WO2008123317A1 - 信号処理装置、エコーキャンセラ、信号処理方法 - Google Patents

信号処理装置、エコーキャンセラ、信号処理方法 Download PDF

Info

Publication number
WO2008123317A1
WO2008123317A1 PCT/JP2008/055759 JP2008055759W WO2008123317A1 WO 2008123317 A1 WO2008123317 A1 WO 2008123317A1 JP 2008055759 W JP2008055759 W JP 2008055759W WO 2008123317 A1 WO2008123317 A1 WO 2008123317A1
Authority
WO
WIPO (PCT)
Prior art keywords
valued
real
data
signal processing
gdft
Prior art date
Application number
PCT/JP2008/055759
Other languages
English (en)
French (fr)
Inventor
Sakae Fujimaki
Original Assignee
Asahi Kasei Kabushiki Kaisha
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 Asahi Kasei Kabushiki Kaisha filed Critical Asahi Kasei Kabushiki Kaisha
Priority to JP2009509149A priority Critical patent/JP4769323B2/ja
Priority to US12/531,474 priority patent/US8634546B2/en
Publication of WO2008123317A1 publication Critical patent/WO2008123317A1/ja

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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H17/00—Networks using digital techniques
    • H03H17/02—Frequency selective networks
    • H03H17/0248—Filters characterised by a particular frequency response or filtering method
    • H03H17/0264—Filter sets with mutual related characteristics
    • H03H17/0266—Filter banks
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • Mathematical Physics (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Telephone Function (AREA)

Abstract

　分割数をＫ、間引き率をＮとしてＫ＝４Ｎの場合に、分析フィルタ処理部２１で実数入力データをＮサンプル毎に分析フィルタ処理を行いＫサンプルの実数データを出力し、このデータに対してＧＤＦＴ・ＳＳＢ変調一括処理部（８１）でＧＤＦＴ処理及びＳＳＢ変調処理を（Ｋ／２）×Ｋ実数行列を用いた実数行列演算で行い１サンプル×（Ｋ／２）チャンネルの実数帯域分割データを出力する。また、１サンプル×（Ｋ／２）チャンネルの実数帯域分割データに対してＳＳＢ復調・逆ＧＤＦＴ一括処理部（８２）でＳＳＢ復調処理及び逆ＧＤＦＴ処理をＫ×（Ｋ／２）実数行列を用いた実数行列演算で行いＫサンプルの実数データを出力し、このデータに対して合成フィルタ処理部（２４）で合成フィルタ処理を行いＮサンプルの実数データを出力する。
PCT/JP2008/055759 2007-03-29 2008-03-26 信号処理装置、エコーキャンセラ、信号処理方法 WO2008123317A1 (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2009509149A JP4769323B2 (ja) 2007-03-29 2008-03-26 信号処理装置、エコーキャンセラ、信号処理方法
US12/531,474 US8634546B2 (en) 2007-03-29 2008-03-26 Signal processing device, echo canceller, and signal processing method

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2007087922 2007-03-29
JP2007-087922 2007-03-29

Publications (1)

Publication Number Publication Date
WO2008123317A1 true WO2008123317A1 (ja) 2008-10-16

Family

ID=39830805

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2008/055759 WO2008123317A1 (ja) 2007-03-29 2008-03-26 信号処理装置、エコーキャンセラ、信号処理方法

Country Status (3)

Country Link
US (1) US8634546B2 (ja)
JP (1) JP4769323B2 (ja)
WO (1) WO2008123317A1 (ja)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009104252A1 (ja) * 2008-02-20 2009-08-27 富士通株式会社 音処理装置、音処理方法及び音処理プログラム
CN102163976B (zh) * 2011-01-20 2013-02-27 东南大学 一种基于gdft-ii变换的快速解码方法
GB2494425A (en) 2011-09-07 2013-03-13 Zarlink Semiconductor Inc Over-sampled single-sided subband echo cancellation
WO2016179740A1 (zh) * 2015-05-08 2016-11-17 华为技术有限公司 处理信号的方法及装置

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05216496A (ja) * 1992-02-06 1993-08-27 Matsushita Electric Ind Co Ltd 帯域分割フィルタ
JPH08307323A (ja) * 1995-05-11 1996-11-22 Hitachi Ltd 帯域分割型エコーキャンセラー

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03243020A (ja) 1990-02-21 1991-10-30 Fujitsu Ltd サブバンド型エコーキャンセラ
JP3391141B2 (ja) 1994-03-24 2003-03-31 住友電気工業株式会社 微小機械部品及びその製造方法
CA2399159A1 (en) * 2002-08-16 2004-02-16 Dspfactory Ltd. Convergence improvement for oversampled subband adaptive filters

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05216496A (ja) * 1992-02-06 1993-08-27 Matsushita Electric Ind Co Ltd 帯域分割フィルタ
JPH08307323A (ja) * 1995-05-11 1996-11-22 Hitachi Ltd 帯域分割型エコーキャンセラー

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
WEISS S. ET AL.: "Efficient subband adaptive filtering with oversampled GDFT filter banks", IEE COLLOQUIUM ON ADAPTIVE SIGNAL PROCESSING FOR MOBILE COMMUNICATION SYSTEMS, October 1997 (1997-10-01), pages 1 - 9, XP006506797 *

Also Published As

Publication number Publication date
JPWO2008123317A1 (ja) 2010-07-15
US8634546B2 (en) 2014-01-21
US20100150365A1 (en) 2010-06-17
JP4769323B2 (ja) 2011-09-07

Similar Documents

Publication Publication Date Title
RU2009119456A (ru) Устройство и способ для генерации значений подполос звукового сигнала и устройство и способ для генерации отсчетов звукового сигнала во временной области
WO2008046468A3 (en) Analysis filterbank, synthesis filterbank, encoder, decoder, mixer and conferencing system
DE602005013750D1 (de) Stoffwechselüberwachung, verfahren und gerät zur aerson
WO2008123317A1 (ja) 信号処理装置、エコーキャンセラ、信号処理方法
JP2007235646A (ja) 音源分離装置、方法及びプログラム
ATE466413T1 (de) Verfahren und vorrichtung mit basisbandtransformation zur verbesserung von senderleistung
EP1983659A3 (en) Method and apparatus for dynamic digital pre-distortion in radio transmitters
WO2008015449A3 (en) Apparatus and method for obtaining eeg data
TW200733588A (en) Performing a correlation in reception of a spread spectrum signal
WO2019055876A3 (en) ENVIRONMENTAL MICROBIOMY ANALYSIS FUNCTIONAL PROBES AND METHODS OF MAKING AND USING THE SAME
WO2007007321A3 (en) Method and system for processing an electroencephalograph (eeg) signal
TW200736623A (en) Locally in-order strobing
ATE458340T1 (de) Mehrstrom-fft für mimo-ofdm-systeme
ATE482408T1 (de) Verfahren zur bearbeitung eines von einem analogen eingangssignal eines gnss-empfängers abgeleiteten digitalen signals, basisbandschaltung eines gnss-empfängers zur durchführung des verfahrens und gnss-empfänger
WO2006116564A3 (en) Analytical instrumentation, appartuses, and methods
WO2005062755A3 (en) Ofdm frequency offset estimation apparatus and method
CN102684831B (zh) 一种数字多通道相关处理系统及用于该系统中的缓存模块的输出方法
AU2002243664A1 (en) High speed filter
TW200625893A (en) System and method of processing frequency-diversity signals with reduced-sampling-rate receiver
Santamaria et al. Estimation of the magnitude squared coherence spectrum based on reduced-rank canonical coordinates
TWI266489B (en) Apparatus and method for increasing signal estimation accuraccy
SG130060A1 (en) Improvements in and relating to intermediate frequency receivers
WO2006130867A3 (en) Frequency spectrum conversion to natural harmonic frequencies process
ATE476794T1 (de) Verfahren und vorrichtung zur erkennung von daten,die durch spektrumsspreizung übertragen werden
CN110061719A (zh) 一种基于zynq-7010的自适应滤波器

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 08738947

Country of ref document: EP

Kind code of ref document: A1

DPE1 Request for preliminary examination filed after expiration of 19th month from priority date (pct application filed from 20040101)
ENP Entry into the national phase

Ref document number: 2009509149

Country of ref document: JP

Kind code of ref document: A

NENP Non-entry into the national phase

Ref country code: DE

WWE Wipo information: entry into national phase

Ref document number: 12531474

Country of ref document: US

122 Ep: pct application non-entry in european phase

Ref document number: 08738947

Country of ref document: EP

Kind code of ref document: A1