CA2482427C - Dispositif et procede pour coder un signal audio a temps discret et dispositif et procede pour decoder des donnees audio codees - Google Patents

Dispositif et procede pour coder un signal audio a temps discret et dispositif et procede pour decoder des donnees audio codees Download PDF

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Publication number
CA2482427C
CA2482427C CA002482427A CA2482427A CA2482427C CA 2482427 C CA2482427 C CA 2482427C CA 002482427 A CA002482427 A CA 002482427A CA 2482427 A CA2482427 A CA 2482427A CA 2482427 C CA2482427 C CA 2482427C
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Prior art keywords
block
integer
difference
spectral values
quantization
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Expired - Lifetime
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CA002482427A
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CA2482427A1 (fr
Inventor
Ralf Geiger
Thomas Sporer
Karlheinz Brandenburg
Jurgen Herre
Jurgen Koller
Joachim Deguara
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Fraunhofer Gesellschaft zur Forderung der Angewandten Forschung eV
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Fraunhofer Gesellschaft zur Forderung der Angewandten Forschung eV
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    • 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
    • G10L19/0212—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 using orthogonal transformation
    • 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
    • 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
    • G10L19/0017—Lossless audio signal coding; Perfect reconstruction of coded audio signal by transmission of coding error
    • 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
    • G10L19/032—Quantisation or dequantisation of spectral components

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Computational Linguistics (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Human Computer Interaction (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)

Abstract

Selon la présente invention, un signal audio à temps discret est traité (52) afin de fournir (52) un bloc de quantification avec des valeurs spectrales quantifiées. Une représentation spectrale en nombres entiers est produite à partir du signal audio à temps discret, par utilisation d'un algorithme de transformation (56) en nombres entiers. Le bloc de quantification qui a été produit à l'aide d'un modèle psychoacoustique (54) est inversement quantifié et arrondi (58) afin d'établir une différence entre les valeurs spectrales en nombres entiers et les valeurs spectrales arrondies inversement quantifiées. Le bloc de quantification seul fournit, après le décodage, un signal audio à codage/décodage psychoacoustique avec pertes, alors que le bloc de quantification avec le bloc de combinaison fournit, lors du décodage, un signal audio codé ou à nouveau décodé, sans perte ou quasiment sans perte. La production du signal différentiel dans le domaine fréquentiel permet d'obtenir une structure de codeur/décodeur simplifiée.
CA002482427A 2002-04-18 2002-12-02 Dispositif et procede pour coder un signal audio a temps discret et dispositif et procede pour decoder des donnees audio codees Expired - Lifetime CA2482427C (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10217297.8 2002-04-18
DE10217297A DE10217297A1 (de) 2002-04-18 2002-04-18 Vorrichtung und Verfahren zum Codieren eines zeitdiskreten Audiosignals und Vorrichtung und Verfahren zum Decodieren von codierten Audiodaten
PCT/EP2002/013623 WO2003088212A1 (fr) 2002-04-18 2002-12-02 Dispositif et procede pour coder un signal audio a temps discret et dispositif et procede pour decoder des donnees audio codees

Publications (2)

Publication Number Publication Date
CA2482427A1 CA2482427A1 (fr) 2003-10-23
CA2482427C true CA2482427C (fr) 2010-01-19

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Family Applications (1)

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CA002482427A Expired - Lifetime CA2482427C (fr) 2002-04-18 2002-12-02 Dispositif et procede pour coder un signal audio a temps discret et dispositif et procede pour decoder des donnees audio codees

Country Status (9)

Country Link
EP (1) EP1495464B1 (fr)
JP (1) JP4081447B2 (fr)
KR (1) KR100892152B1 (fr)
CN (1) CN1258172C (fr)
AT (1) ATE305655T1 (fr)
CA (1) CA2482427C (fr)
DE (2) DE10217297A1 (fr)
HK (1) HK1077391A1 (fr)
WO (1) WO2003088212A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11817111B2 (en) 2018-04-11 2023-11-14 Dolby Laboratories Licensing Corporation Perceptually-based loss functions for audio encoding and decoding based on machine learning

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KR101141247B1 (ko) * 2003-10-10 2012-05-04 에이전시 포 사이언스, 테크놀로지 앤드 리서치 디지털 신호를 확장성 비트스트림으로 인코딩하는 방법；확장성 비트스트림을 디코딩하는 방법
DE102004007200B3 (de) * 2004-02-13 2005-08-11 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Audiocodierung
DE102004007184B3 (de) * 2004-02-13 2005-09-22 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Verfahren und Vorrichtung zum Quantisieren eines Informationssignals
DE102004059979B4 (de) 2004-12-13 2007-11-22 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Vorrichtung und Verfahren zur Berechnung einer Signalenergie eines Informationssignals
US8494667B2 (en) 2005-06-30 2013-07-23 Lg Electronics Inc. Apparatus for encoding and decoding audio signal and method thereof
ATE455348T1 (de) 2005-08-30 2010-01-15 Lg Electronics Inc Vorrichtung und verfahren zur dekodierung eines audiosignals
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US7653533B2 (en) 2005-10-24 2010-01-26 Lg Electronics Inc. Removing time delays in signal paths
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EP1883067A1 (fr) * 2006-07-24 2008-01-30 Deutsche Thomson-Brandt Gmbh Méthode et appareil pour l'encodage sans perte d'un signal source, utilisant un flux de données encodées avec pertes et un flux de données d'extension sans perte.
EP1903559A1 (fr) 2006-09-20 2008-03-26 Deutsche Thomson-Brandt Gmbh Procédé et dispositif de transcodage de signaux audio
DE102006051673A1 (de) * 2006-11-02 2008-05-15 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Vorrichtung und Verfahren zum Nachbearbeiten von Spektralwerten und Encodierer und Decodierer für Audiosignale
DE102007003187A1 (de) * 2007-01-22 2008-10-02 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Vorrichtung und Verfahren zum Erzeugen eines zu sendenden Signals oder eines decodierten Signals
KR101149448B1 (ko) * 2007-02-12 2012-05-25 삼성전자주식회사 오디오 부호화 및 복호화 장치와 그 방법
EP2015293A1 (fr) * 2007-06-14 2009-01-14 Deutsche Thomson OHG Procédé et appareil pour coder et décoder un signal audio par résolution temporelle à commutation adaptative dans le domaine spectral
MX2010001763A (es) * 2007-08-27 2010-03-10 Ericsson Telefon Ab L M Analisis/sintesis espectral de baja complejidad utilizando la resolucion temporal seleccionable.
EP2063417A1 (fr) * 2007-11-23 2009-05-27 Deutsche Thomson OHG Formage de l'erreur d'arrondi pour le codage et décodage basés sur des transformées entières
EP2144230A1 (fr) 2008-07-11 2010-01-13 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Schéma de codage/décodage audio à taux bas de bits disposant des commutateurs en cascade
CN102177426B (zh) * 2008-10-08 2014-11-05 弗兰霍菲尔运输应用研究公司 多分辨率切换音频编码/解码方案
CN102918590B (zh) * 2010-03-31 2014-12-10 韩国电子通信研究院 编码方法和装置、以及解码方法和装置
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JP5799707B2 (ja) * 2011-09-26 2015-10-28 ソニー株式会社 オーディオ符号化装置およびオーディオ符号化方法、オーディオ復号装置およびオーディオ復号方法、並びにプログラム
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KR102250835B1 (ko) * 2019-08-05 2021-05-11 국방과학연구소 수동 소나의 협대역 신호를 탐지하기 위한 lofar 또는 demon 그램의 압축 장치
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11817111B2 (en) 2018-04-11 2023-11-14 Dolby Laboratories Licensing Corporation Perceptually-based loss functions for audio encoding and decoding based on machine learning

Also Published As

Publication number Publication date
CA2482427A1 (fr) 2003-10-23
JP2005527851A (ja) 2005-09-15
DE50204426D1 (de) 2005-11-03
HK1077391A1 (en) 2006-02-10
JP4081447B2 (ja) 2008-04-23
CN1625768A (zh) 2005-06-08
KR100892152B1 (ko) 2009-04-10
WO2003088212A1 (fr) 2003-10-23
AU2002358578A1 (en) 2003-10-27
DE10217297A1 (de) 2003-11-06
CN1258172C (zh) 2006-05-31
KR20050007312A (ko) 2005-01-17
EP1495464A1 (fr) 2005-01-12
EP1495464B1 (fr) 2005-09-28
ATE305655T1 (de) 2005-10-15

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