DE3586696D1 - Pcm-coder/decoder mit zweidraht/vierdrahtumwandlung. - Google Patents
Pcm-coder/decoder mit zweidraht/vierdrahtumwandlung.Info
- Publication number
- DE3586696D1 DE3586696D1 DE8585106606T DE3586696T DE3586696D1 DE 3586696 D1 DE3586696 D1 DE 3586696D1 DE 8585106606 T DE8585106606 T DE 8585106606T DE 3586696 T DE3586696 T DE 3586696T DE 3586696 D1 DE3586696 D1 DE 3586696D1
- Authority
- DE
- Germany
- Prior art keywords
- wire
- decoder
- conversion
- pcm coder
- coder
- 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 - Lifetime
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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
- H04B1/54—Circuits using the same frequency for two directions of communication
- H04B1/58—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa
- H04B1/586—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa using an electronic circuit
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Analogue/Digital Conversion (AREA)
- Interface Circuits In Exchanges (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10835484A JPS60253330A (ja) | 1984-05-30 | 1984-05-30 | 2線4線変換機能を持つpcm符号復号器 |
JP59131048A JPH0746785B2 (ja) | 1984-06-27 | 1984-06-27 | Pcm符号復号器 |
Publications (2)
Publication Number | Publication Date |
---|---|
DE3586696D1 true DE3586696D1 (de) | 1992-11-05 |
DE3586696T2 DE3586696T2 (de) | 1993-04-01 |
Family
ID=26448262
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE8585106606T Expired - Fee Related DE3586696T2 (de) | 1984-05-30 | 1985-05-29 | Pcm-coder/decoder mit zweidraht/vierdrahtumwandlung. |
Country Status (3)
Country | Link |
---|---|
US (1) | US4796296A (de) |
EP (1) | EP0163298B1 (de) |
DE (1) | DE3586696T2 (de) |
Families Citing this family (23)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB8528843D0 (en) * | 1985-11-22 | 1985-12-24 | British Telecomm | Codec |
SE457923B (sv) * | 1987-06-15 | 1989-02-06 | Ellemtel Utvecklings Ab | Anordning foer att aastadkomma en styrbar linjeavslutningsimpedans |
GB8719307D0 (en) * | 1987-08-14 | 1987-09-23 | Gen Electric Co Plc | Echo canceller |
JPH0773238B2 (ja) * | 1989-04-18 | 1995-08-02 | 日本電気株式会社 | 2線4線変換回路 |
EP0448754B1 (de) * | 1990-03-27 | 1993-11-03 | Siemens Aktiengesellschaft | Zweidraht-Vierdraht-Umsetzer |
EP0448753B1 (de) * | 1990-03-27 | 1993-11-03 | Siemens Aktiengesellschaft | Zweidraht-Vierdraht-Umsetzer |
DE59108519D1 (de) * | 1990-07-19 | 1997-03-13 | Siemens Ag | Teilnehmeranschlussschaltung zum Anschluss einer Teilnehmeranschlussleitung für die Übertragung von analogen Teilnehmersignalen an die Vermittlungsstelle einer digitalen Zeitmultiplex-Fernsprechvermittlungsstelle |
DE69221949T2 (de) * | 1991-06-13 | 1998-04-02 | Nippon Electric Co | Verfahren und Einrichtung zur Echokompensation in einem digitalen Fernmeldesystem |
KR940004432B1 (ko) * | 1991-10-02 | 1994-05-25 | 삼성전자 주식회사 | 전자교환기의 PCM CODEC(DOCER and DECODER) 집적회로 |
US5245654A (en) * | 1991-10-10 | 1993-09-14 | Cermetek Microelectronics, Inc. | Solid state isolation device using opto-isolators |
EP0642229B1 (de) * | 1993-09-02 | 1999-11-24 | Siemens Aktiengesellschaft | Schaltungsanordnung zur Erzeugung einer variablen Leitungsabschlussimpedanz |
DE4426226A1 (de) * | 1994-07-23 | 1996-01-25 | Philips Patentverwaltung | Schaltungsanordnung zum Übertragen von codierten Sprachsignalen |
JPH09223990A (ja) * | 1996-02-19 | 1997-08-26 | Fujitsu Ltd | 伝送装置 |
DE19611941C1 (de) * | 1996-03-26 | 1997-12-11 | Siemens Ag | Schaltungsanordnung zur Leitungsanpassung und Echounterdrückung |
KR100222413B1 (ko) | 1997-03-14 | 1999-10-01 | 윤종용 | 아나로그 교환기와 디지털 교환기를 정합하기 위한 시그널링 정합장치 |
US6947478B1 (en) | 1999-02-05 | 2005-09-20 | Infineon Technologies Ag | Analogue echo filter |
US6643271B1 (en) * | 1999-04-30 | 2003-11-04 | 3Com Corporation | Adjustable gain transmit cancellation in a full-duplex modem data access arrangement (DAA) |
US6754187B1 (en) | 2000-04-06 | 2004-06-22 | Inter-Tel, Inc. | Performance enhancement system for digital PBX |
JP3955488B2 (ja) * | 2002-03-19 | 2007-08-08 | 富士通株式会社 | 信号処理装置 |
US7062037B2 (en) * | 2002-04-30 | 2006-06-13 | Texas Instruments Incorporated | Generic line impedance matching circuit using decomposed configurable transfer functions |
DE10247208A1 (de) * | 2002-10-10 | 2004-04-22 | Infineon Technologies Ag | Brückenschaltung zur Echounterdrückung in Kommunikationseinrichtungen |
CN101622667B (zh) * | 2007-03-02 | 2012-08-15 | 艾利森电话股份有限公司 | 用于分层编解码器的后置滤波器 |
DE102007056732B4 (de) * | 2007-11-26 | 2012-10-25 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Vorrichtung und Verfahren zur effizienten Analog-zu-Digital-Wandlung |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2160308B1 (de) * | 1971-11-19 | 1977-01-28 | Labo Cent Telecommunicat | |
DE2607480C2 (de) * | 1976-02-20 | 1982-11-25 | Deutsche Telephonwerke Und Kabelindustrie Ag, 1000 Berlin | Schaltungsanordnung für eine Gabel |
JPS54136253A (en) * | 1978-04-14 | 1979-10-23 | Nec Corp | Adaptive type electronic hybrid circuit |
FR2437116A1 (fr) * | 1978-09-19 | 1980-04-18 | Thomson Ericsson Telephones So | Dispositif de separation et d'equilibrage pour autocommutateurs telephoniques |
US4270027A (en) * | 1979-11-28 | 1981-05-26 | International Telephone And Telegraph Corporation | Telephone subscriber line unit with sigma-delta digital to analog converter |
GB2071461B (en) * | 1980-02-14 | 1984-01-25 | Standard Telephones Cables Ltd | Telephone line feed |
FR2485842B1 (fr) * | 1980-06-30 | 1988-02-26 | Cit Alcatel | Dispositif de separation des voies emission et reception d'une transmission de donnees en duplex integral |
JPS5737937A (en) * | 1980-08-15 | 1982-03-02 | Hitachi Ltd | Automatic hybrid circuit |
JPS6046899B2 (ja) * | 1980-09-26 | 1985-10-18 | 日本電気株式会社 | 反響消去装置 |
FR2496364A1 (fr) * | 1980-12-17 | 1982-06-18 | Trt Telecom Radio Electr | Annuleur d'echo pour transmission telephonique par voies numeriques mettant en oeuvre une loi de codage pseudo-logarithmique |
CA1154185A (en) * | 1981-01-23 | 1983-09-20 | Patrick R. Beirne | Subscriber line interface circuit |
JPS583430A (ja) * | 1981-06-30 | 1983-01-10 | Nec Corp | まわり込信号抑圧装置 |
JPS5895488A (ja) * | 1981-12-02 | 1983-06-07 | Hitachi Ltd | ライン回路 |
JPS59225626A (ja) * | 1983-06-06 | 1984-12-18 | Nippon Telegr & Teleph Corp <Ntt> | デ−タ伝送装置用エコ−キヤンセラ装置 |
US4628157A (en) * | 1984-09-07 | 1986-12-09 | At&T Bell Laboratories | Bidirectional adaptive voice frequency repeater |
-
1985
- 1985-05-29 DE DE8585106606T patent/DE3586696T2/de not_active Expired - Fee Related
- 1985-05-29 EP EP85106606A patent/EP0163298B1/de not_active Expired
- 1985-05-30 US US07/739,295 patent/US4796296A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE3586696T2 (de) | 1993-04-01 |
EP0163298A3 (en) | 1988-08-24 |
US4796296A (en) | 1989-01-03 |
EP0163298A2 (de) | 1985-12-04 |
EP0163298B1 (de) | 1992-09-30 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8364 | No opposition during term of opposition | ||
8339 | Ceased/non-payment of the annual fee |