Nippon Electric Company, Ltd. | Echo suppressor having self-adaptive means |
US3942116A (en) * | 1975-03-13 | 1976-03-02 | California Microwave, Inc. | Transceiver having improved voice actuated carrier and echo suppression circuit |
US3973086A (en) * | 1975-04-24 | 1976-08-03 | Bell Telephone Laboratories, Incorporated | Digital echo suppressor break-in circuitry |
US3992594A (en) * | 1975-10-10 | 1976-11-16 | Bell Telephone Laboratories, Incorporated | Echo suppressor break-in circuitry |
US4029912A (en) * | 1975-12-10 | 1977-06-14 | Bell Telephone Laboratories, Incorporated | Common control digital echo suppressor |
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 |
US4123626A (en) * | 1977-11-23 | 1978-10-31 | Northern Telecom Limited | Digital echo attenuation circuit for a telephone system |
US4192979A (en) * | 1978-06-27 | 1980-03-11 | Communications Satellite Corporation | Apparatus for controlling echo in communication systems utilizing a voice-activated switch |
CA1130920A (en) * | 1979-03-05 | 1982-08-31 | William G. Crouse | Speech detector with variable threshold |
FR2451676A1 (fr) * | 1979-03-12 | 1980-10-10 | Soumagne Joel | Detecteur d'echo notamment pour systeme de communication a interpolation de parole |
CA1137240A (en) * | 1980-09-09 | 1982-12-07 | Northern Telecom Limited | Method of and apparatus for echo detection in voice channel signals |
US4549290A (en) * | 1983-06-10 | 1985-10-22 | Bell David B | Voice/data digital, duplex link |
DE3406407A1 (de) * | 1983-09-29 | 1985-04-11 | Siemens AG, 1000 Berlin und 8000 München | Schaltungsanordnung zur steuerung der uebertragungsfaehigkeit des empfangszweiges einer uebertragungseinrichtung |
US5022074A (en) * | 1985-07-01 | 1991-06-04 | Rockwell International Corporation | Digital echo suppressor |
JPH07123235B2 (ja) * | 1986-08-13 | 1995-12-25 | 株式会社日立製作所 | エコ−サプレツサ |
JPS63126861U (it) * | 1987-02-12 | 1988-08-18 |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1181123A (en) * | 1966-05-05 | 1970-02-11 | Sits Soc It Telecom Siemens | Improvements in and relating to Telephone Signal Transmission System |
US3562448A (en) * | 1968-06-21 | 1971-02-09 | Bell Telephone Labor Inc | Common control digital echo suppression |
US3560669A (en) * | 1969-02-25 | 1971-02-02 | Wescom | Echo suppressor |
-
1971
- 1971-01-08 US US105069A patent/US3896273A/en not_active Expired - Lifetime
-
1972
- 1972-01-04 BE BE777659A patent/BE777659A/xx not_active IP Right Cessation
- 1972-01-07 FR FR7200434A patent/FR2121656B1/fr not_active Expired
- 1972-01-07 NL NLAANVRAGE7200277,A patent/NL176731C/xx not_active IP Right Cessation
- 1972-01-07 IT IT67049/72A patent/IT948812B/it active
- 1972-01-07 DE DE2200771A patent/DE2200771C2/de not_active Expired
- 1972-01-07 CA CA131,922A patent/CA944879A/en not_active Expired
- 1972-01-08 JP JP445272A patent/JPS5726015B1/ja active Pending
- 1972-01-10 GB GB104672A patent/GB1371815A/en not_active Expired
- 1972-02-03 SE SE7200006*[A patent/SE374988B/xx unknown
Also Published As
Publication number | Publication date |
---|---|
GB1371815A (en) | 1974-10-30 |
BE777659A (fr) | 1972-05-02 |
DE2200771C2 (de) | 1986-01-30 |
CA944879A (en) | 1974-04-02 |
NL7200277A (it) | 1972-07-11 |
NL176731B (nl) | 1984-12-17 |
SE374988B (it) | 1975-03-24 |
DE2200771A1 (de) | 1972-07-20 |
JPS5726015B1 (it) | 1982-06-02 |
FR2121656B1 (it) | 1977-01-14 |
FR2121656A1 (it) | 1972-08-25 |
IT948812B (it) | 1973-06-11 |
US3896273A (en) | 1975-07-22 |
AU3731571A (en) | 1973-06-28 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
BB | A search report has been drawn up | ||
BC | A request for examination has been filed | ||
A85 | Still pending on 85-01-01 | ||
V1 | Lapsed because of non-payment of the annual fee |