TW200635250A - Echo prevention circuit, digital signal processing circuit and filter coefficient setting method and program thereof - Google Patents

Echo prevention circuit, digital signal processing circuit and filter coefficient setting method and program thereof

Info

Publication number
TW200635250A
TW200635250A TW095109860A TW95109860A TW200635250A TW 200635250 A TW200635250 A TW 200635250A TW 095109860 A TW095109860 A TW 095109860A TW 95109860 A TW95109860 A TW 95109860A TW 200635250 A TW200635250 A TW 200635250A
Authority
TW
Taiwan
Prior art keywords
input
signal
fir filter
circuit
output signal
Prior art date
Application number
TW095109860A
Other languages
English (en)
Other versions
TWI373928B (zh
Inventor
Hideki Ohashi
Kozo Okuda
Takeo Inoue
Original Assignee
Sanyo Electric Co
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 Sanyo Electric Co filed Critical Sanyo Electric Co
Publication of TW200635250A publication Critical patent/TW200635250A/zh
Application granted granted Critical
Publication of TWI373928B publication Critical patent/TWI373928B/zh

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)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Telephone Function (AREA)
  • Circuit For Audible Band Transducer (AREA)
TW095109860A 2005-03-23 2006-03-22 Echo prevention circuit, digital signal processing circuit and filter coefficient setting method and program thereof TW200635250A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2005084963 2005-03-23
JP2006009064A JP4734126B2 (ja) 2005-03-23 2006-01-17 エコー防止回路、デジタル信号処理回路、エコー防止回路のフィルタ係数設定方法、デジタル信号処理回路のフィルタ係数設定方法、エコー防止回路のフィルタ係数を設定するためのプログラム、デジタル信号処理回路のフィルタ係数を設定するためのプログラム

Publications (2)

Publication Number Publication Date
TW200635250A true TW200635250A (en) 2006-10-01
TWI373928B TWI373928B (zh) 2012-10-01

Family

ID=37036454

Family Applications (1)

Application Number Title Priority Date Filing Date
TW095109860A TW200635250A (en) 2005-03-23 2006-03-22 Echo prevention circuit, digital signal processing circuit and filter coefficient setting method and program thereof

Country Status (5)

Country Link
US (1) US8934621B2 (zh)
JP (1) JP4734126B2 (zh)
KR (1) KR100796427B1 (zh)
CN (1) CN1838704B (zh)
TW (1) TW200635250A (zh)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TW200830706A (en) 2007-01-12 2008-07-16 Sanyo Electric Co Filter coefficient setting device and echo prevention device
JP4887181B2 (ja) * 2007-02-28 2012-02-29 オンセミコンダクター・トレーディング・リミテッド エコー防止装置及びプログラム
JP2010171880A (ja) 2009-01-26 2010-08-05 Sanyo Electric Co Ltd 音声信号処理装置

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5860835A (ja) * 1981-10-08 1983-04-11 Nippon Telegr & Teleph Corp <Ntt> 反響打消し装置
EP0287742B1 (en) * 1987-04-22 1993-01-13 International Business Machines Corporation Echo cancelling device for data transmission over two-wire line
US5307405A (en) * 1992-09-25 1994-04-26 Qualcomm Incorporated Network echo canceller
JP2842345B2 (ja) 1995-11-29 1999-01-06 日本電気株式会社 エコーキャンセラ
US5796819A (en) * 1996-07-24 1998-08-18 Ericsson Inc. Echo canceller for non-linear circuits
US5757933A (en) * 1996-12-11 1998-05-26 Micro Ear Technology, Inc. In-the-ear hearing aid with directional microphone system
US6147979A (en) * 1997-08-12 2000-11-14 Lucent Technologies, Inc. System and method for echo cancellation in a communication system
JP3293029B2 (ja) * 1999-08-20 2002-06-17 株式会社マイクロエムズ 通信装置用２線４線変換回路
JP3877271B2 (ja) 1999-11-05 2007-02-07 アルパイン株式会社 音声認識用オーディオキャンセル装置
JP3566158B2 (ja) * 1999-12-07 2004-09-15 三菱電機株式会社 エコーキャンセラ装置
KR20020036542A (ko) * 2000-11-10 2002-05-16 김승범 반향 제거 장치
JP2002232329A (ja) 2001-01-30 2002-08-16 Ricoh Co Ltd エコーキャンセラ
KR100545832B1 (ko) * 2003-03-21 2006-01-24 (주)씨앤에스 테크놀로지 간섭신호에 강인한 음향 반향 제거장치
US7881483B2 (en) * 2003-11-11 2011-02-01 Matech, Inc. Two-way communications device having a single transducer

Also Published As

Publication number Publication date
CN1838704A (zh) 2006-09-27
CN1838704B (zh) 2012-01-25
JP4734126B2 (ja) 2011-07-27
JP2006304260A (ja) 2006-11-02
US8934621B2 (en) 2015-01-13
KR20060103147A (ko) 2006-09-28
KR100796427B1 (ko) 2008-01-21
US20060218214A1 (en) 2006-09-28
TWI373928B (zh) 2012-10-01

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Legal Events

Date Code Title Description
MM4A Annulment or lapse of patent due to non-payment of fees