MX2012004648A - Codificacion de señal de audio, decodificador de señal de audio, metodo para codificar o decodificar una señal de audio utilizando una cancelacion del tipo aliasing. - Google Patents

Codificacion de señal de audio, decodificador de señal de audio, metodo para codificar o decodificar una señal de audio utilizando una cancelacion del tipo aliasing.

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Publication number
MX2012004648A
MX2012004648A MX2012004648A MX2012004648A MX2012004648A MX 2012004648 A MX2012004648 A MX 2012004648A MX 2012004648 A MX2012004648 A MX 2012004648A MX 2012004648 A MX2012004648 A MX 2012004648A MX 2012004648 A MX2012004648 A MX 2012004648A
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MX
Mexico
Prior art keywords
domain
aliasing
audio signal
cancellation
representation
Prior art date
Application number
MX2012004648A
Other languages
English (en)
Inventor
Lars Villemoes
Max Neuendorf
Bernhard Grill
Nikolaus Rettelbach
Bruno Bessette
Ralf Geiger
Philippe Gournay
Roch Lefebvre
Jeremie Lecomte
Bayer Stefan
Redwan Salami
Albertus C Den Brinker
Original Assignee
Fraunhofer Ges Forschung
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Application filed by Fraunhofer Ges Forschung filed Critical Fraunhofer Ges Forschung
Publication of MX2012004648A publication Critical patent/MX2012004648A/es

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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
    • 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
    • G10L19/03—Spectral prediction for preventing pre-echo; Temporary noise shaping [TNS], e.g. in MPEG2 or MPEG4
    • 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
    • G10L19/08—Determination or coding of the excitation function; Determination or coding of the long-term prediction parameters
    • G10L19/12—Determination or coding of the excitation function; Determination or coding of the long-term prediction parameters the excitation function being a code excitation, e.g. in code excited linear prediction [CELP] 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
    • G10L19/04—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
    • 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
    • G10L19/04—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
    • G10L19/20—Vocoders using multiple modes using sound class specific coding, hybrid encoders or object based coding
    • 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
    • G10L2019/0001—Codebooks
    • G10L2019/0007—Codebook element generation
    • G10L2019/0008—Algebraic codebooks

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (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)
  • Spectroscopy & Molecular Physics (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)

Abstract

Un decodificador de señal de audio para proporcionar una representación decodificada de un contenido de audio en base a una representación codificada del contenido de audio comprende una ruta de dominio de la transformada configurada para obtener una representación de dominio temporal de una porción del contenido de audio codificada en un modo de dominio de la transformada en base a un primer grupo de coeficientes espectrales, una representación de una señal de estímulo de cancelación de solapamiento y una pluralidad de parámetros de dominio de predicción lineal. La ruta de dominio de la transformada comprende un procesador espectral configurado para aplicar un moldeado espectral al primer grupo de coeficientes espectrales dependiendo de al menos un subgrupo de parámetros de dominio de predicción lineal para obtener una versión de moldeado espectral del primer grupo de coeficientes espectrales. La ruta de dominio de la transformada también comprende un primer conversor de dominio frecuencial a dominio temporal configurado para obtener una representación de dominio temporal del contenido de audio en base a una versión de moldeado espectral del primer grupo de coeficientes espectrales. La ruta de dominio de la transformada comprende un filtro de estímulo de cancelación de solapamiento configurado para filtrar la señal de estímulo de cancelación de solapamiento dependiendo de al menos un subgrupo de los parámetros de dominio de predicción lineal, para derivar una señal de síntesis de cancelación de solapamiento de la señal de estímulo de cancelación de solapamiento. La ruta de dominio de la transformada también comprende un combinador configurado para combinar la representación de dominio temporal del contenido de audio con la señal de síntesis de cancelación de solapamiento, o una versión postprocesada del mismo, para obtener una señal de dominio temporal con solapamiento reducido.
MX2012004648A 2009-10-20 2010-10-19 Codificacion de señal de audio, decodificador de señal de audio, metodo para codificar o decodificar una señal de audio utilizando una cancelacion del tipo aliasing. MX2012004648A (es)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US25346809P 2009-10-20 2009-10-20
PCT/EP2010/065752 WO2011048117A1 (en) 2009-10-20 2010-10-19 Audio signal encoder, audio signal decoder, method for encoding or decoding an audio signal using an aliasing-cancellation

Publications (1)

Publication Number Publication Date
MX2012004648A true MX2012004648A (es) 2012-05-29

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MX2012004648A MX2012004648A (es) 2009-10-20 2010-10-19 Codificacion de señal de audio, decodificador de señal de audio, metodo para codificar o decodificar una señal de audio utilizando una cancelacion del tipo aliasing.

Country Status (15)

Country Link
US (1) US8484038B2 (es)
EP (3) EP4358082A1 (es)
JP (1) JP5247937B2 (es)
KR (1) KR101411759B1 (es)
CN (1) CN102884574B (es)
AR (1) AR078704A1 (es)
AU (1) AU2010309838B2 (es)
BR (1) BR112012009447B1 (es)
CA (1) CA2778382C (es)
MX (1) MX2012004648A (es)
MY (1) MY166169A (es)
RU (1) RU2591011C2 (es)
TW (1) TWI430263B (es)
WO (1) WO2011048117A1 (es)
ZA (1) ZA201203608B (es)

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