NL8105146A - Echo-elimineringssysteem. - Google Patents

Echo-elimineringssysteem. Download PDF

Info

Publication number
NL8105146A
NL8105146A NL8105146A NL8105146A NL8105146A NL 8105146 A NL8105146 A NL 8105146A NL 8105146 A NL8105146 A NL 8105146A NL 8105146 A NL8105146 A NL 8105146A NL 8105146 A NL8105146 A NL 8105146A
Authority
NL
Netherlands
Prior art keywords
circuit
output
signal
echo
circuits
Prior art date
Application number
NL8105146A
Other languages
English (en)
Dutch (nl)
Original Assignee
Nippon Telegraph & Telephone
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
Priority claimed from JP16011080A external-priority patent/JPS5784633A/ja
Priority claimed from JP16463581A external-priority patent/JPS5864830A/ja
Application filed by Nippon Telegraph & Telephone filed Critical Nippon Telegraph & Telephone
Publication of NL8105146A publication Critical patent/NL8105146A/nl

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
    • H04B3/237—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 using two adaptive filters, e.g. for near end and for end echo cancelling

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
NL8105146A 1980-11-15 1981-11-13 Echo-elimineringssysteem. NL8105146A (nl)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP16011080A JPS5784633A (en) 1980-11-15 1980-11-15 Echo eraser
JP16011080 1980-11-15
JP16463581A JPS5864830A (ja) 1981-10-15 1981-10-15 反響消去装置単位回路およびそれを用いた反響消去装置
JP16463581 1981-10-15

Publications (1)

Publication Number Publication Date
NL8105146A true NL8105146A (nl) 1982-06-01

Family

ID=26486702

Family Applications (1)

Application Number Title Priority Date Filing Date
NL8105146A NL8105146A (nl) 1980-11-15 1981-11-13 Echo-elimineringssysteem.

Country Status (6)

Country Link
US (1) US4480156A (cs)
CA (1) CA1180141A (cs)
DE (1) DE3145419A1 (cs)
FR (1) FR2495410B1 (cs)
GB (1) GB2090708B (cs)
NL (1) NL8105146A (cs)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS605634A (ja) * 1983-06-24 1985-01-12 Nec Corp エコ−キヤンセラ
US4629829A (en) * 1984-12-14 1986-12-16 Motorola, Inc. Full duplex speakerphone for radio and landline telephones
JPH0720070B2 (ja) * 1985-08-14 1995-03-06 株式会社日立製作所 デイジタル平衡回路を有するｐｃｍ符号復号器
US5471527A (en) 1993-12-02 1995-11-28 Dsc Communications Corporation Voice enhancement system and method
US6421443B1 (en) 1999-07-23 2002-07-16 Acoustic Technologies, Inc. Acoustic and electronic echo cancellation
US6278785B1 (en) 1999-09-21 2001-08-21 Acoustic Technologies, Inc. Echo cancelling process with improved phase control
US7015948B2 (en) * 2002-04-05 2006-03-21 Spx Corporation Method and apparatus for real time testing of DTV antenna transmitting systems in time domain under full power
US7760825B2 (en) * 2004-02-19 2010-07-20 Stmicroelectronics S.A. Device and method for suppressing pulse interferences in a signal
FR2997247B1 (fr) * 2012-10-22 2016-12-09 Commissariat Energie Atomique Generateur d'electricite et recuperateur d'energie

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3647992A (en) * 1970-03-05 1972-03-07 Bell Telephone Labor Inc Adaptive echo canceller for nonlinear systems
US3789165A (en) * 1972-04-24 1974-01-29 Communications Satellite Corp Echo canceller with variable threshold
GB1434239A (en) * 1972-08-10 1976-05-05 Siemens Ag Echo cancellers
DE2239452C3 (de) * 1972-08-10 1975-06-26 Siemens Ag, 1000 Berlin Und 8000 Muenchen Echokompensator für ein Nachrichtenübertragungssystem
AU514263B2 (en) * 1977-01-17 1981-01-29 T.R.T. Digital echo canceller

Also Published As

Publication number Publication date
US4480156A (en) 1984-10-30
FR2495410A1 (fr) 1982-06-04
DE3145419C2 (cs) 1991-06-27
GB2090708B (en) 1984-12-05
CA1180141A (en) 1984-12-27
GB2090708A (en) 1982-07-14
FR2495410B1 (fr) 1986-07-25
DE3145419A1 (de) 1982-06-09

Similar Documents

Publication Publication Date Title
CA1168776A (en) Automatic, digitally synthesized matching line terminating impedance
US4535206A (en) Echo cancellation in two-wire full-duplex data transmission with estimation of far-end data components
CA1081380A (en) Logarithmic echo canceller
US5084865A (en) Echo canceller having fir and iir filters for cancelling long tail echoes
US3499999A (en) Closed loop adaptive echo canceller using generalized filter networks
US4007341A (en) Echo cancelling device
US4527020A (en) Echo canceller for a long-distance telephone network
US3535473A (en) Self-adjusting echo canceller
US4587382A (en) Echo canceller using end delay measurement
US4381561A (en) All digital LSI line circuit for analog lines
GB2202717A (en) Double-talk detection in echo cancellers
EP0528436B1 (en) Jitter compensating device for echo canceller
NL8105146A (nl) Echo-elimineringssysteem.
CA2281320C (en) Method and apparatus of canceling echoes in multi-channel
US5940455A (en) Adaptive filter with disabling circuit for fast tap weight convergence
CA1082827A (en) Recursive-like adaptive echo canceller
NZ198653A (en) Digital recursive automatic equalizer
EP0240056A1 (en) Adaptive filter for producing and echo cancellation signal in a transceiver system for duplex digital communication through one single pair of conductors
CA1175521A (en) Echo cancellation in two-wire full-duplex data transmission with estimation of far-end data components
EP0605960B1 (en) A technique for reducing echoes in conference communications
KR870000629B1 (ko) 장거리 통신 시스템의 송수신기에 포함되는 유한 임펄스응답형 평형용 여파기
CA1158790A (en) Gain control apparatus for digital telephone line circuits
FI74561B (fi) Foerfarande att aostadkomma adaptiv ekoeliminering vid oeverfoering av digital information i duplex jaemte anordning foer utfoerande av foerfarandet
US4695998A (en) Method and circuit arrangement for the compensation of echo signals
CA1265594A (en) Echo cancellers for bidirectional digital transmission systems

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
BC A request for examination has been filed
A85 Still pending on 85-01-01
CNR Transfer of rights (patent application after its laying open for public inspection)

Free format text: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

BV The patent application has lapsed