WO2007096552A3 - Procede de discrimination et d'attenuation fiabilisees des echos d'un signal numerique dans un decodeur et dispositif correspondant - Google Patents

Procede de discrimination et d'attenuation fiabilisees des echos d'un signal numerique dans un decodeur et dispositif correspondant Download PDF

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Publication number
WO2007096552A3
WO2007096552A3 PCT/FR2007/050786 FR2007050786W WO2007096552A3 WO 2007096552 A3 WO2007096552 A3 WO 2007096552A3 FR 2007050786 W FR2007050786 W FR 2007050786W WO 2007096552 A3 WO2007096552 A3 WO 2007096552A3
Authority
WO
WIPO (PCT)
Prior art keywords
echoes
attenuation
echo
existence
false alarm
Prior art date
Application number
PCT/FR2007/050786
Other languages
English (en)
Other versions
WO2007096552A2 (fr
Inventor
Balazs Kovesi
Guyader Alain Le
Original Assignee
France Telecom
Balazs Kovesi
Guyader Alain Le
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 France Telecom, Balazs Kovesi, Guyader Alain Le filed Critical France Telecom
Priority to JP2008554821A priority Critical patent/JP5202335B2/ja
Priority to US12/224,137 priority patent/US8756054B2/en
Priority to CN2007800060231A priority patent/CN101390159B/zh
Priority to AT07731611T priority patent/ATE520123T1/de
Priority to EP07731611A priority patent/EP2002428B1/fr
Publication of WO2007096552A2 publication Critical patent/WO2007096552A2/fr
Publication of WO2007096552A3 publication Critical patent/WO2007096552A3/fr
Priority to KR1020087023143A priority patent/KR101376762B1/ko

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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
    • G10L19/04—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 predictive techniques
    • G10L19/16—Vocoder architecture
    • G10L19/18—Vocoders using multiple modes
    • G10L19/24—Variable rate codecs, e.g. for generating different qualities using a scalable representation such as hierarchical encoding or layered encoding
    • 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
    • G10L19/04—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 predictive techniques
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Human Computer Interaction (AREA)
  • Computational Linguistics (AREA)
  • Health & Medical Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Quality & Reliability (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)

Abstract

L'invention concerne un procédé et un dispositif de discrimination et d'atténuation des échos d'un signal audionumérique engendré à partir d'un codage par transformée, dans lesquels pour chaque trame courante du signal, on compare (A) en temps réel, dans au moins une bande de fréquences une variable issue d'une caractéristique du signal générateur d'écho à celle du signal non générateur d'écho à une valeur de seuil, et on conclut (B) à l'existence ou à la non existence (C) d'un écho issu du codage par transformée, on discrimine l'existence d'écho et on définit (D) une zone de fausse alarme dans les parties du signal audionumérique à haute énergie, on détermine un traitement initial et on atténue les échos (E) dans les parties complémentaires de la zone de fausse alarme à basse énergie et on inhibe (F) l'atténuation des échos dans la zone de fausse alarme. Application à la technologie des codeurs - décodeurs notamment hiérarchiques.
PCT/FR2007/050786 2006-02-20 2007-02-13 Procede de discrimination et d'attenuation fiabilisees des echos d'un signal numerique dans un decodeur et dispositif correspondant WO2007096552A2 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
JP2008554821A JP5202335B2 (ja) 2006-02-20 2007-02-13 デコーダおよび対応するデバイス中のディジタル信号のエコーの訓練された弁別および減衰のための方法
US12/224,137 US8756054B2 (en) 2006-02-20 2007-02-13 Method for trained discrimination and attenuation of echoes of a digital signal in a decoder and corresponding device
CN2007800060231A CN101390159B (zh) 2006-02-20 2007-02-13 识别和衰减变换编码生成的数字信号中回声的方法和设备
AT07731611T ATE520123T1 (de) 2006-02-20 2007-02-13 Verfahren zur trainierten diskrimination und dämpfung von echos eines digitalsignals in einem decoder und entsprechende einrichtung
EP07731611A EP2002428B1 (fr) 2006-02-20 2007-02-13 Procede de discrimination et d'attenuation fiabilisees des echos d'un signal numerique dans un decodeur et dispositif correspondant
KR1020087023143A KR101376762B1 (ko) 2006-02-20 2008-09-22 디코더 및 대응 디바이스에서 디지털 신호의 반향들의 안전한 구별과 감쇠를 위한 방법

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0601466A FR2897733A1 (fr) 2006-02-20 2006-02-20 Procede de discrimination et d'attenuation fiabilisees des echos d'un signal numerique dans un decodeur et dispositif correspondant
FR0601466 2006-02-20

Publications (2)

Publication Number Publication Date
WO2007096552A2 WO2007096552A2 (fr) 2007-08-30
WO2007096552A3 true WO2007096552A3 (fr) 2007-10-18

Family

ID=36968787

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FR2007/050786 WO2007096552A2 (fr) 2006-02-20 2007-02-13 Procede de discrimination et d'attenuation fiabilisees des echos d'un signal numerique dans un decodeur et dispositif correspondant

Country Status (8)

Country Link
US (1) US8756054B2 (fr)
EP (1) EP2002428B1 (fr)
JP (1) JP5202335B2 (fr)
KR (1) KR101376762B1 (fr)
CN (1) CN101390159B (fr)
AT (1) ATE520123T1 (fr)
FR (1) FR2897733A1 (fr)
WO (1) WO2007096552A2 (fr)

Cited By (6)

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US9047859B2 (en) 2011-02-14 2015-06-02 Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V. Apparatus and method for encoding and decoding an audio signal using an aligned look-ahead portion
US9384739B2 (en) 2011-02-14 2016-07-05 Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V. Apparatus and method for error concealment in low-delay unified speech and audio coding
US9536530B2 (en) 2011-02-14 2017-01-03 Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V. Information signal representation using lapped transform
US9583110B2 (en) 2011-02-14 2017-02-28 Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V. Apparatus and method for processing a decoded audio signal in a spectral domain
US9595262B2 (en) 2011-02-14 2017-03-14 Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V. Linear prediction based coding scheme using spectral domain noise shaping
US9595263B2 (en) 2011-02-14 2017-03-14 Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V. Encoding and decoding of pulse positions of tracks of an audio signal

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WO2008108701A1 (fr) * 2007-03-02 2008-09-12 Telefonaktiebolaget Lm Ericsson (Publ) Post-filtre pour des codecs en couche
US8463603B2 (en) 2008-09-06 2013-06-11 Huawei Technologies Co., Ltd. Spectral envelope coding of energy attack signal
RU2481650C2 (ru) * 2008-09-17 2013-05-10 Франс Телеком Ослабление опережающих эхо-сигналов в цифровом звуковом сигнале
EP3422346B1 (fr) 2010-07-02 2020-04-22 Dolby International AB Codage audio avec décision concernant l'application d'un postfiltre en décodage
JP5969513B2 (ja) 2011-02-14 2016-08-17 フラウンホーファー−ゲゼルシャフト・ツール・フェルデルング・デル・アンゲヴァンテン・フォルシュング・アインゲトラーゲネル・フェライン 不活性相の間のノイズ合成を用いるオーディオコーデック
PT2676270T (pt) 2011-02-14 2017-05-02 Fraunhofer Ges Forschung Codificação de uma parte de um sinal de áudio utilizando uma deteção de transiente e um resultado de qualidade
MX2013009305A (es) 2011-02-14 2013-10-03 Fraunhofer Ges Forschung Generacion de ruido en codecs de audio.
TWI488176B (zh) 2011-02-14 2015-06-11 Fraunhofer Ges Forschung 音訊信號音軌脈衝位置之編碼與解碼技術
CN102800317B (zh) * 2011-05-25 2014-09-17 华为技术有限公司 信号分类方法及设备、编解码方法及设备
KR20140085453A (ko) * 2011-10-27 2014-07-07 엘지전자 주식회사 음성 신호 부호화 방법 및 복호화 방법과 이를 이용하는 장치
US8712076B2 (en) 2012-02-08 2014-04-29 Dolby Laboratories Licensing Corporation Post-processing including median filtering of noise suppression gains
US9173025B2 (en) 2012-02-08 2015-10-27 Dolby Laboratories Licensing Corporation Combined suppression of noise, echo, and out-of-location signals
FR2992766A1 (fr) * 2012-06-29 2014-01-03 France Telecom Attenuation efficace de pre-echos dans un signal audionumerique
FR3000328A1 (fr) * 2012-12-21 2014-06-27 France Telecom Attenuation efficace de pre-echos dans un signal audionumerique
FR3003683A1 (fr) * 2013-03-25 2014-09-26 France Telecom Mixage optimise de flux audio codes selon un codage par sous-bandes
FR3003682A1 (fr) * 2013-03-25 2014-09-26 France Telecom Mixage partiel optimise de flux audio codes selon un codage par sous-bandes
GB201401689D0 (en) * 2014-01-31 2014-03-19 Microsoft Corp Audio signal processing
FR3024581A1 (fr) * 2014-07-29 2016-02-05 Orange Determination d'un budget de codage d'une trame de transition lpd/fd
FR3025923A1 (fr) * 2014-09-12 2016-03-18 Orange Discrimination et attenuation de pre-echos dans un signal audionumerique
EP3382700A1 (fr) * 2017-03-31 2018-10-03 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Appareil et procede de post-traitement d'un signal audio à l'aide d'une détection d'emplacements transitoires
CN107595311A (zh) * 2017-08-30 2018-01-19 沈阳东软医疗系统有限公司 双能量ct图像处理方法、装置以及设备
US10984808B2 (en) * 2019-07-09 2021-04-20 Blackberry Limited Method for multi-stage compression in sub-band processing

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WO2006114368A1 (fr) * 2005-04-28 2006-11-02 Siemens Aktiengesellschaft Procede et dispositif pour attenuer le bruit

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9047859B2 (en) 2011-02-14 2015-06-02 Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V. Apparatus and method for encoding and decoding an audio signal using an aligned look-ahead portion
US9384739B2 (en) 2011-02-14 2016-07-05 Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V. Apparatus and method for error concealment in low-delay unified speech and audio coding
US9536530B2 (en) 2011-02-14 2017-01-03 Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V. Information signal representation using lapped transform
US9583110B2 (en) 2011-02-14 2017-02-28 Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V. Apparatus and method for processing a decoded audio signal in a spectral domain
US9595262B2 (en) 2011-02-14 2017-03-14 Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V. Linear prediction based coding scheme using spectral domain noise shaping
US9595263B2 (en) 2011-02-14 2017-03-14 Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V. Encoding and decoding of pulse positions of tracks of an audio signal

Also Published As

Publication number Publication date
ATE520123T1 (de) 2011-08-15
WO2007096552A2 (fr) 2007-08-30
CN101390159B (zh) 2012-07-04
FR2897733A1 (fr) 2007-08-24
US8756054B2 (en) 2014-06-17
EP2002428B1 (fr) 2011-08-10
EP2002428A2 (fr) 2008-12-17
KR20080103088A (ko) 2008-11-26
CN101390159A (zh) 2009-03-18
JP2009527773A (ja) 2009-07-30
JP5202335B2 (ja) 2013-06-05
KR101376762B1 (ko) 2014-03-21
US20090313009A1 (en) 2009-12-17

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