WO2008123062A1 - Echo canceller - Google Patents

Echo canceller Download PDF

Info

Publication number
WO2008123062A1
WO2008123062A1 PCT/JP2008/054955 JP2008054955W WO2008123062A1 WO 2008123062 A1 WO2008123062 A1 WO 2008123062A1 JP 2008054955 W JP2008054955 W JP 2008054955W WO 2008123062 A1 WO2008123062 A1 WO 2008123062A1
Authority
WO
WIPO (PCT)
Prior art keywords
circuit
talk state
signal
step size
partner
Prior art date
Application number
PCT/JP2008/054955
Other languages
French (fr)
Japanese (ja)
Inventor
Tomohiro Amitani
Original Assignee
Toa Corporation
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 Toa Corporation filed Critical Toa Corporation
Publication of WO2008123062A1 publication Critical patent/WO2008123062A1/en

Links

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
    • H04B3/234—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 using double talk detection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • H04R3/02—Circuits for transducers, loudspeakers or microphones for preventing acoustic reaction, i.e. acoustic oscillatory feedback

Abstract

[PROBLEMS] To realize an echo canceller compatible with each of the double talk state and the single talk state with a simple configuration at a low cost as compared in the conventional technique. [MEANS FOR SOLVING PROBLEMS] An intercom device (10) includes: a received voice detection circuit (22) for detecting whether a reception signal x[n] from a partner device contains a voice component of the partner; and a transmitted voice detection circuit (26) for detecting whether a an error signal e(t) as a transmission signal to the partner contains a voice component of the speaker of this side. According to the detection results A and B obtained by the detection circuits (22, 26), a judgment circuit (24) judges whether the mode is in the double talk state or the signal talk state. According to a judgment result C obtained by the judgment circuit (24), a step size control circuit (28) generates a step size control signal D so as to appropriately set the step size μ of an adaptive filter circuit (20).
PCT/JP2008/054955 2007-03-30 2008-03-18 Echo canceller WO2008123062A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2007-090979 2007-03-30
JP2007090979A JP2008252510A (en) 2007-03-30 2007-03-30 Echo canceller

Publications (1)

Publication Number Publication Date
WO2008123062A1 true WO2008123062A1 (en) 2008-10-16

Family

ID=39830563

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2008/054955 WO2008123062A1 (en) 2007-03-30 2008-03-18 Echo canceller

Country Status (2)

Country Link
JP (1) JP2008252510A (en)
WO (1) WO2008123062A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013054459A1 (en) * 2011-10-14 2013-04-18 パナソニック株式会社 Howling suppression device, hearing aid, howling suppression method, and integrated circuit
CN110913312A (en) * 2018-09-17 2020-03-24 海信集团有限公司 Echo cancellation method and device
CN112867395A (en) * 2018-10-30 2021-05-28 株式会社尼罗沃克 Travel route generation system, travel route generation method, travel route generation program, and unmanned aerial vehicle

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5025753B2 (en) * 2010-03-31 2012-09-12 株式会社東芝 Echo canceling apparatus and method
KR20170032603A (en) 2015-09-15 2017-03-23 삼성전자주식회사 Electric device, acoustic echo cancelling method of thereof and non-transitory computer readable recording medium

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04271622A (en) * 1991-02-27 1992-09-28 Nec Corp Echo canceller
JPH0613940A (en) * 1992-06-29 1994-01-21 Oki Electric Ind Co Ltd Echo canceller
JPH10308814A (en) * 1997-05-06 1998-11-17 Fujitsu Ltd Voice switch for speaking equipment
JPH11289282A (en) * 1998-03-31 1999-10-19 Sanyo Electric Co Ltd Echo canceler controlling method and echo removing device
JP2000305579A (en) * 1999-04-23 2000-11-02 Matsushita Electric Works Ltd Speech detecting device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04271622A (en) * 1991-02-27 1992-09-28 Nec Corp Echo canceller
JPH0613940A (en) * 1992-06-29 1994-01-21 Oki Electric Ind Co Ltd Echo canceller
JPH10308814A (en) * 1997-05-06 1998-11-17 Fujitsu Ltd Voice switch for speaking equipment
JPH11289282A (en) * 1998-03-31 1999-10-19 Sanyo Electric Co Ltd Echo canceler controlling method and echo removing device
JP2000305579A (en) * 1999-04-23 2000-11-02 Matsushita Electric Works Ltd Speech detecting device

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013054459A1 (en) * 2011-10-14 2013-04-18 パナソニック株式会社 Howling suppression device, hearing aid, howling suppression method, and integrated circuit
CN103168479A (en) * 2011-10-14 2013-06-19 松下电器产业株式会社 Howling suppression device, hearing aid, howling suppression method, and integrated circuit
JPWO2013054459A1 (en) * 2011-10-14 2015-03-30 パナソニックＩｐマネジメント株式会社 Howling suppression device, hearing aid, howling suppression method, and integrated circuit
US9123322B2 (en) 2011-10-14 2015-09-01 Panasonic Intellectual Property Management Co., Ltd. Howling suppression device, hearing aid, howling suppression method, and integrated circuit
CN103168479B (en) * 2011-10-14 2016-11-23 松下知识产权经营株式会社 Anti-singing device, sonifer, singing suppressing method and integrated circuit
CN110913312A (en) * 2018-09-17 2020-03-24 海信集团有限公司 Echo cancellation method and device
CN110913312B (en) * 2018-09-17 2021-06-18 海信集团有限公司 Echo cancellation method and device
CN112867395A (en) * 2018-10-30 2021-05-28 株式会社尼罗沃克 Travel route generation system, travel route generation method, travel route generation program, and unmanned aerial vehicle
CN112867395B (en) * 2018-10-30 2022-09-23 株式会社尼罗沃克 Travel route generation system, travel route generation method, computer-readable recording medium, and unmanned aerial vehicle

Also Published As

Publication number Publication date
JP2008252510A (en) 2008-10-16

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