DE19543666A1 - Echokompensator - Google Patents

Echokompensator

Info

Publication number
DE19543666A1
DE19543666A1 DE19543666A DE19543666A DE19543666A1 DE 19543666 A1 DE19543666 A1 DE 19543666A1 DE 19543666 A DE19543666 A DE 19543666A DE 19543666 A DE19543666 A DE 19543666A DE 19543666 A1 DE19543666 A1 DE 19543666A1
Authority
DE
Germany
Prior art keywords
echo
block
transfer function
determined
echo canceller
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.)
Withdrawn
Application number
DE19543666A
Other languages
German (de)
English (en)
Inventor
Michael Dipl Ing Maurer
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.)
Alcatel Lucent Deutschland AG
Original Assignee
Alcatel SEL AG
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 Alcatel SEL AG filed Critical Alcatel SEL AG
Priority to DE19543666A priority Critical patent/DE19543666A1/de
Priority to AU70685/96A priority patent/AU719761B2/en
Priority to US08/748,340 priority patent/US5799078A/en
Priority to NZ299785A priority patent/NZ299785A/en
Priority to CA002191118A priority patent/CA2191118A1/en
Priority to DE59603143T priority patent/DE59603143D1/de
Priority to JP8311837A priority patent/JPH09275368A/ja
Priority to EP96402514A priority patent/EP0776118B1/de
Priority to AT96402514T priority patent/ATE185034T1/de
Priority to ES96402514T priority patent/ES2136958T3/es
Publication of DE19543666A1 publication Critical patent/DE19543666A1/de
Withdrawn legal-status Critical Current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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M9/00—Arrangements for interconnection not involving centralised switching
    • H04M9/08—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic
    • H04M9/082—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic using 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)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Interface Circuits In Exchanges (AREA)
DE19543666A 1995-11-23 1995-11-23 Echokompensator Withdrawn DE19543666A1 (de)

Priority Applications (10)

Application Number Priority Date Filing Date Title
DE19543666A DE19543666A1 (de) 1995-11-23 1995-11-23 Echokompensator
AU70685/96A AU719761B2 (en) 1995-11-23 1996-11-11 Echo cancellation method and circuit
US08/748,340 US5799078A (en) 1995-11-23 1996-11-13 Echo canceller
NZ299785A NZ299785A (en) 1995-11-23 1996-11-20 Echo canceller digital filter transfer function updating
CA002191118A CA2191118A1 (en) 1995-11-23 1996-11-22 Echo canceller
DE59603143T DE59603143D1 (de) 1995-11-23 1996-11-22 Verfahren zur Echokompensation
JP8311837A JPH09275368A (ja) 1995-11-23 1996-11-22 エコー消去装置
EP96402514A EP0776118B1 (de) 1995-11-23 1996-11-22 Verfahren zur Echokompensation
AT96402514T ATE185034T1 (de) 1995-11-23 1996-11-22 Verfahren zur echokompensation
ES96402514T ES2136958T3 (es) 1995-11-23 1996-11-22 Procedimiento de compensacion de eco.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19543666A DE19543666A1 (de) 1995-11-23 1995-11-23 Echokompensator

Publications (1)

Publication Number Publication Date
DE19543666A1 true DE19543666A1 (de) 1997-05-28

Family

ID=7778213

Family Applications (2)

Application Number Title Priority Date Filing Date
DE19543666A Withdrawn DE19543666A1 (de) 1995-11-23 1995-11-23 Echokompensator
DE59603143T Expired - Lifetime DE59603143D1 (de) 1995-11-23 1996-11-22 Verfahren zur Echokompensation

Family Applications After (1)

Application Number Title Priority Date Filing Date
DE59603143T Expired - Lifetime DE59603143D1 (de) 1995-11-23 1996-11-22 Verfahren zur Echokompensation

Country Status (9)

Country Link
US (1) US5799078A (cg-RX-API-DMAC10.html)
EP (1) EP0776118B1 (cg-RX-API-DMAC10.html)
JP (1) JPH09275368A (cg-RX-API-DMAC10.html)
AT (1) ATE185034T1 (cg-RX-API-DMAC10.html)
AU (1) AU719761B2 (cg-RX-API-DMAC10.html)
CA (1) CA2191118A1 (cg-RX-API-DMAC10.html)
DE (2) DE19543666A1 (cg-RX-API-DMAC10.html)
ES (1) ES2136958T3 (cg-RX-API-DMAC10.html)
NZ (1) NZ299785A (cg-RX-API-DMAC10.html)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19850271A1 (de) * 1998-10-31 2000-05-04 Alcatel Sa Verfahren zur Bestimmung eines Echokopplungsfaktors und der Echolaufzeit in einem bidirektionalen Telekommunikationssystem
US6754187B1 (en) 2000-04-06 2004-06-22 Inter-Tel, Inc. Performance enhancement system for digital PBX

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0057953A2 (en) * 1981-02-11 1982-08-18 Koninklijke Philips Electronics N.V. Arrangement for correcting pulse distortion in homochronous data transmission
DE3120639A1 (de) * 1981-05-23 1983-05-26 AEG-Telefunken Nachrichtentechnik GmbH, 7150 Backnang Anordnung zur adaptiven loeschung von sprecherechos
EP0098000A2 (en) * 1982-06-25 1984-01-11 Philips Electronics Uk Limited Digital duplex communication system
EP0098001A2 (en) * 1982-06-25 1984-01-11 Philips Electronics Uk Limited Digital duplex communication system
DE3431141A1 (de) * 1984-08-24 1986-03-06 Siemens Ag Transversalfilter-echokompensator fuer lange akustische echos
WO1989001723A1 (en) * 1987-08-14 1989-02-23 Gec Plessey Telecommunications Limited Echo canceller
DE3730234A1 (de) * 1987-09-09 1989-03-30 Telefonbau & Normalzeit Gmbh Verfahren zur echounterdrueckung
US4977591A (en) * 1989-11-17 1990-12-11 Nynex Corporation Dual mode LMS nonlinear data echo canceller
GB2234653A (en) * 1989-07-31 1991-02-06 American Telephone & Telegraph Overlapping look-up-and-add echo canceller reduces memory

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2225517B (en) * 1988-11-26 1993-03-31 Motorola Inc Telephone circuits
CA2004379C (en) * 1988-12-01 1993-07-06 Tetsu Taguchi Echo canceller with means for determining filter coefficients from autocorrelation and cross-correlation coefficients
ATE115794T1 (de) * 1989-05-12 1994-12-15 Plessey Semiconductors Ltd Schaltung zur audiosignalverarbeitung.
JPH03173229A (ja) * 1989-12-01 1991-07-26 Nec Corp 双方向通話状態検出方式
NL9002790A (nl) * 1990-12-18 1992-07-16 Philips Nv Echocompensator met verbeterde dubbelspraak detectie.
EP0530423B1 (en) * 1991-09-06 1996-12-11 International Business Machines Corporation Adaptive echo cancellation method and device for implementing said method
EP0582403B1 (en) * 1992-07-27 1997-12-10 Texaco Development Corporation Hydrotreating of cracked naptha
US5307405A (en) * 1992-09-25 1994-04-26 Qualcomm Incorporated Network echo canceller
JPH06216811A (ja) * 1993-01-20 1994-08-05 Toshiba Corp エコーキャンセラを備えた音声通信装置
DE4305256A1 (de) * 1993-02-20 1994-08-25 Sel Alcatel Ag Verfahren zum Verbessern der akustischen Rückhördämpfung von elektroakustischen Anlagen
FI935834A7 (fi) * 1993-12-23 1995-06-24 Nokia Corp Menetelmä kaikukohtaan sovittautumiseksi kaiunpoistajassa
JP3359460B2 (ja) * 1995-03-20 2002-12-24 沖電気工業株式会社 適応フィルタ及びエコーキャンセラ

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0057953A2 (en) * 1981-02-11 1982-08-18 Koninklijke Philips Electronics N.V. Arrangement for correcting pulse distortion in homochronous data transmission
DE3120639A1 (de) * 1981-05-23 1983-05-26 AEG-Telefunken Nachrichtentechnik GmbH, 7150 Backnang Anordnung zur adaptiven loeschung von sprecherechos
EP0098000A2 (en) * 1982-06-25 1984-01-11 Philips Electronics Uk Limited Digital duplex communication system
EP0098001A2 (en) * 1982-06-25 1984-01-11 Philips Electronics Uk Limited Digital duplex communication system
GB2123259A (en) * 1982-06-25 1984-01-25 Philips Electronic Associated Digital duplex communication system
US4570036A (en) * 1982-06-25 1986-02-11 U.S. Philips Corporation Digital duplex communication system
DE3431141A1 (de) * 1984-08-24 1986-03-06 Siemens Ag Transversalfilter-echokompensator fuer lange akustische echos
WO1989001723A1 (en) * 1987-08-14 1989-02-23 Gec Plessey Telecommunications Limited Echo canceller
DE3730234A1 (de) * 1987-09-09 1989-03-30 Telefonbau & Normalzeit Gmbh Verfahren zur echounterdrueckung
GB2234653A (en) * 1989-07-31 1991-02-06 American Telephone & Telegraph Overlapping look-up-and-add echo canceller reduces memory
FR2652463A1 (fr) * 1989-07-31 1991-03-29 American Telephone & Telegraph Annuleur d'echo a consultation de memoire et addition avec chevauchement, pour un emetteur-recepteur de symboles de donnees.
US4977591A (en) * 1989-11-17 1990-12-11 Nynex Corporation Dual mode LMS nonlinear data echo canceller

Also Published As

Publication number Publication date
EP0776118B1 (de) 1999-09-22
AU7068596A (en) 1997-05-29
JPH09275368A (ja) 1997-10-21
EP0776118A3 (cg-RX-API-DMAC10.html) 1997-06-25
ES2136958T3 (es) 1999-12-01
CA2191118A1 (en) 1997-05-24
ATE185034T1 (de) 1999-10-15
NZ299785A (en) 1998-07-28
EP0776118A2 (de) 1997-05-28
US5799078A (en) 1998-08-25
DE59603143D1 (de) 1999-10-28
AU719761B2 (en) 2000-05-18

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Legal Events

Date Code Title Description
OM8 Search report available as to paragraph 43 lit. 1 sentence 1 patent law
8139 Disposal/non-payment of the annual fee