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AR078704A1 - Codificador de senal de audio, decodificador de senal de audio, metodo para codificar o decodificar una senal de audio utilizando una cancelacion de ltipo aliasing - Google Patents

Codificador de senal de audio, decodificador de senal de audio, metodo para codificar o decodificar una senal de audio utilizando una cancelacion de ltipo aliasing

Info

Publication number
AR078704A1
AR078704A1 ARP100103831A ARP100103831A AR078704A1 AR 078704 A1 AR078704 A1 AR 078704A1 AR P100103831 A ARP100103831 A AR P100103831A AR P100103831 A ARP100103831 A AR P100103831A AR 078704 A1 AR078704 A1 AR 078704A1
Authority
AR
Argentina
Prior art keywords
domain
audio signal
transform
cancellation
spectral
Prior art date
Application number
ARP100103831A
Other languages
English (en)
Original Assignee
Dolby Int Ab
Koninkl Philips Electronics Nv
Voiceage Corp
Fraunhofer Ges Forschung
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 Dolby Int Ab, Koninkl Philips Electronics Nv, Voiceage Corp, Fraunhofer Ges Forschung filed Critical Dolby Int Ab
Publication of AR078704A1 publication Critical patent/AR078704A1/es

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
    • 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 senal de audio para proporcionar una representacion decodificada de un contenido de audio en base a una representacion codificada del contenido de audio comprende una ruta de dominio de la transformada configurada para obtener una representacion de dominio temporal de una porcion del contenido de audio codificada en un modo de dominio de la transformada en base a un primer grupo de coeficientes espectrales, una representacion de una senal de estímulo de cancelacion de solapamiento y una pluralidad de parámetros de dominio de prediccion 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 prediccion lineal para obtener una version 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 representacion de dominio temporal del contenido de audio en base a una version de moldeado espectral del primer grupo de coeficientes espectrales. La ruta de dominio de la transformada comprende un filtro de estímulo de cancelacion de solapamiento configurado para filtrar la senal de estímulo de cancelacion de solapamiento dependiendo de al menos un subgrupo de los parámetros de dominio de prediccion lineal, para derivar una senal de síntesis de cancelacion de solapamiento de la senal de estímulo de cancelacion de solapamiento. La ruta de dominio de la transformada también comprende un combinador configurado para combinar la representacion de dominio temporal del contenido de audio con la senal de síntesis de cancelacion de solapamiento, o una version postprocesada del mismo, para obtener una senal de dominio temporal con solapamiento reducido.
ARP100103831A 2009-10-20 2010-10-20 Codificador de senal de audio, decodificador de senal de audio, metodo para codificar o decodificar una senal de audio utilizando una cancelacion de ltipo aliasing AR078704A1 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US25346809P 2009-10-20 2009-10-20

Publications (1)

Publication Number Publication Date
AR078704A1 true AR078704A1 (es) 2011-11-30

Family

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ARP100103831A AR078704A1 (es) 2009-10-20 2010-10-20 Codificador de senal de audio, decodificador de senal de audio, metodo para codificar o decodificar una senal de audio utilizando una cancelacion de ltipo aliasing

Country Status (17)

Country Link
US (1) US8484038B2 (es)
EP (3) EP2491556B1 (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)
ES (1) ES2978918T3 (es)
MX (1) MX2012004648A (es)
MY (1) MY166169A (es)
PL (1) PL2491556T3 (es)
RU (1) RU2591011C2 (es)
TW (1) TWI430263B (es)
WO (1) WO2011048117A1 (es)
ZA (1) ZA201203608B (es)

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