BRPI0418449A - método para supressão do ruìdo de um sinal de fala, codificador de fala, e, programa de computador - Google Patents

método para supressão do ruìdo de um sinal de fala, codificador de fala, e, programa de computador

Info

Publication number
BRPI0418449A
BRPI0418449A BRPI0418449-1A BRPI0418449A BRPI0418449A BR PI0418449 A BRPI0418449 A BR PI0418449A BR PI0418449 A BRPI0418449 A BR PI0418449A BR PI0418449 A BRPI0418449 A BR PI0418449A
Authority
BR
Brazil
Prior art keywords
frequency
speech signal
noise suppression
frequency bins
scaling gain
Prior art date
Application number
BRPI0418449-1A
Other languages
English (en)
Inventor
Milan Jelinek
Original Assignee
Nokia Corp
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 Nokia Corp filed Critical Nokia Corp
Publication of BRPI0418449A publication Critical patent/BRPI0418449A/pt

Links

Classifications

    • 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
    • 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
    • G10L19/00—Speech 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
    • G10L19/02—Speech 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Health & Medical Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Human Computer Interaction (AREA)
  • Signal Processing (AREA)
  • Computational Linguistics (AREA)
  • Quality & Reliability (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Noise Elimination (AREA)
  • Telephone Function (AREA)
  • Devices For Executing Special Programs (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)

Abstract

MéTODO PARA SUPRESSãO DO RUìDO DE UM SINAL DE FALA, CODIFICADOR DE FALA, E, PROGRAMA DE COMPUTADOR. Em um aspecto, a invenção provê um método para supressão de ruído de um sinal de fala que inclui, para um sinal de fala possuindo uma representação no domínio da freqüência dividida em uma pluralidade de segmentos da freqüência, determinar o valor do ganho escalar para ao menos alguns dos segmentos de freqüência e calcular os valores do ganho de escala suavizados. Calcular os valores do ganho de escala suavizados inclui, para ao menos alguns dos segmentos de freqüência, combinar o valor determinado atualmente do ganho escalar e o valor determinado previamente do ganho escalar suavizado. Em outro aspecto, o método divide uma pluralidade de segmentos de freqüência em um primeiro grupo de freqüências contíguos e em um segundo grupo de freqüências contíguos possuindo uma freqüência limite entre eles, onde a freqüência limite diferencia as técnicas de supressão de ruiído, e altera o valor da freqüência limite como uma função do conteúdo espectral do sinal de fala.
BRPI0418449-1A 2003-12-29 2004-12-29 método para supressão do ruìdo de um sinal de fala, codificador de fala, e, programa de computador BRPI0418449A (pt)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CA002454296A CA2454296A1 (en) 2003-12-29 2003-12-29 Method and device for speech enhancement in the presence of background noise
PCT/CA2004/002203 WO2005064595A1 (en) 2003-12-29 2004-12-29 Method and device for speech enhancement in the presence of background noise

Publications (1)

Publication Number Publication Date
BRPI0418449A true BRPI0418449A (pt) 2007-05-22

Family

ID=34683070

Family Applications (1)

Application Number Title Priority Date Filing Date
BRPI0418449-1A BRPI0418449A (pt) 2003-12-29 2004-12-29 método para supressão do ruìdo de um sinal de fala, codificador de fala, e, programa de computador

Country Status (18)

Country Link
US (1) US8577675B2 (pt)
EP (1) EP1700294B1 (pt)
JP (1) JP4440937B2 (pt)
KR (1) KR100870502B1 (pt)
CN (1) CN100510672C (pt)
AT (1) ATE441177T1 (pt)
AU (1) AU2004309431C1 (pt)
BR (1) BRPI0418449A (pt)
CA (2) CA2454296A1 (pt)
DE (1) DE602004022862D1 (pt)
ES (1) ES2329046T3 (pt)
MX (1) MXPA06007234A (pt)
MY (1) MY141447A (pt)
PT (1) PT1700294E (pt)
RU (1) RU2329550C2 (pt)
TW (1) TWI279776B (pt)
WO (1) WO2005064595A1 (pt)
ZA (1) ZA200606215B (pt)

Families Citing this family (95)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7113580B1 (en) * 2004-02-17 2006-09-26 Excel Switching Corporation Method and apparatus for performing conferencing services and echo suppression
EP1719114A2 (en) * 2004-02-18 2006-11-08 Philips Intellectual Property & Standards GmbH Method and system for generating training data for an automatic speech recogniser
DE102004049347A1 (de) * 2004-10-08 2006-04-20 Micronas Gmbh Schaltungsanordnung bzw. Verfahren für Sprache enthaltende Audiosignale
JP5129117B2 (ja) 2005-04-01 2013-01-23 クゥアルコム・インコーポレイテッド 音声信号の高帯域部分を符号化及び復号する方法及び装置
PL1875463T3 (pl) * 2005-04-22 2019-03-29 Qualcomm Incorporated Układy, sposoby i urządzenie do wygładzania współczynnika wzmocnienia
JP4765461B2 (ja) * 2005-07-27 2011-09-07 日本電気株式会社 雑音抑圧システムと方法及びプログラム
US7366658B2 (en) * 2005-12-09 2008-04-29 Texas Instruments Incorporated Noise pre-processor for enhanced variable rate speech codec
US7930178B2 (en) * 2005-12-23 2011-04-19 Microsoft Corporation Speech modeling and enhancement based on magnitude-normalized spectra
US9185487B2 (en) * 2006-01-30 2015-11-10 Audience, Inc. System and method for providing noise suppression utilizing null processing noise subtraction
US8949120B1 (en) 2006-05-25 2015-02-03 Audience, Inc. Adaptive noise cancelation
US7593535B2 (en) * 2006-08-01 2009-09-22 Dts, Inc. Neural network filtering techniques for compensating linear and non-linear distortion of an audio transducer
CN101246688B (zh) * 2007-02-14 2011-01-12 华为技术有限公司 一种对背景噪声信号进行编解码的方法、系统和装置
RU2440627C2 (ru) 2007-02-26 2012-01-20 Долби Лэборетериз Лайсенсинг Корпорейшн Повышение разборчивости речи в звукозаписи развлекательных программ
JP5186510B2 (ja) * 2007-03-19 2013-04-17 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 スピーチ明瞭度強化方法と装置
CN101320559B (zh) * 2007-06-07 2011-05-18 华为技术有限公司 一种声音激活检测装置及方法
RU2441286C2 (ru) * 2007-06-22 2012-01-27 Войсэйдж Корпорейшн Способ и устройство для обнаружения звуковой активности и классификации звуковых сигналов
ATE514163T1 (de) * 2007-09-12 2011-07-15 Dolby Lab Licensing Corp Spracherweiterung
US8892432B2 (en) * 2007-10-19 2014-11-18 Nec Corporation Signal processing system, apparatus and method used on the system, and program thereof
US8688441B2 (en) * 2007-11-29 2014-04-01 Motorola Mobility Llc Method and apparatus to facilitate provision and use of an energy value to determine a spectral envelope shape for out-of-signal bandwidth content
US8554550B2 (en) 2008-01-28 2013-10-08 Qualcomm Incorporated Systems, methods, and apparatus for context processing using multi resolution analysis
US8433582B2 (en) * 2008-02-01 2013-04-30 Motorola Mobility Llc Method and apparatus for estimating high-band energy in a bandwidth extension system
US20090201983A1 (en) * 2008-02-07 2009-08-13 Motorola, Inc. Method and apparatus for estimating high-band energy in a bandwidth extension system
CA2715432C (en) * 2008-03-05 2016-08-16 Voiceage Corporation System and method for enhancing a decoded tonal sound signal
CN101483042B (zh) * 2008-03-20 2011-03-30 华为技术有限公司 一种噪声生成方法以及噪声生成装置
US8606573B2 (en) * 2008-03-28 2013-12-10 Alon Konchitsky Voice recognition improved accuracy in mobile environments
KR101317813B1 (ko) * 2008-03-31 2013-10-15 (주)트란소노 노이지 음성 신호의 처리 방법과 이를 위한 장치 및 컴퓨터판독 가능한 기록매체
US9142221B2 (en) * 2008-04-07 2015-09-22 Cambridge Silicon Radio Limited Noise reduction
US8515097B2 (en) * 2008-07-25 2013-08-20 Broadcom Corporation Single microphone wind noise suppression
US9253568B2 (en) * 2008-07-25 2016-02-02 Broadcom Corporation Single-microphone wind noise suppression
US8463412B2 (en) * 2008-08-21 2013-06-11 Motorola Mobility Llc Method and apparatus to facilitate determining signal bounding frequencies
US8798776B2 (en) 2008-09-30 2014-08-05 Dolby International Ab Transcoding of audio metadata
US8463599B2 (en) * 2009-02-04 2013-06-11 Motorola Mobility Llc Bandwidth extension method and apparatus for a modified discrete cosine transform audio coder
EP2416315B1 (en) * 2009-04-02 2015-05-20 Mitsubishi Electric Corporation Noise suppression device
WO2011004299A1 (en) * 2009-07-07 2011-01-13 Koninklijke Philips Electronics N.V. Noise reduction of breathing signals
WO2011049515A1 (en) * 2009-10-19 2011-04-28 Telefonaktiebolaget Lm Ericsson (Publ) Method and voice activity detector for a speech encoder
EP2491559B1 (en) * 2009-10-19 2014-12-10 Telefonaktiebolaget LM Ericsson (publ) Method and background estimator for voice activity detection
US9838784B2 (en) 2009-12-02 2017-12-05 Knowles Electronics, Llc Directional audio capture
MY210338A (en) * 2010-01-19 2025-09-12 Dolby Int Ab Subband block based harmonic transposition
PL2532002T3 (pl) * 2010-03-09 2014-06-30 Fraunhofer Ges Forschung Urządzenie, sposób i program komputerowy do przetwarzania sygnału audio
US9558755B1 (en) 2010-05-20 2017-01-31 Knowles Electronics, Llc Noise suppression assisted automatic speech recognition
KR101173980B1 (ko) * 2010-10-18 2012-08-16 (주)트란소노 음성통신 기반 잡음 제거 시스템 및 그 방법
KR101176207B1 (ko) 2010-10-18 2012-08-28 (주)트란소노 음성통신 시스템 및 음성통신 방법
US8831937B2 (en) * 2010-11-12 2014-09-09 Audience, Inc. Post-noise suppression processing to improve voice quality
EP2458586A1 (en) * 2010-11-24 2012-05-30 Koninklijke Philips Electronics N.V. System and method for producing an audio signal
WO2012083555A1 (en) 2010-12-24 2012-06-28 Huawei Technologies Co., Ltd. Method and apparatus for adaptively detecting voice activity in input audio signal
KR20120080409A (ko) * 2011-01-07 2012-07-17 삼성전자주식회사 잡음 구간 판별에 의한 잡음 추정 장치 및 방법
EP2663903A1 (de) * 2011-01-11 2013-11-20 Siemens Aktiengesellschaft Verfahren und vorrichtung zur filterung eines signals und regeleinrichtung für einen prozess
US8650029B2 (en) * 2011-02-25 2014-02-11 Microsoft Corporation Leveraging speech recognizer feedback for voice activity detection
WO2012153165A1 (en) * 2011-05-06 2012-11-15 Nokia Corporation A pitch estimator
TWI459381B (zh) 2011-09-14 2014-11-01 Ind Tech Res Inst 語音增強方法
US9173025B2 (en) 2012-02-08 2015-10-27 Dolby Laboratories Licensing Corporation Combined suppression of noise, echo, and out-of-location signals
US8712076B2 (en) 2012-02-08 2014-04-29 Dolby Laboratories Licensing Corporation Post-processing including median filtering of noise suppression gains
US9666200B2 (en) * 2012-02-23 2017-05-30 Dolby International Ab Methods and systems for efficient recovery of high frequency audio content
CN103325380B (zh) 2012-03-23 2017-09-12 杜比实验室特许公司 用于信号增强的增益后处理
US9640194B1 (en) 2012-10-04 2017-05-02 Knowles Electronics, Llc Noise suppression for speech processing based on machine-learning mask estimation
WO2014081408A1 (en) 2012-11-20 2014-05-30 Unify Gmbh & Co. Kg Method, device, and system for audio data processing
CN105210148B (zh) 2012-12-21 2020-06-30 弗劳恩霍夫应用研究促进协会 用以在低比特率下模型化背景噪声的舒缓噪声添加技术
CN103886867B (zh) * 2012-12-21 2017-06-27 华为技术有限公司 一种噪声抑制装置及其方法
US9495951B2 (en) 2013-01-17 2016-11-15 Nvidia Corporation Real time audio echo and background noise reduction for a mobile device
SG11201505893TA (en) 2013-01-29 2015-08-28 Fraunhofer Ges Forschung Noise filling concept
US9536540B2 (en) 2013-07-19 2017-01-03 Knowles Electronics, Llc Speech signal separation and synthesis based on auditory scene analysis and speech modeling
JP6303340B2 (ja) * 2013-08-30 2018-04-04 富士通株式会社 音声処理装置、音声処理方法及び音声処理用コンピュータプログラム
KR20150032390A (ko) * 2013-09-16 2015-03-26 삼성전자주식회사 음성 명료도 향상을 위한 음성 신호 처리 장치 및 방법
DE102013111784B4 (de) 2013-10-25 2019-11-14 Intel IP Corporation Audioverarbeitungsvorrichtungen und audioverarbeitungsverfahren
US9449615B2 (en) * 2013-11-07 2016-09-20 Continental Automotive Systems, Inc. Externally estimated SNR based modifiers for internal MMSE calculators
US9449609B2 (en) * 2013-11-07 2016-09-20 Continental Automotive Systems, Inc. Accurate forward SNR estimation based on MMSE speech probability presence
US9449610B2 (en) * 2013-11-07 2016-09-20 Continental Automotive Systems, Inc. Speech probability presence modifier improving log-MMSE based noise suppression performance
CN104681034A (zh) 2013-11-27 2015-06-03 杜比实验室特许公司 音频信号处理
GB2523984B (en) 2013-12-18 2017-07-26 Cirrus Logic Int Semiconductor Ltd Processing received speech data
CN107293287B (zh) 2014-03-12 2021-10-26 华为技术有限公司 检测音频信号的方法和装置
US10176823B2 (en) * 2014-05-09 2019-01-08 Apple Inc. System and method for audio noise processing and noise reduction
KR20160000680A (ko) * 2014-06-25 2016-01-05 주식회사 더바인코퍼레이션 광대역 보코더용 휴대폰 명료도 향상장치와 이를 이용한 음성출력장치
MX2021010373A (es) 2014-07-29 2023-01-18 Ericsson Telefon Ab L M Estimación del ruido de fondo en las señales de audio.
CN106797512B (zh) 2014-08-28 2019-10-25 美商楼氏电子有限公司 多源噪声抑制的方法、系统和非瞬时计算机可读存储介质
WO2016040885A1 (en) 2014-09-12 2016-03-17 Audience, Inc. Systems and methods for restoration of speech components
US9947318B2 (en) * 2014-10-03 2018-04-17 2236008 Ontario Inc. System and method for processing an audio signal captured from a microphone
US9886966B2 (en) * 2014-11-07 2018-02-06 Apple Inc. System and method for improving noise suppression using logistic function and a suppression target value for automatic speech recognition
TWI569263B (zh) * 2015-04-30 2017-02-01 智原科技股份有限公司 聲頻訊號的訊號擷取方法與裝置
US20180350358A1 (en) * 2015-12-01 2018-12-06 Mitsubishi Electric Corporation Voice recognition device, voice emphasis device, voice recognition method, voice emphasis method, and navigation system
US9820042B1 (en) 2016-05-02 2017-11-14 Knowles Electronics, Llc Stereo separation and directional suppression with omni-directional microphones
CN108022595A (zh) * 2016-10-28 2018-05-11 电信科学技术研究院 一种语音信号降噪方法和用户终端
CN106782504B (zh) * 2016-12-29 2019-01-22 百度在线网络技术（北京）有限公司 语音识别方法和装置
CN111183476B (zh) * 2017-10-06 2024-03-22 索尼欧洲有限公司 基于子窗口序列内的rms功率的音频文件包络
US10771621B2 (en) * 2017-10-31 2020-09-08 Cisco Technology, Inc. Acoustic echo cancellation based sub band domain active speaker detection for audio and video conferencing applications
RU2701120C1 (ru) * 2018-05-14 2019-09-24 Федеральное государственное казенное военное образовательное учреждение высшего образования "Военный учебно-научный центр Военно-Морского Флота "Военно-морская академия имени Адмирала флота Советского Союза Н.Г. Кузнецова" Устройство для обработки речевого сигнала
US10681458B2 (en) * 2018-06-11 2020-06-09 Cirrus Logic, Inc. Techniques for howling detection
US12272376B2 (en) 2019-08-27 2025-04-08 Dolby Laboratories Licensing Corporation Dialog enhancement using adaptive smoothing which depends exponentially on a smoothing factor
KR102327441B1 (ko) * 2019-09-20 2021-11-17 엘지전자 주식회사 인공지능 장치
US11217262B2 (en) * 2019-11-18 2022-01-04 Google Llc Adaptive energy limiting for transient noise suppression
US11264015B2 (en) 2019-11-21 2022-03-01 Bose Corporation Variable-time smoothing for steady state noise estimation
US11374663B2 (en) * 2019-11-21 2022-06-28 Bose Corporation Variable-frequency smoothing
CN111429932A (zh) * 2020-06-10 2020-07-17 浙江远传信息技术股份有限公司 语音降噪方法、装置、设备及介质
CN112634929B (zh) * 2020-12-16 2024-07-23 普联国际有限公司 一种语音增强方法、装置及存储介质
CN116913306B (zh) * 2023-08-31 2025-05-16 重庆赛力斯凤凰智创科技有限公司 一种语音增强方法、装置及电子设备
CN120564745B (zh) * 2025-07-31 2025-09-26 西安赛普特信息科技有限公司 一种机载高可靠智能语音通话降静噪方法

Family Cites Families (34)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57161800A (en) * 1981-03-30 1982-10-05 Toshiyuki Sakai Voice information filter
US4630305A (en) * 1985-07-01 1986-12-16 Motorola, Inc. Automatic gain selector for a noise suppression system
AU633673B2 (en) * 1990-01-18 1993-02-04 Matsushita Electric Industrial Co., Ltd. Signal processing device
US5432859A (en) * 1993-02-23 1995-07-11 Novatel Communications Ltd. Noise-reduction system
JP3453898B2 (ja) * 1995-02-17 2003-10-06 ソニー株式会社 音声信号の雑音低減方法及び装置
FI100840B (fi) * 1995-12-12 1998-02-27 Nokia Mobile Phones Ltd Kohinanvaimennin ja menetelmä taustakohinan vaimentamiseksi kohinaises ta puheesta sekä matkaviestin
JP3297307B2 (ja) * 1996-06-14 2002-07-02 沖電気工業株式会社 背景雑音消去装置
US6098038A (en) * 1996-09-27 2000-08-01 Oregon Graduate Institute Of Science & Technology Method and system for adaptive speech enhancement using frequency specific signal-to-noise ratio estimates
US6097820A (en) * 1996-12-23 2000-08-01 Lucent Technologies Inc. System and method for suppressing noise in digitally represented voice signals
US6456965B1 (en) * 1997-05-20 2002-09-24 Texas Instruments Incorporated Multi-stage pitch and mixed voicing estimation for harmonic speech coders
US6044341A (en) * 1997-07-16 2000-03-28 Olympus Optical Co., Ltd. Noise suppression apparatus and recording medium recording processing program for performing noise removal from voice
US6163608A (en) * 1998-01-09 2000-12-19 Ericsson Inc. Methods and apparatus for providing comfort noise in communications systems
US20020002455A1 (en) 1998-01-09 2002-01-03 At&T Corporation Core estimator and adaptive gains from signal to noise ratio in a hybrid speech enhancement system
US6088668A (en) * 1998-06-22 2000-07-11 D.S.P.C. Technologies Ltd. Noise suppressor having weighted gain smoothing
US7209567B1 (en) * 1998-07-09 2007-04-24 Purdue Research Foundation Communication system with adaptive noise suppression
US6351731B1 (en) * 1998-08-21 2002-02-26 Polycom, Inc. Adaptive filter featuring spectral gain smoothing and variable noise multiplier for noise reduction, and method therefor
US7072832B1 (en) * 1998-08-24 2006-07-04 Mindspeed Technologies, Inc. System for speech encoding having an adaptive encoding arrangement
US6233549B1 (en) * 1998-11-23 2001-05-15 Qualcomm, Inc. Low frequency spectral enhancement system and method
US6363345B1 (en) * 1999-02-18 2002-03-26 Andrea Electronics Corporation System, method and apparatus for cancelling noise
US6618701B2 (en) * 1999-04-19 2003-09-09 Motorola, Inc. Method and system for noise suppression using external voice activity detection
JP4242516B2 (ja) 1999-07-26 2009-03-25 パナソニック株式会社 サブバンド符号化方式
FI116643B (fi) * 1999-11-15 2006-01-13 Nokia Corp Kohinan vaimennus
CA2290037A1 (en) * 1999-11-18 2001-05-18 Voiceage Corporation Gain-smoothing amplifier device and method in codecs for wideband speech and audio signals
US6366880B1 (en) * 1999-11-30 2002-04-02 Motorola, Inc. Method and apparatus for suppressing acoustic background noise in a communication system by equaliztion of pre-and post-comb-filtered subband spectral energies
US6704711B2 (en) * 2000-01-28 2004-03-09 Telefonaktiebolaget Lm Ericsson (Publ) System and method for modifying speech signals
US7058572B1 (en) * 2000-01-28 2006-06-06 Nortel Networks Limited Reducing acoustic noise in wireless and landline based telephony
US6898566B1 (en) * 2000-08-16 2005-05-24 Mindspeed Technologies, Inc. Using signal to noise ratio of a speech signal to adjust thresholds for extracting speech parameters for coding the speech signal
US6862567B1 (en) * 2000-08-30 2005-03-01 Mindspeed Technologies, Inc. Noise suppression in the frequency domain by adjusting gain according to voicing parameters
JP2002149200A (ja) * 2000-08-31 2002-05-24 Matsushita Electric Ind Co Ltd 音声処理装置及び音声処理方法
US6947888B1 (en) * 2000-10-17 2005-09-20 Qualcomm Incorporated Method and apparatus for high performance low bit-rate coding of unvoiced speech
US6925435B1 (en) 2000-11-27 2005-08-02 Mindspeed Technologies, Inc. Method and apparatus for improved noise reduction in a speech encoder
JP4282227B2 (ja) * 2000-12-28 2009-06-17 日本電気株式会社 ノイズ除去の方法及び装置
US7155385B2 (en) * 2002-05-16 2006-12-26 Comerica Bank, As Administrative Agent Automatic gain control for adjusting gain during non-speech portions
US7492889B2 (en) * 2004-04-23 2009-02-17 Acoustic Technologies, Inc. Noise suppression based on bark band wiener filtering and modified doblinger noise estimate

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Publication number Publication date
AU2004309431B2 (en) 2008-10-02
EP1700294A4 (en) 2007-02-28
EP1700294B1 (en) 2009-08-26
CA2550905C (en) 2010-12-14
ZA200606215B (en) 2007-11-28
CA2454296A1 (en) 2005-06-29
AU2004309431C1 (en) 2009-03-19
TWI279776B (en) 2007-04-21
MXPA06007234A (es) 2006-08-18
TW200531006A (en) 2005-09-16
US20050143989A1 (en) 2005-06-30
JP4440937B2 (ja) 2010-03-24
MY141447A (en) 2010-04-30
RU2006126530A (ru) 2008-02-10
ATE441177T1 (de) 2009-09-15
AU2004309431A1 (en) 2005-07-14
ES2329046T3 (es) 2009-11-20
KR100870502B1 (ko) 2008-11-25
RU2329550C2 (ru) 2008-07-20
HK1099946A1 (zh) 2007-08-31
EP1700294A1 (en) 2006-09-13
CN100510672C (zh) 2009-07-08
CA2550905A1 (en) 2005-07-14
CN1918461A (zh) 2007-02-21
WO2005064595A1 (en) 2005-07-14
US8577675B2 (en) 2013-11-05
PT1700294E (pt) 2009-09-28
KR20060128983A (ko) 2006-12-14
JP2007517249A (ja) 2007-06-28
DE602004022862D1 (de) 2009-10-08

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