CA2414636A1 - Methode de captage d'information sur trajet d'echo constant dans un telephone mains-libres fonctionnant en duplex integral - Google Patents

Methode de captage d'information sur trajet d'echo constant dans un telephone mains-libres fonctionnant en duplex integral Download PDF

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Publication number
CA2414636A1
CA2414636A1 CA 2414636 CA2414636A CA2414636A1 CA 2414636 A1 CA2414636 A1 CA 2414636A1 CA 2414636 CA2414636 CA 2414636 CA 2414636 A CA2414636 A CA 2414636A CA 2414636 A1 CA2414636 A1 CA 2414636A1
Authority
CA
Canada
Prior art keywords
capturing
coefficients
full duplex
echo canceller
path information
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.)
Granted
Application number
CA 2414636
Other languages
English (en)
Other versions
CA2414636C (fr
Inventor
Franck Beaucoup
Michael Tetelbaum
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.)
Mitel Networks Corp
Original Assignee
Mitel Knowledge Corp
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 Mitel Knowledge Corp filed Critical Mitel Knowledge Corp
Priority to CA002414636A priority Critical patent/CA2414636C/fr
Publication of CA2414636A1 publication Critical patent/CA2414636A1/fr
Application granted granted Critical
Publication of CA2414636C publication Critical patent/CA2414636C/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Telephone Function (AREA)
CA002414636A 2002-12-18 2002-12-18 Methode de captage d'information sur trajet d'echo constant dans un telephone mains-libres fonctionnant en duplex integral Expired - Lifetime CA2414636C (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA002414636A CA2414636C (fr) 2002-12-18 2002-12-18 Methode de captage d'information sur trajet d'echo constant dans un telephone mains-libres fonctionnant en duplex integral

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA002414636A CA2414636C (fr) 2002-12-18 2002-12-18 Methode de captage d'information sur trajet d'echo constant dans un telephone mains-libres fonctionnant en duplex integral

Publications (2)

Publication Number Publication Date
CA2414636A1 true CA2414636A1 (fr) 2004-06-18
CA2414636C CA2414636C (fr) 2006-09-12

Family

ID=32514066

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002414636A Expired - Lifetime CA2414636C (fr) 2002-12-18 2002-12-18 Methode de captage d'information sur trajet d'echo constant dans un telephone mains-libres fonctionnant en duplex integral

Country Status (1)

Country Link
CA (1) CA2414636C (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2416971A (en) * 2004-08-04 2006-02-08 Mitel Networks Corp Calculating an expected echo return loss enhancement (erle) in an echo canceller

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2416971A (en) * 2004-08-04 2006-02-08 Mitel Networks Corp Calculating an expected echo return loss enhancement (erle) in an echo canceller
US7724893B2 (en) 2004-08-04 2010-05-25 Mitel Networks Corporation Method of adaptation step control in echo cancellers

Also Published As

Publication number Publication date
CA2414636C (fr) 2006-09-12

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Legal Events

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EEER Examination request
MKEX Expiry

Effective date: 20221219

MKEX Expiry

Effective date: 20221219