ATE185034T1 - Verfahren zur echokompensation - Google Patents

Verfahren zur echokompensation

Info

Publication number
ATE185034T1
ATE185034T1 AT96402514T AT96402514T ATE185034T1 AT E185034 T1 ATE185034 T1 AT E185034T1 AT 96402514 T AT96402514 T AT 96402514T AT 96402514 T AT96402514 T AT 96402514T AT E185034 T1 ATE185034 T1 AT E185034T1
Authority
AT
Austria
Prior art keywords
transfer function
echo compensation
echo
simulate
updating
Prior art date
Application number
AT96402514T
Other languages
German (de)
English (en)
Inventor
Michael Maurer
Original Assignee
Cit Alcatel
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 Cit Alcatel filed Critical Cit Alcatel
Application granted granted Critical
Publication of ATE185034T1 publication Critical patent/ATE185034T1/de

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)
AT96402514T 1995-11-23 1996-11-22 Verfahren zur echokompensation ATE185034T1 (de)

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
ATE185034T1 true ATE185034T1 (de) 1999-10-15

Family

ID=7778213

Family Applications (1)

Application Number Title Priority Date Filing Date
AT96402514T ATE185034T1 (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

Family Cites Families (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8100650A (nl) * 1981-02-11 1982-09-01 Philips Nv Inrichting voor het corrigeren van pulsvervorming bij homochrone datatransmissie.
DE3120639C2 (de) * 1981-05-23 1986-10-23 ANT Nachrichtentechnik GmbH, 7150 Backnang Anordnung zur adaptiven Löschung von Sprecherechos
GB2123258A (en) * 1982-06-25 1984-01-25 Philips Electronic Associated Digital duplex communication system
GB2123259A (en) * 1982-06-25 1984-01-25 Philips Electronic Associated Digital duplex communication system
DE3431141A1 (de) * 1984-08-24 1986-03-06 Siemens Ag Transversalfilter-echokompensator fuer lange akustische echos
GB8719307D0 (en) * 1987-08-14 1987-09-23 Gen Electric Co Plc Echo canceller
DE3730234A1 (de) * 1987-09-09 1989-03-30 Telefonbau & Normalzeit Gmbh Verfahren zur echounterdrueckung
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.
US5146494A (en) * 1989-07-31 1992-09-08 At&T Bell Laboratories Overlapping look-up-and-add echo canceller requiring a smaller memory size
US4977591A (en) * 1989-11-17 1990-12-11 Nynex Corporation Dual mode LMS nonlinear data echo canceller
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

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
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
DE19543666A1 (de) 1997-05-28

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Legal Events

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