NL8101741A - Werkwijze en inrichting voor het onderdrukken van echo's bij datatransmissie over twee-draads telefoonkanalen. - Google Patents
Werkwijze en inrichting voor het onderdrukken van echo's bij datatransmissie over twee-draads telefoonkanalen. Download PDFInfo
- Publication number
- NL8101741A NL8101741A NL8101741A NL8101741A NL8101741A NL 8101741 A NL8101741 A NL 8101741A NL 8101741 A NL8101741 A NL 8101741A NL 8101741 A NL8101741 A NL 8101741A NL 8101741 A NL8101741 A NL 8101741A
- Authority
- NL
- Netherlands
- Prior art keywords
- signal
- echo
- signals
- data
- response
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims description 17
- 230000005540 biological transmission Effects 0.000 title description 27
- 230000000754 repressing effect Effects 0.000 title 1
- 230000004044 response Effects 0.000 claims description 18
- 230000003044 adaptive effect Effects 0.000 description 30
- 238000004891 communication Methods 0.000 description 23
- 230000006870 function Effects 0.000 description 11
- 230000008569 process Effects 0.000 description 8
- 238000005070 sampling Methods 0.000 description 8
- 230000000875 corresponding effect Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 7
- 230000006978 adaptation Effects 0.000 description 3
- 230000003321 amplification Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000002596 correlated effect Effects 0.000 description 2
- 238000002592 echocardiography Methods 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
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- 238000005859 coupling reaction Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
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- 238000001914 filtration Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
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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)
- Bidirectional Digital Transmission (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US13866380A | 1980-04-09 | 1980-04-09 | |
| US13866380 | 1980-04-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL8101741A true NL8101741A (nl) | 1981-11-02 |
Family
ID=22483068
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL8101741A NL8101741A (nl) | 1980-04-09 | 1981-04-08 | Werkwijze en inrichting voor het onderdrukken van echo's bij datatransmissie over twee-draads telefoonkanalen. |
Country Status (13)
| Country | Link |
|---|---|
| JP (1) | JPS56157152A (es) |
| AU (1) | AU540883B2 (es) |
| CA (1) | CA1175521A (es) |
| CH (1) | CH651980A5 (es) |
| DE (1) | DE3113394C2 (es) |
| DK (1) | DK149681A (es) |
| ES (1) | ES8205088A1 (es) |
| FR (1) | FR2480534B1 (es) |
| GB (1) | GB2075313B (es) |
| IL (1) | IL62600A (es) |
| IT (1) | IT1137680B (es) |
| NL (1) | NL8101741A (es) |
| SE (1) | SE447437B (es) |
Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2534427A1 (fr) * | 1982-10-11 | 1984-04-13 | Trt Telecom Radio Electr | Annuleur d'echo pour signal de donnees en bande de base |
| US4894820A (en) * | 1987-03-24 | 1990-01-16 | Oki Electric Industry Co., Ltd. | Double-talk detection in an echo canceller |
| DE68924261T2 (de) * | 1989-06-22 | 1996-03-21 | Ibm | Echokompensationseinrichtung mit Anpassung der Echokompensationskoeffizienten während der Vollduplexübertragung. |
| US6895086B2 (en) | 2001-11-13 | 2005-05-17 | Inmate Telephone, Inc. | 3-Way call detection system and method |
| EP1661371A4 (en) | 2003-08-05 | 2009-05-06 | Inmate Telephone Inc | THREE-WAY CONNECTION DETECTION BY USING STEGANOGRAPHY |
| CN1914819B (zh) * | 2004-01-29 | 2010-08-11 | Nxp股份有限公司 | 利用干扰电平控制步长的回声消除器 |
| US20080201158A1 (en) | 2007-02-15 | 2008-08-21 | Johnson Mark D | System and method for visitation management in a controlled-access environment |
| US8542802B2 (en) | 2007-02-15 | 2013-09-24 | Global Tel*Link Corporation | System and method for three-way call detection |
| US9225838B2 (en) | 2009-02-12 | 2015-12-29 | Value-Added Communications, Inc. | System and method for detecting three-way call circumvention attempts |
| US8630726B2 (en) | 2009-02-12 | 2014-01-14 | Value-Added Communications, Inc. | System and method for detecting three-way call circumvention attempts |
| US10572961B2 (en) | 2016-03-15 | 2020-02-25 | Global Tel*Link Corporation | Detection and prevention of inmate to inmate message relay |
| US9609121B1 (en) | 2016-04-07 | 2017-03-28 | Global Tel*Link Corporation | System and method for third party monitoring of voice and video calls |
| US10027797B1 (en) | 2017-05-10 | 2018-07-17 | Global Tel*Link Corporation | Alarm control for inmate call monitoring |
| US10225396B2 (en) | 2017-05-18 | 2019-03-05 | Global Tel*Link Corporation | Third party monitoring of a activity within a monitoring platform |
| US10860786B2 (en) | 2017-06-01 | 2020-12-08 | Global Tel*Link Corporation | System and method for analyzing and investigating communication data from a controlled environment |
| US9930088B1 (en) | 2017-06-22 | 2018-03-27 | Global Tel*Link Corporation | Utilizing VoIP codec negotiation during a controlled environment call |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3499999A (en) * | 1966-10-31 | 1970-03-10 | Bell Telephone Labor Inc | Closed loop adaptive echo canceller using generalized filter networks |
| US4087654A (en) * | 1975-11-28 | 1978-05-02 | Bell Telephone Laboratories, Incorporated | Echo canceller for two-wire full duplex data transmission |
| 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 |
| JPS5582551A (en) * | 1978-12-15 | 1980-06-21 | Nec Corp | Echo cancel unit for two line type duplex data communication modem |
-
1981
- 1981-03-17 CA CA000373185A patent/CA1175521A/en not_active Expired
- 1981-03-25 AU AU68722/81A patent/AU540883B2/en not_active Ceased
- 1981-03-31 SE SE8102048A patent/SE447437B/sv not_active IP Right Cessation
- 1981-04-02 DK DK149681A patent/DK149681A/da not_active IP Right Cessation
- 1981-04-03 DE DE3113394A patent/DE3113394C2/de not_active Expired
- 1981-04-06 GB GB8110703A patent/GB2075313B/en not_active Expired
- 1981-04-07 FR FR8106951A patent/FR2480534B1/fr not_active Expired
- 1981-04-07 IL IL62600A patent/IL62600A/xx unknown
- 1981-04-08 NL NL8101741A patent/NL8101741A/nl not_active Application Discontinuation
- 1981-04-08 IT IT20998/81A patent/IT1137680B/it active
- 1981-04-08 CH CH2375/81A patent/CH651980A5/de not_active IP Right Cessation
- 1981-04-08 ES ES501182A patent/ES8205088A1/es not_active Expired
- 1981-04-09 JP JP5377381A patent/JPS56157152A/ja active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| SE8102048L (sv) | 1981-10-10 |
| CH651980A5 (de) | 1985-10-15 |
| IL62600A0 (en) | 1981-06-29 |
| ES501182A0 (es) | 1982-06-16 |
| FR2480534A1 (fr) | 1981-10-16 |
| JPS56157152A (en) | 1981-12-04 |
| DE3113394A1 (de) | 1982-05-06 |
| DE3113394C2 (de) | 1985-11-21 |
| CA1175521A (en) | 1984-10-02 |
| FR2480534B1 (fr) | 1985-05-31 |
| GB2075313B (en) | 1984-05-02 |
| SE447437B (sv) | 1986-11-10 |
| IT8120998A0 (it) | 1981-04-08 |
| ES8205088A1 (es) | 1982-06-16 |
| DK149681A (da) | 1981-10-10 |
| AU540883B2 (en) | 1984-12-06 |
| IT8120998A1 (it) | 1982-10-08 |
| IL62600A (en) | 1983-11-30 |
| IT1137680B (it) | 1986-09-10 |
| GB2075313A (en) | 1981-11-11 |
| AU6872281A (en) | 1981-10-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| BA | A request for search or an international-type search has been filed | ||
| BB | A search report has been drawn up | ||
| A85 | Still pending on 85-01-01 | ||
| BV | The patent application has lapsed |