IT8120998A1 - EQUIPMENT FOR ERASING ECHO SIGNALS FROM TRANSMITTED DIGITAL DATA - Google Patents

EQUIPMENT FOR ERASING ECHO SIGNALS FROM TRANSMITTED DIGITAL DATA

Info

Publication number: IT8120998A1
Authority: IT; Italy
Prior art keywords: erasing; equipment; digital data; echo signals; transmitted digital
Prior art date: 1980-04-09

Application number

IT1981A20998A

Other languages

Italian (it)

Other versions

IT8120998A0 (en

IT1137680B (en

Original Assignee

Western Electric Co Incorporated

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.)

1980-04-09

Filing date

1981-04-08

Publication date

1982-10-08

1981-04-08 Application filed by Western Electric Co Incorporated filed Critical Western Electric Co Incorporated

1981-04-08 Publication of IT8120998A0 publication Critical patent/IT8120998A0/en

1982-10-08 Publication of IT8120998A1 publication Critical patent/IT8120998A1/en

1986-09-10 Application granted granted Critical

1986-09-10 Publication of IT1137680B publication Critical patent/IT1137680B/en

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)

IT20998/81A 1980-04-09 1981-04-08 APPARATUS FOR DELETING ECHO SIGNALS FROM TRANSMITTED DIGITAL DATA IT1137680B (en)

Applications Claiming Priority (1)

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

Publications (3)

Publication Number	Publication Date
IT8120998A0 IT8120998A0 (en)	1981-04-08
IT8120998A1 true IT8120998A1 (en)	1982-10-08
IT1137680B IT1137680B (en)	1986-09-10

Family

ID=22483068

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
IT20998/81A IT1137680B (en)	1980-04-09	1981-04-08	APPARATUS FOR DELETING ECHO SIGNALS FROM TRANSMITTED DIGITAL DATA

Country Status (13)

Country	Link
JP (1)	JPS56157152A (en)
AU (1)	AU540883B2 (en)
CA (1)	CA1175521A (en)
CH (1)	CH651980A5 (en)
DE (1)	DE3113394C2 (en)
DK (1)	DK149681A (en)
ES (1)	ES8205088A1 (en)
FR (1)	FR2480534B1 (en)
GB (1)	GB2075313B (en)
IL (1)	IL62600A (en)
IT (1)	IT1137680B (en)
NL (1)	NL8101741A (en)
SE (1)	SE447437B (en)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
FR2534427A1 (en) *	1982-10-11	1984-04-13	Trt Telecom Radio Electr	ECHO CANCER FOR DATA SIGNAL IN BASE STRIP
US4894820A (en) *	1987-03-24	1990-01-16	Oki Electric Industry Co., Ltd.	Double-talk detection in an echo canceller
DE68924261T2 (en) *	1989-06-22	1996-03-21	Ibm	Echo cancellation device with adaptation of the echo cancellation coefficients during full duplex transmission.
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 TELEPHONE CONFERENCE DETECTION USING STEGANOGRAPHY
CN1914819B (en) *	2004-01-29	2010-08-11	Nxp股份有限公司	Echo Canceller Using Interference Level Control Step Size
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 (en) *	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/en not_active IP Right Cessation
- 1981-04-02 DK DK149681A patent/DK149681A/en not_active IP Right Cessation
- 1981-04-03 DE DE3113394A patent/DE3113394C2/en not_active Expired
- 1981-04-06 GB GB8110703A patent/GB2075313B/en not_active Expired
- 1981-04-07 FR FR8106951A patent/FR2480534B1/en not_active Expired
- 1981-04-07 IL IL62600A patent/IL62600A/en unknown
- 1981-04-08 NL NL8101741A patent/NL8101741A/en not_active Application Discontinuation
- 1981-04-08 IT IT20998/81A patent/IT1137680B/en active
- 1981-04-08 CH CH2375/81A patent/CH651980A5/en not_active IP Right Cessation
- 1981-04-08 ES ES501182A patent/ES8205088A1/en not_active Expired
- 1981-04-09 JP JP5377381A patent/JPS56157152A/en active Pending

Also Published As

Publication number	Publication date
SE8102048L (en)	1981-10-10
CH651980A5 (en)	1985-10-15
IL62600A0 (en)	1981-06-29
ES501182A0 (en)	1982-06-16
FR2480534A1 (en)	1981-10-16
JPS56157152A (en)	1981-12-04
DE3113394A1 (en)	1982-05-06
DE3113394C2 (en)	1985-11-21
CA1175521A (en)	1984-10-02
NL8101741A (en)	1981-11-02
FR2480534B1 (en)	1985-05-31
GB2075313B (en)	1984-05-02
SE447437B (en)	1986-11-10
IT8120998A0 (en)	1981-04-08
ES8205088A1 (en)	1982-06-16
DK149681A (en)	1981-10-10
AU540883B2 (en)	1984-12-06
IL62600A (en)	1983-11-30
IT1137680B (en)	1986-09-10
GB2075313A (en)	1981-11-11
AU6872281A (en)	1981-10-15

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