WO2006077005A3 - Dispositif d'annulation d'echo acoustique, procede et programme d'ordinateur correspondants - Google Patents

Dispositif d'annulation d'echo acoustique, procede et programme d'ordinateur correspondants Download PDF

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Publication number
WO2006077005A3
WO2006077005A3 PCT/EP2005/057220 EP2005057220W WO2006077005A3 WO 2006077005 A3 WO2006077005 A3 WO 2006077005A3 EP 2005057220 W EP2005057220 W EP 2005057220W WO 2006077005 A3 WO2006077005 A3 WO 2006077005A3
Authority
WO
WIPO (PCT)
Prior art keywords
signal
acoustic echo
filtering
computer program
echo cancellation
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.)
Ceased
Application number
PCT/EP2005/057220
Other languages
English (en)
Other versions
WO2006077005A2 (fr
Inventor
Claude Marro
Hela Daassi-Gnaba
Pascal Scalart
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.)
Orange SA
Original Assignee
France Telecom SA
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 France Telecom SA filed Critical France Telecom SA
Publication of WO2006077005A2 publication Critical patent/WO2006077005A2/fr
Publication of WO2006077005A3 publication Critical patent/WO2006077005A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Telephone Function (AREA)

Abstract

L'invention concerne un dispositif d'annulation d'un écho acoustique correspondant à un signal reçu (33), présent dans un signal émis source (34), comprenant des premiers moyens de soustraction (353) audit signal émis source (34) d'un signal d'écho estimé (352), obtenu par filtrage dudit signal reçu (33), délivrant un signal émis intermédiaire (36), et des premiers moyens de filtrage (39) dudit signal émis intermédiaire (36), dont les coefficients de filtrage sont déterminés par des moyens de calcul de coefficients. Selon l'invention, lesdits moyens de calcul comprennent des moyens de rehaussement, dans ledit signal émis source (34), d'au moins une composante spectrale représentative dudit écho, pour fournir un signal rehaussé, et des moyens de traitement dudit signal rehaussé, délivrant lesdits coefficients de filtrage.
PCT/EP2005/057220 2005-01-19 2005-12-29 Dispositif d'annulation d'echo acoustique, procede et programme d'ordinateur correspondants Ceased WO2006077005A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0500548 2005-01-19
FR0500548 2005-01-19

Publications (2)

Publication Number Publication Date
WO2006077005A2 WO2006077005A2 (fr) 2006-07-27
WO2006077005A3 true WO2006077005A3 (fr) 2006-11-02

Family

ID=34953672

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2005/057220 Ceased WO2006077005A2 (fr) 2005-01-19 2005-12-29 Dispositif d'annulation d'echo acoustique, procede et programme d'ordinateur correspondants

Country Status (1)

Country Link
WO (1) WO2006077005A2 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6108413A (en) * 1997-01-21 2000-08-22 Matra Communication Echo cancellation method and echo canceller implementing such a process
US6269161B1 (en) * 1999-05-20 2001-07-31 Signalworks, Inc. System and method for near-end talker detection by spectrum analysis

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6108413A (en) * 1997-01-21 2000-08-22 Matra Communication Echo cancellation method and echo canceller implementing such a process
US6269161B1 (en) * 1999-05-20 2001-07-31 Signalworks, Inc. System and method for near-end talker detection by spectrum analysis

Also Published As

Publication number Publication date
WO2006077005A2 (fr) 2006-07-27

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