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 thereofInfo
- 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
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)
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)
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)
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 |
DE3783605T2 (de) * | 1987-04-22 | 1993-07-15 | Ibm | Echokompensationseinrichtung fuer datenuebertragung ueber eine zweidrahtleitung. |
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 |
-
2006
- 2006-01-17 JP JP2006009064A patent/JP4734126B2/ja not_active Expired - Fee Related
- 2006-03-22 US US11/277,200 patent/US8934621B2/en not_active Expired - Fee Related
- 2006-03-22 KR KR1020060026095A patent/KR100796427B1/ko not_active IP Right Cessation
- 2006-03-22 TW TW095109860A patent/TW200635250A/zh not_active IP Right Cessation
- 2006-03-23 CN CN 200610065170 patent/CN1838704B/zh not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
TWI373928B (zh) | 2012-10-01 |
US8934621B2 (en) | 2015-01-13 |
CN1838704B (zh) | 2012-01-25 |
JP2006304260A (ja) | 2006-11-02 |
CN1838704A (zh) | 2006-09-27 |
US20060218214A1 (en) | 2006-09-28 |
KR100796427B1 (ko) | 2008-01-21 |
JP4734126B2 (ja) | 2011-07-27 |
KR20060103147A (ko) | 2006-09-28 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
MM4A | Annulment or lapse of patent due to non-payment of fees |