WO2007107670A3 - Procede de post-traitement d'un signal dans un decodeur audio - Google Patents

Procede de post-traitement d'un signal dans un decodeur audio Download PDF

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Publication number
WO2007107670A3
WO2007107670A3 PCT/FR2007/050959 FR2007050959W WO2007107670A3 WO 2007107670 A3 WO2007107670 A3 WO 2007107670A3 FR 2007050959 W FR2007050959 W FR 2007050959W WO 2007107670 A3 WO2007107670 A3 WO 2007107670A3
Authority
WO
WIPO (PCT)
Prior art keywords
signal
post
audio decoder
temporal
frequential
Prior art date
Application number
PCT/FR2007/050959
Other languages
English (en)
Other versions
WO2007107670A2 (fr
Inventor
Stephane Ragot
Cyril Guillaume
Original Assignee
France Telecom
Stephane Ragot
Cyril Guillaume
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, Stephane Ragot, Cyril Guillaume filed Critical France Telecom
Priority to JP2009500896A priority Critical patent/JP5457171B2/ja
Priority to KR1020087025600A priority patent/KR101373207B1/ko
Priority to CN200780010053XA priority patent/CN101405792B/zh
Priority to US12/225,462 priority patent/US20090299755A1/en
Priority to EP07731774A priority patent/EP2005424A2/fr
Publication of WO2007107670A2 publication Critical patent/WO2007107670A2/fr
Publication of WO2007107670A3 publication Critical patent/WO2007107670A3/fr

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
    • 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
    • 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
    • G10L19/26—Pre-filtering or post-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
    • 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
    • G10L21/0316—Speech enhancement, e.g. noise reduction or echo cancellation by changing the amplitude
    • G10L21/0364—Speech enhancement, e.g. noise reduction or echo cancellation by changing the amplitude for improving intelligibility

Landscapes

  • Engineering & Computer Science (AREA)
  • Computational Linguistics (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Quality & Reliability (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)

Abstract

L'invention traite d'un procédé de post-traitement, dans un décodeur audio, d'un signal reconstruit par mises en forme temporelle et fréquentielle (805,807) d'un signal d'excitation obtenu à partir d'au moins un paramètre estimé dans une première bande de fréquence, lesdites mises en forme temporelle et fréquentielle étant réalisées à partir, au moins, d'une enveloppe temporelle et d'une enveloppe fréquentielle reçues et décodées (801, 802) dans une deuxième bande de fréquence. Le procédé est tel qu'il comprend, après lesdites mises en forme (805,807), les étapes consistant à comparer l'amplitude dudit signal reconstruit à ladite enveloppe temporelle reçue et décodée (σ), et, en cas de dépassement d'au moins un seuil fonction de ladite enveloppe temporelle, à appliquer audit signal reconstruit une compression d'amplitude. L'invention se rapporte à un module de post traitement apte à mettre en œuvre le procédé selon l'invention ainsi qu'à un décodeur audio. Application à la transmission et au stockage des signaux numériques tels que les signaux audio-fréquences : parole, musique, etc.
PCT/FR2007/050959 2006-03-20 2007-03-20 Procede de post-traitement d'un signal dans un decodeur audio WO2007107670A2 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP2009500896A JP5457171B2 (ja) 2006-03-20 2007-03-20 オーディオデコーダ内で信号を後処理する方法
KR1020087025600A KR101373207B1 (ko) 2006-03-20 2007-03-20 오디오 디코더에서 신호를 사후-프로세싱하는 방법
CN200780010053XA CN101405792B (zh) 2006-03-20 2007-03-20 用于在音频解码器中对信号进行后处理的方法
US12/225,462 US20090299755A1 (en) 2006-03-20 2007-03-20 Method for Post-Processing a Signal in an Audio Decoder
EP07731774A EP2005424A2 (fr) 2006-03-20 2007-03-20 Procede de post-traitement d'un signal dans un decodeur audio

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0650954 2006-03-20
FR0650954 2006-03-20

Publications (2)

Publication Number Publication Date
WO2007107670A2 WO2007107670A2 (fr) 2007-09-27
WO2007107670A3 true WO2007107670A3 (fr) 2007-11-08

Family

ID=37500047

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FR2007/050959 WO2007107670A2 (fr) 2006-03-20 2007-03-20 Procede de post-traitement d'un signal dans un decodeur audio

Country Status (6)

Country Link
US (1) US20090299755A1 (fr)
EP (1) EP2005424A2 (fr)
JP (1) JP5457171B2 (fr)
KR (1) KR101373207B1 (fr)
CN (1) CN101405792B (fr)
WO (1) WO2007107670A2 (fr)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008022181A2 (fr) * 2006-08-15 2008-02-21 Broadcom Corporation Mise à jour des états de décodeur après un masquage de perte de paquet
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
EP2362375A1 (fr) 2010-02-26 2011-08-31 Fraunhofer-Gesellschaft zur Förderung der Angewandten Forschung e.V. Dispositif et procédé de modification d'un signal audio par mise en forme de son envelope
CN103069484B (zh) * 2010-04-14 2014-10-08 华为技术有限公司 时/频二维后处理
JP5997592B2 (ja) 2012-04-27 2016-09-28 株式会社Ｎｔｔドコモ 音声復号装置
EP3503095A1 (fr) 2013-08-28 2019-06-26 Dolby Laboratories Licensing Corp. Amélioration hybride de la parole codée du front d'onde et de paramètres
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

Citations (4)

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Publication number Priority date Publication date Assignee Title
GB2351889A (en) * 1999-07-06 2001-01-10 Ericsson Telefon Ab L M Speech band expansion
WO2001022401A1 (fr) * 1999-09-20 2001-03-29 Koninklijke Philips Electronics N.V. Circuit de traitement pour corriger les signaux audio, recepteur, systeme de communications, appareil mobile et procede correspondant
US20030187663A1 (en) * 2002-03-28 2003-10-02 Truman Michael Mead Broadband frequency translation for high frequency regeneration
WO2005078706A1 (fr) * 2004-02-18 2005-08-25 Voiceage Corporation Procedes et dispositifs pour l'accentuation a basse frequence lors de la compression audio basee sur les technologies acelp/tcx (codage a prediction lineaire a excitation de code/codage par transformee d'excitation)

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JPH07193548A (ja) * 1993-12-25 1995-07-28 Sony Corp 雑音低減処理方法
US5945932A (en) * 1997-10-30 1999-08-31 Audiotrack Corporation Technique for embedding a code in an audio signal and for detecting the embedded code
JP3810257B2 (ja) * 2000-06-30 2006-08-16 松下電器産業株式会社 音声帯域拡張装置及び音声帯域拡張方法
SE0004818D0 (sv) * 2000-12-22 2000-12-22 Coding Technologies Sweden Ab Enhancing source coding systems by adaptive transposition
US7590525B2 (en) * 2001-08-17 2009-09-15 Broadcom Corporation Frame erasure concealment for predictive speech coding based on extrapolation of speech waveform
US7173966B2 (en) * 2001-08-31 2007-02-06 Broadband Physics, Inc. Compensation for non-linear distortion in a modem receiver
US6988066B2 (en) * 2001-10-04 2006-01-17 At&T Corp. Method of bandwidth extension for narrow-band speech
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2351889A (en) * 1999-07-06 2001-01-10 Ericsson Telefon Ab L M Speech band expansion
WO2001022401A1 (fr) * 1999-09-20 2001-03-29 Koninklijke Philips Electronics N.V. Circuit de traitement pour corriger les signaux audio, recepteur, systeme de communications, appareil mobile et procede correspondant
US20030187663A1 (en) * 2002-03-28 2003-10-02 Truman Michael Mead Broadband frequency translation for high frequency regeneration
WO2005078706A1 (fr) * 2004-02-18 2005-08-25 Voiceage Corporation Procedes et dispositifs pour l'accentuation a basse frequence lors de la compression audio basee sur les technologies acelp/tcx (codage a prediction lineaire a excitation de code/codage par transformee d'excitation)

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Also Published As

Publication number Publication date
KR20080109038A (ko) 2008-12-16
CN101405792A (zh) 2009-04-08
US20090299755A1 (en) 2009-12-03
KR101373207B1 (ko) 2014-03-12
JP5457171B2 (ja) 2014-04-02
JP2009530679A (ja) 2009-08-27
CN101405792B (zh) 2012-09-05
EP2005424A2 (fr) 2008-12-24
WO2007107670A2 (fr) 2007-09-27

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