FR2678453B1 - TELEPHONE SET WITH ECHO CANCELLATION DEVICE. - Google Patents

TELEPHONE SET WITH ECHO CANCELLATION DEVICE.

Info

Publication number
FR2678453B1
FR2678453B1 FR9107965A FR9107965A FR2678453B1 FR 2678453 B1 FR2678453 B1 FR 2678453B1 FR 9107965 A FR9107965 A FR 9107965A FR 9107965 A FR9107965 A FR 9107965A FR 2678453 B1 FR2678453 B1 FR 2678453B1
Authority
FR
France
Prior art keywords
telephone set
echo cancellation
cancellation device
echo
telephone
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 - Fee Related
Application number
FR9107965A
Other languages
French (fr)
Other versions
FR2678453A1 (en
Inventor
Christian Freund
Alain Saunier
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.)
ALE International SAS
Original Assignee
Alcatel Business Systemes 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 Alcatel Business Systemes SA filed Critical Alcatel Business Systemes SA
Priority to FR9107965A priority Critical patent/FR2678453B1/en
Publication of FR2678453A1 publication Critical patent/FR2678453A1/en
Application granted granted Critical
Publication of FR2678453B1 publication Critical patent/FR2678453B1/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • H04B3/21—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other using a set of bandfilters
    • 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
FR9107965A 1991-06-27 1991-06-27 TELEPHONE SET WITH ECHO CANCELLATION DEVICE. Expired - Fee Related FR2678453B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR9107965A FR2678453B1 (en) 1991-06-27 1991-06-27 TELEPHONE SET WITH ECHO CANCELLATION DEVICE.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR9107965A FR2678453B1 (en) 1991-06-27 1991-06-27 TELEPHONE SET WITH ECHO CANCELLATION DEVICE.

Publications (2)

Publication Number Publication Date
FR2678453A1 FR2678453A1 (en) 1992-12-31
FR2678453B1 true FR2678453B1 (en) 1994-12-09

Family

ID=9414377

Family Applications (1)

Application Number Title Priority Date Filing Date
FR9107965A Expired - Fee Related FR2678453B1 (en) 1991-06-27 1991-06-27 TELEPHONE SET WITH ECHO CANCELLATION DEVICE.

Country Status (1)

Country Link
FR (1) FR2678453B1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6510224B1 (en) 1999-05-20 2003-01-21 Telefonaktiebolaget L M Ericsson Enhancement of near-end voice signals in an echo suppression system
US7433462B2 (en) 2002-10-31 2008-10-07 Plantronics, Inc Techniques for improving telephone audio quality

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS583430A (en) * 1981-06-30 1983-01-10 Nec Corp Suppressing device of detouring signal
US4609787A (en) * 1984-05-21 1986-09-02 Communications Satellite Corporation Echo canceller with extended frequency range
JPS63294018A (en) * 1987-05-27 1988-11-30 Oki Electric Ind Co Ltd Loud-speaker telephone set
JP2594055B2 (en) * 1987-06-09 1997-03-26 日本電信電話株式会社 Voice switch device
JP2542625B2 (en) * 1987-07-24 1996-10-09 日本電信電話株式会社 Echo canceller

Also Published As

Publication number Publication date
FR2678453A1 (en) 1992-12-31

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Legal Events

Date Code Title Description
ST Notification of lapse