[go: up one dir, main page]

ES8205088A1 - Procedimiento y aparato para el tratamiento de muestras de una senal entrante. - Google Patents

Procedimiento y aparato para el tratamiento de muestras de una senal entrante.

Info

Publication number
ES8205088A1
ES8205088A1 ES501182A ES501182A ES8205088A1 ES 8205088 A1 ES8205088 A1 ES 8205088A1 ES 501182 A ES501182 A ES 501182A ES 501182 A ES501182 A ES 501182A ES 8205088 A1 ES8205088 A1 ES 8205088A1
Authority
ES
Spain
Prior art keywords
echo
signal
component
response
compensated signal
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
Application number
ES501182A
Other languages
English (en)
Other versions
ES501182A0 (es
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AT&T Corp
Original Assignee
Western Electric Co Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Western Electric Co Inc filed Critical Western Electric Co Inc
Publication of ES501182A0 publication Critical patent/ES501182A0/es
Publication of ES8205088A1 publication Critical patent/ES8205088A1/es
Expired legal-status Critical Current

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

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)

Abstract

PROCEDIMIENTO Y DISPOSITIVO PARA LA CANCELACION DE SEÑALES DE ECO DE DATOS DIGITALES EN CANALES DE TRANSMISION TELEFONICA. MEDIANTE UN GENERADOR (80) SE OBTIENE UNA SEÑAL DE ERROR DE ADAPTACION QUE ALIMENTA UN CIRCUITO CANCELADOR DE ECO (24), EL CUAL GENERA UNA REPLICA (ZM) DE CADA COMPONENTE DE ECO. EN UN CIRCUITO COMBINADOR (22) SE COMBINAN LA REPLICA GENERADA (ZM) Y LA SEÑAL DE MUESTRA (RM) PARA CONSEGUIR UNA SEÑAL COMPENSADA EN ECO (SM). ESTA SE INTRODUCE EN UN FILTRO DE PASO BAJO (30), A CONTINUACION EN UN RECEPTOR (34) Y POR ULTIMO ALIMENTA UN ENLACE DE DATOS (36).
ES501182A 1980-04-09 1981-04-08 Procedimiento y aparato para el tratamiento de muestras de una senal entrante. Expired ES8205088A1 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US13866380A 1980-04-09 1980-04-09

Publications (2)

Publication Number Publication Date
ES501182A0 ES501182A0 (es) 1982-06-16
ES8205088A1 true ES8205088A1 (es) 1982-06-16

Family

ID=22483068

Family Applications (1)

Application Number Title Priority Date Filing Date
ES501182A Expired ES8205088A1 (es) 1980-04-09 1981-04-08 Procedimiento y aparato para el tratamiento de muestras de una senal entrante.

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

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
NL8101741A (nl) 1981-11-02
FR2480534B1 (fr) 1985-05-31
GB2075313B (en) 1984-05-02
SE447437B (sv) 1986-11-10
IT8120998A0 (it) 1981-04-08
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

Similar Documents

Publication Publication Date Title
US4751730A (en) Process and system for improving echo cancellation within a transmission network
ES8205088A1 (es) Procedimiento y aparato para el tratamiento de muestras de una senal entrante.
US4087654A (en) Echo canceller for two-wire full duplex data transmission
ES462189A1 (es) Perfeccionamientos en dispositivos de anulacion del eco parasistemas sincronos por baudios de transmision de informaciondigital.
ES8402128A1 (es) Una estacion de transmision digital.
US4535206A (en) Echo cancellation in two-wire full-duplex data transmission with estimation of far-end data components
Ochiai et al. Echo canceler with two echo path models
Sondhi et al. Silencing echoes on the telephone network
US3894200A (en) Adaptive echo canceller with digital center clipping
US3535473A (en) Self-adjusting echo canceller
US4587382A (en) Echo canceller using end delay measurement
KR960702965A (ko) 반향소거장치 및 반향경로 추정방법
KR960027855A (ko) 데이타 통신 장치 및 그 장치에 이용하기 위한 방법
EP0116968B1 (en) Adaptive echo canceller
ES8503916A1 (es) Un metodo y un circuito para localizar fallos en un terminal de abonado para telecomunicacion digital
EP0133728A2 (en) Data transmission system
US4021623A (en) Automatic H-register clear for prevention of erroneous convolution in digital adaptive echo canceller
GR3029267T3 (en) Terminal for data transmission over an analogous bidirectional line with echo cancellation coupled to the reception clock
Duttweiler Communications: Bell's echo-killer chip: Annoying echoes in two-way conversations via satellite are eliminated by using an inexpensive silicon circuit
WO1998039849A3 (en) Echo cancellation system and method for multipoint networks
JPS61199338A (ja) エコ−キヤンセラトレ−ニング方式
JPS5834977B2 (ja) ２ セン −４ センヘンカンカイロ
CA1066826A (en) Automatic h-register clear for prevention of erroneous convolution in digital adaptive echo canceller
SU832735A2 (ru) Эхозаградитель гармоническогоОРТОгОНАльНОгО ВОКОдЕРА
Hua et al. The application of adaptive echo cancellation technique in analog full-duplex speech scrambling systems