ES461480A1 - Perfeccionamientos en eliminadores de eco conectados entre el trayecto de recepcion y el trayecto de transmision de unared hibrida. - Google Patents
Perfeccionamientos en eliminadores de eco conectados entre el trayecto de recepcion y el trayecto de transmision de unared hibrida.Info
- Publication number
- ES461480A1 ES461480A1 ES461480A ES461480A ES461480A1 ES 461480 A1 ES461480 A1 ES 461480A1 ES 461480 A ES461480 A ES 461480A ES 461480 A ES461480 A ES 461480A ES 461480 A1 ES461480 A1 ES 461480A1
- Authority
- ES
- Spain
- Prior art keywords
- signal processing
- network
- recursive
- echo
- processing network
- Prior art date
- 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
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/14—Two-way operation using the same type of signal, i.e. duplex
-
- 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)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Filters That Use Time-Delay Elements (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US05/712,518 US4057696A (en) | 1976-08-09 | 1976-08-09 | Recursive-like adaptive echo canceller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ES461480A1 true ES461480A1 (es) | 1978-06-01 |
Family
ID=24862458
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES461480A Expired ES461480A1 (es) | 1976-08-09 | 1977-08-09 | Perfeccionamientos en eliminadores de eco conectados entre el trayecto de recepcion y el trayecto de transmision de unared hibrida. |
Country Status (13)
Families Citing this family (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4129753A (en) * | 1977-12-09 | 1978-12-12 | Bell Telephone Laboratories, Incorporated | Echo canceller using feedback to improve speech detector performance |
| FR2412210A1 (fr) * | 1977-12-14 | 1979-07-13 | Cit Alcatel | Poste telephonique a haut-parleur |
| US4268727A (en) * | 1979-03-14 | 1981-05-19 | International Telephone And Telegraph Corporation | Adaptive digital echo cancellation circuit |
| US4381561A (en) * | 1980-10-23 | 1983-04-26 | International Telephone And Telegraph Corporation | All digital LSI line circuit for analog lines |
| US4351060A (en) * | 1980-10-23 | 1982-09-21 | International Telephone And Telegraph Corporation | Automatic, digitally synthesized matching line terminating impedance |
| JPS5797262A (en) * | 1980-12-09 | 1982-06-16 | Nippon Telegr & Teleph Corp <Ntt> | Loud speaker telephone set system |
| US4359778A (en) * | 1981-02-05 | 1982-11-16 | Zenith Radio Corporation | Channel equalizer and method for cancelling ghosts |
| SE8205841L (sv) * | 1981-10-23 | 1983-04-24 | Western Electric Co | Ekoeliminator |
| US4669115A (en) * | 1981-12-07 | 1987-05-26 | Regents Of The University Of California | Hybrid circuit and method |
| US4602133A (en) * | 1982-07-23 | 1986-07-22 | Gte Lenkurt Incorporated | Adaptive echo cancelling system and method utilizing linear code spacing |
| GB2144950A (en) * | 1983-08-10 | 1985-03-13 | Philips Electronic Associated | Data transmission system |
| US4677668A (en) * | 1984-05-01 | 1987-06-30 | North Carolina State University | Echo canceller using parametric methods |
| US4712235A (en) * | 1984-11-19 | 1987-12-08 | International Business Machines Corporation | Method and apparatus for improved control and time sharing of an echo canceller |
| US5042026A (en) * | 1987-03-03 | 1991-08-20 | Nec Corporation | Circuit for cancelling whole or part of a waveform using nonrecursive and recursive filters |
| US4982428A (en) * | 1988-12-29 | 1991-01-01 | At&T Bell Laboratories | Arrangement for canceling interference in transmission systems |
| WO1993005597A1 (en) * | 1991-08-30 | 1993-03-18 | Digital Sound Corporation | Adaptive echo canceller for voice messaging system |
| FR2729024A1 (fr) * | 1994-12-30 | 1996-07-05 | Matra Communication | Annuleur d'echo acoustique avec filtrage en sous-bandes |
| US7164659B2 (en) * | 1999-12-09 | 2007-01-16 | Broadcom Corporation | Adaptive gain control based on echo canceller performance information |
| US7480447B2 (en) * | 2004-03-26 | 2009-01-20 | Thomson Licensing | Pause time recovery and playback speed-up without loss of picture information |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3535473A (en) * | 1966-10-31 | 1970-10-20 | Bell Telephone Labor Inc | Self-adjusting echo canceller |
| US3732410A (en) * | 1969-12-22 | 1973-05-08 | Postmaster Department Res Labo | Self adaptive filter and control circuit therefor |
| US3597541A (en) * | 1969-12-23 | 1971-08-03 | Sylvania Electric Prod | Decision-directed adapted equalizer circuit |
| NL163926C (nl) * | 1970-03-12 | 1980-10-15 | Siemens Ag | Groep van echo-onderdrukkingsinrichtingen. |
| GB1434239A (en) * | 1972-08-10 | 1976-05-05 | Siemens Ag | Echo cancellers |
| JPS5226973B2 (US20110009641A1-20110113-C00116.png) * | 1973-01-19 | 1977-07-18 |
-
1976
- 1976-08-09 US US05/712,518 patent/US4057696A/en not_active Expired - Lifetime
-
1977
- 1977-07-19 CA CA283,026A patent/CA1082827A/en not_active Expired
- 1977-07-28 SE SE7708682A patent/SE423952B/xx not_active IP Right Cessation
- 1977-08-02 EG EG456/77A patent/EG13217A/xx active
- 1977-08-03 BE BE179876A patent/BE857442A/xx not_active IP Right Cessation
- 1977-08-03 DE DE19772734941 patent/DE2734941A1/de active Granted
- 1977-08-04 NL NL7708644A patent/NL7708644A/xx not_active Application Discontinuation
- 1977-08-04 IL IL52661A patent/IL52661A/xx unknown
- 1977-08-04 FR FR7724032A patent/FR2361781A1/fr active Granted
- 1977-08-08 IT IT26579/77A patent/IT1085648B/it active
- 1977-08-08 JP JP52094264A patent/JPS5842664B2/ja not_active Expired
- 1977-08-09 ES ES461480A patent/ES461480A1/es not_active Expired
- 1977-08-09 GB GB33318/77A patent/GB1560302A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB1560302A (en) | 1980-02-06 |
| JPS5320716A (en) | 1978-02-25 |
| IL52661A0 (en) | 1977-10-31 |
| CA1082827A (en) | 1980-07-29 |
| DE2734941A1 (de) | 1978-02-16 |
| IL52661A (en) | 1979-09-30 |
| AU2763477A (en) | 1979-02-08 |
| SE423952B (sv) | 1982-06-14 |
| BE857442A (fr) | 1977-12-01 |
| DE2734941C2 (US20110009641A1-20110113-C00116.png) | 1987-04-30 |
| NL7708644A (nl) | 1978-02-13 |
| US4057696A (en) | 1977-11-08 |
| SE7708682L (sv) | 1978-02-10 |
| JPS5842664B2 (ja) | 1983-09-21 |
| IT1085648B (it) | 1985-05-28 |
| FR2361781A1 (fr) | 1978-03-10 |
| EG13217A (en) | 1984-03-31 |
| FR2361781B1 (US20110009641A1-20110113-C00116.png) | 1981-07-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| ES461480A1 (es) | Perfeccionamientos en eliminadores de eco conectados entre el trayecto de recepcion y el trayecto de transmision de unared hibrida. | |
| ES462189A1 (es) | Perfeccionamientos en dispositivos de anulacion del eco parasistemas sincronos por baudios de transmision de informaciondigital. | |
| US3721777A (en) | Echo path delay simulator for use with adaptive echo cancellers | |
| US3499999A (en) | Closed loop adaptive echo canceller using generalized filter networks | |
| CA2004005A1 (en) | Echo canceller | |
| GB1203802A (en) | Improvements in or relating to echo suppressors | |
| ES417706A1 (es) | Perfeccionamientos en la construccion de compensadores de ecos para un sistema de transmision de mensajes. | |
| US3647992A (en) | Adaptive echo canceller for nonlinear systems | |
| US3754105A (en) | Circuit arrangement for echo suppression in a voice circuit on a four-wire transmission system upon transfer to a two-wire transmission line | |
| SE7708932L (sv) | Tvatradsoverdrag | |
| CA2088083A1 (en) | Method for selectively controlling the propagation of dual tone multi-frequency signals within a telecommunication network | |
| GB1516751A (en) | Speech and data networks including circuits arranged to automatically control transmission continuity testing of connections | |
| GB1027287A (en) | Echo suppressor systems | |
| JPS5733844A (en) | Echo cancelling device | |
| JPS53128206A (en) | Loop transmission system | |
| GB1033934A (en) | Signalling circuits including echo suppressors | |
| JPS561649A (en) | Conference telephone equipment | |
| CA1092734A (en) | Recursive-like adaptive echo canceller | |
| JPH02146827A (ja) | エコーキャンセラ | |
| GB1018941A (en) | Echo suppressors in transmission systems | |
| JPS5398706A (en) | Telephone circuit | |
| JPS53116013A (en) | Register sender trunk circuit | |
| JPS5570151A (en) | Control system for signal transmission/reception circuit | |
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| JPS5619235A (en) | Ringing suppressing system using digital filter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FD1A | Patent lapsed |
Effective date: 19990601 |