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WO2009038182A1 - システム同定装置及びシステム同定方法 - Google Patents

システム同定装置及びシステム同定方法 Download PDF

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Publication number
WO2009038182A1
WO2009038182A1 PCT/JP2008/066997 JP2008066997W WO2009038182A1 WO 2009038182 A1 WO2009038182 A1 WO 2009038182A1 JP 2008066997 W JP2008066997 W JP 2008066997W WO 2009038182 A1 WO2009038182 A1 WO 2009038182A1
Authority
WO
WIPO (PCT)
Prior art keywords
subtracter
output error
error mean
signal outputted
frequency band
Prior art date
Application number
PCT/JP2008/066997
Other languages
English (en)
French (fr)
Inventor
Osamu Houshuyama
Original Assignee
Nec 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 Nec Corporation filed Critical Nec Corporation
Priority to US12/679,217 priority Critical patent/US8503687B2/en
Priority to EP20080832387 priority patent/EP2192694B1/en
Priority to JP2009533203A priority patent/JP5321914B2/ja
Publication of WO2009038182A1 publication Critical patent/WO2009038182A1/ja

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
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H21/00—Adaptive networks
    • H03H21/0012—Digital adaptive filters
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L21/00—Speech or voice signal processing techniques to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
    • G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation
    • G10L21/0208—Noise filtering
    • G10L2021/02082—Noise filtering the noise being echo, reverberation of the speech
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L21/00—Speech or voice signal processing techniques to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
    • G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation
    • G10L21/0208—Noise filtering
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H21/00—Adaptive networks
    • H03H21/0012—Digital adaptive filters
    • H03H2021/007—Computation saving measures; Accelerating measures
    • H03H2021/0076—Measures relating to the convergence time
    • H03H2021/0078—Measures relating to the convergence time varying the step size
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H21/00—Adaptive networks
    • H03H21/0012—Digital adaptive filters
    • H03H2021/0081—Details
    • H03H2021/0083—Shadow filter, i.e. one of two filters which are simultaneously adapted, wherein the results of adapting the shadow filter are used for adapting the other filter

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Filters That Use Time-Delay Elements (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Telephone Function (AREA)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
  • Circuit For Audible Band Transducer (AREA)

Abstract

　第１の入力端子と第２の入力端子との間に介在する未知システムを同定するシステム同定装置を以下のように構成する。そのシステム同定装置は、第１の入力端子から供給される信号を入力とする適応フィルタおよび従属フィルタと、適応フィルタのフィルタ係数に基づいて、従属フィルタのフィルタ係数を更新する従属フィルタ係数更新部と、第２の入力端子から供給される信号から、適応フィルタの出力信号を減算する第１の減算器と、第１の減算器の出力信号から、第１の出力誤差平均を算出する第１の出力誤差平均算出部と、第２の入力端子から供給される信号から、従属フィルタの出力信号を減算する第２の減算器と、第２の減算器の出力信号から、第２の出力誤差平均を算出する第２の出力誤差平均算出部と、第１の出力誤差平均と第２の出力誤差平均とを比較する比較器とを備えることが好ましい。そして、第１の出力誤差平均算出部は、第１の減算器の出力信号の周波数帯域のうち、第２の入力端子に加わる観測雑音の周波数帯域と重複する帯域の少なくとも一部の帯域の成分を低減した残りの成分から第１の出力誤差平均を算出する。第２の出力誤差平均算出部は、第２の減算器の出力信号の周波数帯域のうち、第２の入力端子に加わる観測雑音の周波数帯域と重複する帯域の少なくとも一部の帯域の成分を低減した残りの成分から第２の出力誤差平均を算出する。そして、第１の減算器の出力信号による適応フィルタのフィルタ係数の更新、または、従属フィルタ係数更新部による従属フィルタのフィルタ係数の更新の少なくとも一方は、比較器の比較結果に基づいて制御される。  
PCT/JP2008/066997 2007-09-20 2008-09-19 システム同定装置及びシステム同定方法 WO2009038182A1 (ja)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US12/679,217 US8503687B2 (en) 2007-09-20 2008-09-19 System identification device and system identification method
EP20080832387 EP2192694B1 (en) 2007-09-20 2008-09-19 System identifying device and system identifying method
JP2009533203A JP5321914B2 (ja) 2007-09-20 2008-09-19 システム同定装置及びシステム同定方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2007243329 2007-09-20
JP2007-243329 2007-09-20

Publications (1)

Publication Number Publication Date
WO2009038182A1 true WO2009038182A1 (ja) 2009-03-26

Family

ID=40467991

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2008/066997 WO2009038182A1 (ja) 2007-09-20 2008-09-19 システム同定装置及びシステム同定方法

Country Status (4)

Country Link
US (1) US8503687B2 (ja)
EP (1) EP2192694B1 (ja)
JP (1) JP5321914B2 (ja)
WO (1) WO2009038182A1 (ja)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014174349A (ja) * 2013-03-08 2014-09-22 Toshiba Corp 能動消音装置および能動消音方法
JP2022542427A (ja) * 2019-08-01 2022-10-03 ドルビー ラボラトリーズ ライセンシング コーポレイション 共分散平滑化のためのシステム及び方法

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8477956B2 (en) * 2009-01-30 2013-07-02 Panasonic Corporation Howling suppression device, howling suppression method, program, and integrated circuit
US20150279373A1 (en) * 2014-03-31 2015-10-01 Nec Corporation Voice response apparatus, method for voice processing, and recording medium having program stored thereon
US11449979B2 (en) * 2020-10-09 2022-09-20 Applied Materials Israel Ltd. Measuring a pattern
CN113571035B (zh) * 2021-06-18 2022-06-21 荣耀终端有限公司 降噪方法及降噪装置

Citations (4)

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Publication number Priority date Publication date Assignee Title
JPS5635052B1 (ja) * 1971-05-19 1981-08-14
JPH04271623A (ja) * 1991-02-27 1992-09-28 Nec Corp ダブルトーク検出回路
JPH07176991A (ja) * 1993-12-21 1995-07-14 Shinsaku Mori 適応フィルタ装置及びその制御方法
JPH08274690A (ja) * 1995-01-09 1996-10-18 Texas Instr Inc <Ti> 近端スピーチ信号を検出するための方法および装置

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US5633636A (en) * 1995-10-02 1997-05-27 Analog Devices, Inc. Half-gray digital encoding method and circuitry
JP3187716B2 (ja) * 1996-05-10 2001-07-11 岩崎通信機株式会社 反響消去装置
CN102592605A (zh) * 2003-09-02 2012-07-18 日本电气株式会社 信号处理方法和装置
JP4403776B2 (ja) * 2003-11-05 2010-01-27 沖電気工業株式会社 エコーキャンセラ
DE602005015426D1 (de) * 2005-05-04 2009-08-27 Harman Becker Automotive Sys System und Verfahren zur Intensivierung von Audiosignalen
US8045730B1 (en) * 2006-04-20 2011-10-25 Hewlett-Packard Development Company, L.P. Methods and systems for reducing acoustic echoes in communication systems
TWI473715B (zh) 2011-11-29 2015-02-21 Ind Tech Res Inst 防霧結構、其形成方法與發光裝置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5635052B1 (ja) * 1971-05-19 1981-08-14
JPH04271623A (ja) * 1991-02-27 1992-09-28 Nec Corp ダブルトーク検出回路
JPH07176991A (ja) * 1993-12-21 1995-07-14 Shinsaku Mori 適応フィルタ装置及びその制御方法
JPH08274690A (ja) * 1995-01-09 1996-10-18 Texas Instr Inc <Ti> 近端スピーチ信号を検出するための方法および装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
OSAMU HOSHUYAMA ET AL.: "Heikinka Keisu o Yusuru Slave Filter ni Motozuita Kahen Step Algorithm", 1994 NEN THE INSTITUTE OF ELECTRONICS, INFORMATION AND COMMUNICATION ENGINEERS SHUNKI TAIKAI KOEN RONBUNSHU 1, THE INSTITUTE OF ELECTRONICS, INFORMATION AND COMMUNICATION ENGINEERS, 10 March 1994 (1994-03-10), pages 172 *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014174349A (ja) * 2013-03-08 2014-09-22 Toshiba Corp 能動消音装置および能動消音方法
JP2022542427A (ja) * 2019-08-01 2022-10-03 ドルビー ラボラトリーズ ライセンシング コーポレイション 共分散平滑化のためのシステム及び方法
JP7615120B2 (ja) 2019-08-01 2025-01-16 ドルビー ラボラトリーズ ライセンシング コーポレイション 共分散平滑化のためのシステム及び方法
JP2025060924A (ja) * 2019-08-01 2025-04-10 ドルビー ラボラトリーズ ライセンシング コーポレイション 共分散平滑化のためのシステム及び方法
US12431146B2 (en) 2019-08-01 2025-09-30 Dolby Laboratories Licensing Corporation Systems and methods for covariance smoothing

Also Published As

Publication number Publication date
JPWO2009038182A1 (ja) 2011-01-13
US20100260352A1 (en) 2010-10-14
JP5321914B2 (ja) 2013-10-23
US8503687B2 (en) 2013-08-06
EP2192694A1 (en) 2010-06-02
EP2192694B1 (en) 2015-04-29
EP2192694A4 (en) 2014-01-01

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