DE69216384T2 - Verfahren zur nichtlinearen signalverarbeitung in einem echokompensator - Google Patents

Verfahren zur nichtlinearen signalverarbeitung in einem echokompensator

Info

Publication number
DE69216384T2
DE69216384T2 DE69216384T DE69216384T DE69216384T2 DE 69216384 T2 DE69216384 T2 DE 69216384T2 DE 69216384 T DE69216384 T DE 69216384T DE 69216384 T DE69216384 T DE 69216384T DE 69216384 T2 DE69216384 T2 DE 69216384T2
Authority
DE
Germany
Prior art keywords
level
pct
near end
echo canceller
signal processing
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 - Lifetime
Application number
DE69216384T
Other languages
English (en)
Other versions
DE69216384D1 (de
Inventor
Heimo Laehdemaeki
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.)
Nokia Oyj
Original Assignee
Nokia Telecommunications Oy
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 Nokia Telecommunications Oy filed Critical Nokia Telecommunications Oy
Application granted granted Critical
Publication of DE69216384D1 publication Critical patent/DE69216384D1/de
Publication of DE69216384T2 publication Critical patent/DE69216384T2/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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)
  • Apparatus For Radiation Diagnosis (AREA)
  • Magnetic Record Carriers (AREA)
  • Surgical Instruments (AREA)
  • Nitrogen Condensed Heterocyclic Rings (AREA)
  • Heterocyclic Carbon Compounds Containing A Hetero Ring Having Nitrogen And Oxygen As The Only Ring Hetero Atoms (AREA)
  • Filters That Use Time-Delay Elements (AREA)
  • Nitrogen And Oxygen Or Sulfur-Condensed Heterocyclic Ring Systems (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Measurement Of Current Or Voltage (AREA)
DE69216384T 1991-11-04 1992-10-28 Verfahren zur nichtlinearen signalverarbeitung in einem echokompensator Expired - Lifetime DE69216384T2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI915200A FI89756C (fi) 1991-11-04 1991-11-04 Foerfarande foer olineaer signalbehandling i en ekoslaeckare
PCT/FI1992/000287 WO1993009609A1 (en) 1991-11-04 1992-10-28 A method for non-linear signal processing in an echo canceller

Publications (2)

Publication Number Publication Date
DE69216384D1 DE69216384D1 (de) 1997-02-13
DE69216384T2 true DE69216384T2 (de) 1997-06-12

Family

ID=8533426

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69216384T Expired - Lifetime DE69216384T2 (de) 1991-11-04 1992-10-28 Verfahren zur nichtlinearen signalverarbeitung in einem echokompensator

Country Status (10)

Country Link
US (1) US5396488A (de)
EP (1) EP0565682B1 (de)
JP (1) JP3408254B2 (de)
AT (1) ATE147211T1 (de)
AU (1) AU653655B2 (de)
DE (1) DE69216384T2 (de)
FI (1) FI89756C (de)
HK (1) HK1007364A1 (de)
NO (1) NO304867B1 (de)
WO (1) WO1993009609A1 (de)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19639702C2 (de) * 1996-09-26 2000-11-16 Siemens Ag Verfahren und Anordnung zur Begrenzung des Restechos
KR100239361B1 (ko) * 1997-06-25 2000-01-15 구자홍 음향반향 제어시스템 및 그의 동시통화 제어방법
US5857167A (en) * 1997-07-10 1999-01-05 Coherant Communications Systems Corp. Combined speech coder and echo canceler
GB2330745B (en) * 1997-10-24 2002-08-21 Mitel Corp Nonlinear processor for acoustic echo canceller
US6658107B1 (en) 1998-10-23 2003-12-02 Telefonaktiebolaget Lm Ericsson (Publ) Methods and apparatus for providing echo suppression using frequency domain nonlinear processing
US7423983B1 (en) * 1999-09-20 2008-09-09 Broadcom Corporation Voice and data exchange over a packet based network
US7924752B2 (en) 1999-09-20 2011-04-12 Broadcom Corporation Voice and data exchange over a packet based network with AGC
US6606382B2 (en) * 2000-01-27 2003-08-12 Qualcomm Incorporated System and method for implementation of an echo canceller

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3894200A (en) * 1973-10-10 1975-07-08 Communications Satellite Corp Adaptive echo canceller with digital center clipping
FR2404969A1 (fr) * 1977-10-03 1979-04-27 Cit Alcatel Demi-suppresseur d'echo pour une ligne telephonique a quatre fils
JPS6050092B2 (ja) * 1977-11-08 1985-11-06 ケイディディ株式会社 適応制御型反響阻止装置
DE3027053A1 (de) * 1980-07-17 1982-02-11 Robert Bosch Gmbh, 7000 Stuttgart Verfahren zur zeitlichen korrektur von digitalen schaltsignalen
AU537603B2 (en) * 1980-11-24 1984-07-05 Communications Satellite Corporation Echo canceller with improved double talk detection
US4645883A (en) * 1984-05-09 1987-02-24 Communications Satellite Corporation Double talk and line noise detector for a echo canceller
US4979163A (en) * 1988-12-28 1990-12-18 At&T Bell Laboratories Echo suppression arrangement for an adaptive speakerphone
JP2518433B2 (ja) * 1990-01-24 1996-07-24 日本電気株式会社 ダブルト―ク検出回路
DE4009730A1 (de) * 1990-03-27 1991-10-02 Philips Patentverwaltung Schaltungsanordnung zur versteilerung von signalflanken
GB2245459A (en) * 1990-06-20 1992-01-02 Motorola Inc Echo canceller with adaptive voice switch attenuation
US5157653A (en) * 1990-08-03 1992-10-20 Coherent Communications Systems Corp. Residual echo elimination with proportionate noise injection
US5075687A (en) * 1990-09-27 1991-12-24 Advanced Micro Devices, Inc. Echo suppression with both digital and analog variable attenuators
US5274705A (en) * 1991-09-24 1993-12-28 Tellabs Inc. Nonlinear processor for an echo canceller and method

Also Published As

Publication number Publication date
HK1007364A1 (en) 1999-04-09
WO1993009609A1 (en) 1993-05-13
FI89756B (fi) 1993-07-30
NO304867B1 (no) 1999-02-22
EP0565682B1 (de) 1997-01-02
EP0565682A1 (de) 1993-10-20
JP3408254B2 (ja) 2003-05-19
ATE147211T1 (de) 1997-01-15
FI915200A0 (fi) 1991-11-04
US5396488A (en) 1995-03-07
FI915200A (fi) 1993-05-05
AU2873492A (en) 1993-06-07
NO932190L (no) 1993-09-03
JPH06503699A (ja) 1994-04-21
DE69216384D1 (de) 1997-02-13
NO932190D0 (no) 1993-06-14
AU653655B2 (en) 1994-10-06
FI89756C (fi) 1993-11-10

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition