PL3279893T3 - Kształtowanie obwiedni czasowej do kodowania przestrzennego audio w wykorzystaniem filtracji wienera w dziedzinie częstotliwości - Google Patents

Kształtowanie obwiedni czasowej do kodowania przestrzennego audio w wykorzystaniem filtracji wienera w dziedzinie częstotliwości

Info

Publication number
PL3279893T3
PL3279893T3 PL17193794T PL17193794T PL3279893T3 PL 3279893 T3 PL3279893 T3 PL 3279893T3 PL 17193794 T PL17193794 T PL 17193794T PL 17193794 T PL17193794 T PL 17193794T PL 3279893 T3 PL3279893 T3 PL 3279893T3
Authority
PL
Poland
Prior art keywords
frequency domain
audio coding
spatial audio
temporal envelope
wiener filtering
Prior art date
Application number
PL17193794T
Other languages
English (en)
Inventor
Mark Stuart Vinton
Alan Jeffrey Seefeldt
Original Assignee
Dolby Laboratories Licensing 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 Dolby Laboratories Licensing Corporation filed Critical Dolby Laboratories Licensing Corporation
Publication of PL3279893T3 publication Critical patent/PL3279893T3/pl

Links

Classifications

    • GPHYSICS
    • G10MUSICAL INSTRUMENTS; ACOUSTICS
    • G10LSPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L19/00Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
    • G10L19/008Multichannel audio signal coding or decoding using interchannel correlation to reduce redundancy, e.g. joint-stereo, intensity-coding or matrixing
    • GPHYSICS
    • G10MUSICAL INSTRUMENTS; ACOUSTICS
    • G10LSPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L19/00Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
    • G10L19/02Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis using spectral analysis, e.g. transform vocoders or subband vocoders
    • HELECTRICITY
    • H03ELECTRONIC CIRCUITRY
    • H03MCODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M7/00Conversion of a code where information is represented by a given sequence or number of digits to a code where the same, similar or subset of information is represented by a different sequence or number of digits
    • H03M7/30Compression; Expansion; Suppression of unnecessary data, e.g. redundancy reduction

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Computational Linguistics (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Human Computer Interaction (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Mathematical Physics (AREA)
  • Theoretical Computer Science (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Stereophonic System (AREA)
  • Apparatuses For Bulk Treatment Of Fruits And Vegetables And Apparatuses For Preparing Feeds (AREA)
PL17193794T 2004-08-25 2005-08-15 Kształtowanie obwiedni czasowej do kodowania przestrzennego audio w wykorzystaniem filtracji wienera w dziedzinie częstotliwości PL3279893T3 (pl)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US60483604P 2004-08-25 2004-08-25
EP17193794.9A EP3279893B1 (en) 2004-08-25 2005-08-15 Temporal envelope shaping for spatial audio coding using frequency domain wiener filtering
EP05786297.1A EP1784818B1 (en) 2004-08-25 2005-08-15 Temporal envelope shaping for spatial audio coding using frequency domain wiener filtering
PCT/US2005/029157 WO2006026161A2 (en) 2004-08-25 2005-08-15 Temporal envelope shaping for spatial audio coding using frequency domain wiener filtering

Publications (1)

Publication Number Publication Date
PL3279893T3 true PL3279893T3 (pl) 2022-02-07

Family

ID=35636849

Family Applications (3)

Application Number Title Priority Date Filing Date
PL21195475.5T PL3940697T3 (pl) 2004-08-25 2005-08-15 Kształtowanie obwiedni czasowej do kodowania przestrzennego audio z wykorzystaniem filtracji wienera w dziedzinie częstotliwości
PL17193794T PL3279893T3 (pl) 2004-08-25 2005-08-15 Kształtowanie obwiedni czasowej do kodowania przestrzennego audio w wykorzystaniem filtracji wienera w dziedzinie częstotliwości
PL05786297T PL1784818T3 (pl) 2004-08-25 2005-08-15 Kształtowanie tymczasowej obwiedni dla przestrzennego kodowania audio przy użyciu filtrowania Wienera w domenie częstotliwości

Family Applications Before (1)

Application Number Title Priority Date Filing Date
PL21195475.5T PL3940697T3 (pl) 2004-08-25 2005-08-15 Kształtowanie obwiedni czasowej do kodowania przestrzennego audio z wykorzystaniem filtracji wienera w dziedzinie częstotliwości

Family Applications After (1)

Application Number Title Priority Date Filing Date
PL05786297T PL1784818T3 (pl) 2004-08-25 2005-08-15 Kształtowanie tymczasowej obwiedni dla przestrzennego kodowania audio przy użyciu filtrowania Wienera w domenie częstotliwości

Country Status (15)

Country Link
US (3) US8255211B2 (pl)
EP (4) EP3279893B1 (pl)
JP (2) JP5038138B2 (pl)
KR (3) KR20120006077A (pl)
CN (3) CN101006494B (pl)
AU (2) AU2005280392B2 (pl)
BR (3) BR122018077099B1 (pl)
CA (1) CA2589623C (pl)
ES (3) ES2923661T3 (pl)
IL (3) IL181407A (pl)
MX (1) MX2007001948A (pl)
MY (2) MY151318A (pl)
PL (3) PL3940697T3 (pl)
TW (3) TWI393120B (pl)
WO (1) WO2006026161A2 (pl)

Families Citing this family (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI393120B (zh) * 2004-08-25 2013-04-11 Dolby Lab Licensing Corp 用於音訊信號編碼及解碼之方法和系統、音訊信號編碼器、音訊信號解碼器、攜帶有位元流之電腦可讀取媒體、及儲存於電腦可讀取媒體上的電腦程式
JP4988716B2 (ja) 2005-05-26 2012-08-01 エルジー エレクトロニクス インコーポレイティド オーディオ信号のデコーディング方法及び装置
US8577686B2 (en) * 2005-05-26 2013-11-05 Lg Electronics Inc. Method and apparatus for decoding an audio signal
TWI396188B (zh) 2005-08-02 2013-05-11 Dolby Lab Licensing Corp 依聆聽事件之函數控制空間音訊編碼參數的技術
WO2007046660A1 (en) * 2005-10-20 2007-04-26 Lg Electronics Inc. Method for encoding and decoding multi-channel audio signal and apparatus thereof
EP1974347B1 (en) * 2006-01-19 2014-08-06 LG Electronics Inc. Method and apparatus for processing a media signal
KR100921453B1 (ko) * 2006-02-07 2009-10-13 엘지전자 주식회사 부호화/복호화 장치 및 방법
BRPI0621499B1 (pt) * 2006-03-28 2022-04-12 Fraunhofer-Gesellschaft Zur Forderung Der Angewandten Forschung E.V. Método melhorado para formatação de sinal em reconstrução de áudio de canais múltiplos
CN101790758B (zh) 2007-07-13 2013-01-09 杜比实验室特许公司 用于控制音频信号的信号处理的设备和方法
CN101673545B (zh) * 2008-09-12 2011-11-16 华为技术有限公司 一种编解码方法及装置
EP2214161A1 (en) * 2009-01-28 2010-08-04 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Apparatus, method and computer program for upmixing a downmix audio signal
JP5340378B2 (ja) * 2009-02-26 2013-11-13 パナソニック株式会社 チャネル信号生成装置、音響信号符号化装置、音響信号復号装置、音響信号符号化方法及び音響信号復号方法
JP4932917B2 (ja) * 2009-04-03 2012-05-16 株式会社エヌ・ティ・ティ・ドコモ 音声復号装置、音声復号方法、及び音声復号プログラム
AU2011237882B2 (en) 2010-04-09 2014-07-24 Dolby International Ab MDCT-based complex prediction stereo coding
US9008811B2 (en) 2010-09-17 2015-04-14 Xiph.org Foundation Methods and systems for adaptive time-frequency resolution in digital data coding
EP2469741A1 (en) * 2010-12-21 2012-06-27 Thomson Licensing Method and apparatus for encoding and decoding successive frames of an ambisonics representation of a 2- or 3-dimensional sound field
WO2012093290A1 (en) * 2011-01-05 2012-07-12 Nokia Corporation Multi-channel encoding and/or decoding
US9015042B2 (en) 2011-03-07 2015-04-21 Xiph.org Foundation Methods and systems for avoiding partial collapse in multi-block audio coding
US8838442B2 (en) 2011-03-07 2014-09-16 Xiph.org Foundation Method and system for two-step spreading for tonal artifact avoidance in audio coding
US9009036B2 (en) 2011-03-07 2015-04-14 Xiph.org Foundation Methods and systems for bit allocation and partitioning in gain-shape vector quantization for audio coding
KR101903664B1 (ko) * 2012-08-10 2018-11-22 프라운호퍼 게젤샤프트 쭈르 푀르데룽 데어 안겐반텐 포르슝 에. 베. 파라미터 오디오 오브젝트 코딩을 위한 잔류 개념을 이용하는 인코더, 디코더, 시스템 및 방법
RU2625444C2 (ru) * 2013-04-05 2017-07-13 Долби Интернэшнл Аб Система обработки аудио
EP2830061A1 (en) 2013-07-22 2015-01-28 Fraunhofer Gesellschaft zur Förderung der angewandten Forschung e.V. Apparatus and method for encoding and decoding an encoded audio signal using temporal noise/patch shaping
JP6035270B2 (ja) * 2014-03-24 2016-11-30 株式会社Nttドコモ 音声復号装置、音声符号化装置、音声復号方法、音声符号化方法、音声復号プログラム、および音声符号化プログラム
EP3701523B1 (en) 2017-10-27 2021-10-20 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Noise attenuation at a decoder
JP7092047B2 (ja) * 2019-01-17 2022-06-28 日本電信電話株式会社 符号化復号方法、復号方法、これらの装置及びプログラム
TW202334938A (zh) * 2021-12-20 2023-09-01 瑞典商都比國際公司 正交鏡像濾波器域中之沉浸式音訊及視訊服務空間重建濾波器庫
KR102446720B1 (ko) * 2022-02-18 2022-09-26 오드컨셉 주식회사 이미지 복원 모델, 및 이미지 복원 모델의 학습 방법
KR102423552B1 (ko) * 2022-02-28 2022-07-21 오드컨셉 주식회사 적대적 생성 신경망으로 구성된 상품 이미지 복원 및 합성 모델, 및 상품 이미지 복원 및 합성 모델의 학습 방법

Family Cites Families (55)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4875095A (en) * 1987-06-30 1989-10-17 Kokusai Denshin Denwa Kabushiki Kaisha Noise-shaping predictive coding system
US4943855A (en) * 1988-07-22 1990-07-24 At&T Bell Laboratories Progressive sub-band image coding system
US6289308B1 (en) 1990-06-01 2001-09-11 U.S. Philips Corporation Encoded wideband digital transmission signal and record carrier recorded with such a signal
US5539829A (en) 1989-06-02 1996-07-23 U.S. Philips Corporation Subband coded digital transmission system using some composite signals
NL9000338A (nl) 1989-06-02 1991-01-02 Koninkl Philips Electronics Nv Digitaal transmissiesysteem, zender en ontvanger te gebruiken in het transmissiesysteem en registratiedrager verkregen met de zender in de vorm van een optekeninrichting.
EP0506680B1 (en) * 1989-10-11 1997-12-29 Cias Inc. Optimal error-detecting and error-correcting code and apparatus
US5632005A (en) 1991-01-08 1997-05-20 Ray Milton Dolby Encoder/decoder for multidimensional sound fields
EP0520068B1 (en) 1991-01-08 1996-05-15 Dolby Laboratories Licensing Corporation Encoder/decoder for multidimensional sound fields
NL9100173A (nl) 1991-02-01 1992-09-01 Philips Nv Subbandkodeerinrichting, en een zender voorzien van de kodeerinrichting.
JP2693893B2 (ja) * 1992-03-30 1997-12-24 松下電器産業株式会社 ステレオ音声符号化方法
DE4320990B4 (de) * 1993-06-05 2004-04-29 Robert Bosch Gmbh Verfahren zur Redundanzreduktion
US5623577A (en) * 1993-07-16 1997-04-22 Dolby Laboratories Licensing Corporation Computationally efficient adaptive bit allocation for encoding method and apparatus with allowance for decoder spectral distortions
DE4331376C1 (de) * 1993-09-15 1994-11-10 Fraunhofer Ges Forschung Verfahren zum Bestimmen der zu wählenden Codierungsart für die Codierung von wenigstens zwei Signalen
BE1007616A3 (nl) 1993-10-11 1995-08-22 Philips Electronics Nv Transmissiesysteem met vereenvoudigde broncodering.
DE4409368A1 (de) * 1994-03-18 1995-09-21 Fraunhofer Ges Forschung Verfahren zum Codieren mehrerer Audiosignale
JP3365874B2 (ja) 1994-10-05 2003-01-14 富士写真フイルム株式会社 キノンジアジドの合成法およびこれを含むポジ型レジスト
US5727119A (en) 1995-03-27 1998-03-10 Dolby Laboratories Licensing Corporation Method and apparatus for efficient implementation of single-sideband filter banks providing accurate measures of spectral magnitude and phase
JP3747492B2 (ja) * 1995-06-20 2006-02-22 ソニー株式会社 音声信号の再生方法及び再生装置
JP4132109B2 (ja) * 1995-10-26 2008-08-13 ソニー株式会社 音声信号の再生方法及び装置、並びに音声復号化方法及び装置、並びに音声合成方法及び装置
US5812971A (en) * 1996-03-22 1998-09-22 Lucent Technologies Inc. Enhanced joint stereo coding method using temporal envelope shaping
GB9614209D0 (en) * 1996-07-05 1996-09-04 Univ Manchester Speech synthesis system
JP3259759B2 (ja) * 1996-07-22 2002-02-25 日本電気株式会社 音声信号伝送方法及び音声符号復号化システム
JP4132154B2 (ja) * 1997-10-23 2008-08-13 ソニー株式会社 音声合成方法及び装置、並びに帯域幅拡張方法及び装置
DE19747132C2 (de) * 1997-10-24 2002-11-28 Fraunhofer Ges Forschung Verfahren und Vorrichtungen zum Codieren von Audiosignalen sowie Verfahren und Vorrichtungen zum Decodieren eines Bitstroms
TW382094B (en) * 1997-12-11 2000-02-11 Inventec Corp Base tone synchronous differential coding method and device thereof
US6529730B1 (en) * 1998-05-15 2003-03-04 Conexant Systems, Inc System and method for adaptive multi-rate (AMR) vocoder rate adaption
WO2002021794A2 (en) * 2000-09-08 2002-03-14 Findthedot,Inc. A method and system of connecting printed media to electronic information as a response to a request
US6614365B2 (en) * 2000-12-14 2003-09-02 Sony Corporation Coding device and method, decoding device and method, and recording medium
US7644003B2 (en) * 2001-05-04 2010-01-05 Agere Systems Inc. Cue-based audio coding/decoding
US7292901B2 (en) 2002-06-24 2007-11-06 Agere Systems Inc. Hybrid multi-channel/cue coding/decoding of audio signals
US7116787B2 (en) 2001-05-04 2006-10-03 Agere Systems Inc. Perceptual synthesis of auditory scenes
US20030035553A1 (en) 2001-08-10 2003-02-20 Frank Baumgarte Backwards-compatible perceptual coding of spatial cues
US7006636B2 (en) 2002-05-24 2006-02-28 Agere Systems Inc. Coherence-based audio coding and synthesis
SE0202159D0 (sv) 2001-07-10 2002-07-09 Coding Technologies Sweden Ab Efficientand scalable parametric stereo coding for low bitrate applications
US20030187663A1 (en) 2002-03-28 2003-10-02 Truman Michael Mead Broadband frequency translation for high frequency regeneration
JP4399185B2 (ja) * 2002-04-11 2010-01-13 パナソニック株式会社 符号化装置および復号化装置
DE60307252T2 (de) * 2002-04-11 2007-07-19 Matsushita Electric Industrial Co., Ltd., Kadoma Einrichtungen, verfahren und programme zur kodierung und dekodierung
SE521130C2 (sv) 2002-04-17 2003-10-07 Dirac Res Ab Digital audiokompensering
EP1500083B1 (en) 2002-04-22 2006-06-28 Koninklijke Philips Electronics N.V. Parametric multi-channel audio representation
DE60311794C5 (de) 2002-04-22 2022-11-10 Koninklijke Philips N.V. Signalsynthese
JP4714416B2 (ja) 2002-04-22 2011-06-29 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ 空間的オーディオのパラメータ表示
US20040086130A1 (en) * 2002-05-03 2004-05-06 Eid Bradley F. Multi-channel sound processing systems
BRPI0305434B1 (pt) * 2002-07-12 2017-06-27 Koninklijke Philips Electronics N.V. Methods and arrangements for encoding and decoding a multichannel audio signal, and multichannel audio coded signal
KR101001170B1 (ko) * 2002-07-16 2010-12-15 코닌클리케 필립스 일렉트로닉스 엔.브이. 오디오 코딩
US20040083417A1 (en) * 2002-10-29 2004-04-29 Lane Richard D. Multimedia transmission using variable error coding rate based on data importance
US7447317B2 (en) * 2003-10-02 2008-11-04 Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V Compatible multi-channel coding/decoding by weighting the downmix channel
US7394903B2 (en) * 2004-01-20 2008-07-01 Fraunhofer-Gesellschaft Zur Forderung Der Angewandten Forschung E.V. Apparatus and method for constructing a multi-channel output signal or for generating a downmix signal
KR101079066B1 (ko) 2004-03-01 2011-11-02 돌비 레버러토리즈 라이쎈싱 코오포레이션 멀티채널 오디오 코딩
SE0400998D0 (sv) * 2004-04-16 2004-04-16 Cooding Technologies Sweden Ab Method for representing multi-channel audio signals
US7391870B2 (en) * 2004-07-09 2008-06-24 Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E V Apparatus and method for generating a multi-channel output signal
ES2333137T3 (es) * 2004-07-14 2010-02-17 Koninklijke Philips Electronics N.V. Conversion de canal de audio.
TWI393120B (zh) 2004-08-25 2013-04-11 Dolby Lab Licensing Corp 用於音訊信號編碼及解碼之方法和系統、音訊信號編碼器、音訊信號解碼器、攜帶有位元流之電腦可讀取媒體、及儲存於電腦可讀取媒體上的電腦程式
US10113858B2 (en) 2015-08-19 2018-10-30 Medlumics S.L. Distributed delay-line for low-coherence interferometry
US9996281B2 (en) 2016-03-04 2018-06-12 Western Digital Technologies, Inc. Temperature variation compensation
CN113535073B (zh) 2020-04-22 2024-04-16 伊姆西Ip控股有限责任公司 管理存储单元的方法、电子设备和计算机可读存储介质

Also Published As

Publication number Publication date
ES2899286T3 (es) 2022-03-10
CA2589623A1 (en) 2006-03-09
IL214135A (en) 2015-10-29
MY163042A (en) 2017-07-31
EP3279893B1 (en) 2021-09-22
CN101006494A (zh) 2007-07-25
US8255211B2 (en) 2012-08-28
EP4036914A1 (en) 2022-08-03
WO2006026161A3 (en) 2006-05-04
TW200611240A (en) 2006-04-01
CN101006494B (zh) 2011-09-07
KR20120006077A (ko) 2012-01-17
IL214135A0 (en) 2011-08-31
MX2007001948A (es) 2007-04-23
TWI393120B (zh) 2013-04-11
AU2011200680C1 (en) 2013-03-14
ES2923661T3 (es) 2022-09-29
IL201469A0 (en) 2011-07-31
BR122018077089B8 (pt) 2021-01-05
WO2006026161A2 (en) 2006-03-09
JP2012177939A (ja) 2012-09-13
PL1784818T3 (pl) 2018-04-30
EP3279893A1 (en) 2018-02-07
TW201333933A (zh) 2013-08-16
CA2589623C (en) 2014-10-28
IL181407A0 (en) 2007-07-04
TWI497485B (zh) 2015-08-21
KR101139880B1 (ko) 2012-05-02
EP3940697B1 (en) 2022-06-22
CN102968996A (zh) 2013-03-13
AU2011200680B2 (en) 2012-05-24
JP2008511040A (ja) 2008-04-10
JP5292498B2 (ja) 2013-09-18
CN102968996B (zh) 2015-06-10
US20080046253A1 (en) 2008-02-21
MY151318A (en) 2014-05-15
KR20110069179A (ko) 2011-06-22
ES2658824T3 (es) 2018-03-12
BRPI0514650A (pt) 2008-06-24
AU2005280392A1 (en) 2006-03-09
CN102270453B (zh) 2014-06-18
BR122018077089B1 (pt) 2020-11-10
IL201469A (en) 2012-07-31
BRPI0514650B1 (pt) 2019-09-24
EP3940697A1 (en) 2022-01-19
TWI498882B (zh) 2015-09-01
US20080033731A1 (en) 2008-02-07
US20080040103A1 (en) 2008-02-14
AU2005280392B2 (en) 2011-02-24
IL181407A (en) 2011-10-31
KR20070051860A (ko) 2007-05-18
KR101253699B1 (ko) 2013-04-12
PL3940697T3 (pl) 2022-08-22
JP5038138B2 (ja) 2012-10-03
TW201316327A (zh) 2013-04-16
BR122018077099B1 (pt) 2020-11-10
US7945449B2 (en) 2011-05-17
AU2011200680A1 (en) 2011-03-10
EP1784818A2 (en) 2007-05-16
EP1784818B1 (en) 2017-11-15
CN102270453A (zh) 2011-12-07

Similar Documents

Publication Publication Date Title
IL214135A0 (en) Temporal envelope shaping for spatial audio coding using frequency domain wiener filtering
ZA200607661B (en) Coding of audio signals
IL190765A0 (en) Method for improved temporal and spatial shaping of multi-channel audio signals
EP1515583A4 (en) SPEAKER
EP1906706A4 (en) AUDIO DECODER
EP1838131A4 (en) SOUND RECEIVER
EP1897012A4 (en) IMMERSIVE AUDIO COMMUNICATION
EP1745573A4 (en) PROCESS FOR PREPARING 2-DEOXY-BETA-L-NUCLEOSIDES
GB2397441B (en) Noise filter
GB0513432D0 (en) Signal message compression
EP1511356A4 (en) LOUD SPEAKER
GB2403372B (en) Loudspeaker
GB2421140B (en) Stereo speaker system
EP1779656A4 (en) UPPER SCANNING OF TV AUDIO SIGNALS FOR CODING
GB0324051D0 (en) Loudspeaker
PL1877512T3 (pl) Sposób polepszania właściwości akustycznych
GB2403360B (en) Reduced complexity adaptive filter implementation
EP1855505A4 (en) sound receiver
EP1950735A4 (en) METHOD FOR MODULATING A HUMAN SPEECH FREQUENCY
GB2407934B (en) Audio communication unit
PL1604543T3 (pl) Głośnik
GB0428291D0 (en) Methods of regenerating NOx-Absorbent
GB0524758D0 (en) An enhanced filtering technique
GB0326721D0 (en) Loudspeaker
GB0409416D0 (en) Method of filtering