BR112012009490A2 - codec de áudio multimodo e codificação adaptado celp do mesmo - Google Patents

codec de áudio multimodo e codificação adaptado celp do mesmo

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Publication number
BR112012009490A2
BR112012009490A2 BR112012009490A BR112012009490A BR112012009490A2 BR 112012009490 A2 BR112012009490 A2 BR 112012009490A2 BR 112012009490 A BR112012009490 A BR 112012009490A BR 112012009490 A BR112012009490 A BR 112012009490A BR 112012009490 A2 BR112012009490 A2 BR 112012009490A2
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Brazil
Prior art keywords
coded
celp
gain
transformation
gain value
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BR112012009490A
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English (en)
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BR112012009490B1 (pt
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Bernhard Grill
Guillaume Fuchs
Markus Multrus
Ralf Geiger
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Fraunhofer Ges Forschung
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Publication of BR112012009490A2 publication Critical patent/BR112012009490A2/pt
Publication of BR112012009490B1 publication Critical patent/BR112012009490B1/pt

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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
    • G10L19/04—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
    • 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
    • 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
    • G10L19/083—Determination or coding of the excitation function; Determination or coding of the long-term prediction parameters the excitation function being an excitation gain
    • 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
    • G10L2019/0002—Codebook adaptations

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  • 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

codec de áudio multimodo e codificação adaptado celp do mesmo. a presente invenção refere-se a elementos de fluxo contínuo de subquadros que são codificados diferencialmente a um valor do ganho global para que uma mudança do valor do ganho global dos resultados dos quadros em um ajuste de um nível de saída da representação decodificada do conteúdo do áudio. ao mesmo tempo, a condição diferencial salva bits de outro modo correndo quando introduz um novo elemento de sintaxe em um fluxo contínuo codificado. ainda mais, a condição diferencial permite a redução de carga de ajuste global do ganho de um fluxo contínuo codificado permitindo a resolução de tempo na definição do valor do ganho global para ser menor que a resolução de tempo em que o elemento de fluxo contínuo acima mencionado diferencialmente codificado para o valor de o ganho global ajusta o ganho dos respectivos subquadros. de acordo com outro aspecto, um controle do ganho global através dos quadros codificados celp e a transformação dos quadros codificados é alcançada através do controle do ganho da excitação do livro de códigos do codec celp, junto com um nível da transformação ou transformação inversa da transformação dos quadros codificados. de acordo com até mesmo outro aspecto, uma variação da intensidade de um fluxo continuo codificado celp sob mudanças do respectivo valor do ganho é processado bem mais adaptado ao comportamento das transformações codificadas nível ajustes, através da realização do valor do ganho determinação na condição celp no domínio ponderado do sinal de excitação.
BR112012009490-4A 2009-10-20 2010-10-19 ddecodificador de áudio multimodo e método de decodificação de áudio multimodo para fornecer uma representação decodificada do conteúdo de áudio com base em um fluxo de bits codificados e codificador de áudio multimodo para codificação de um conteúdo de áudio em um fluxo de bits codificados BR112012009490B1 (pt)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US25344009P 2009-10-20 2009-10-20
US61/253,440 2009-10-20
PCT/EP2010/065718 WO2011048094A1 (en) 2009-10-20 2010-10-19 Multi-mode audio codec and celp coding adapted therefore

Publications (2)

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BR112012009490A2 true BR112012009490A2 (pt) 2016-05-03
BR112012009490B1 BR112012009490B1 (pt) 2020-12-01

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BR112012009490-4A BR112012009490B1 (pt) 2009-10-20 2010-10-19 ddecodificador de áudio multimodo e método de decodificação de áudio multimodo para fornecer uma representação decodificada do conteúdo de áudio com base em um fluxo de bits codificados e codificador de áudio multimodo para codificação de um conteúdo de áudio em um fluxo de bits codificados

Country Status (18)

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US (3) US8744843B2 (pt)
EP (1) EP2491555B1 (pt)
JP (2) JP6214160B2 (pt)
KR (1) KR101508819B1 (pt)
CN (2) CN102859589B (pt)
AU (1) AU2010309894B2 (pt)
BR (1) BR112012009490B1 (pt)
CA (3) CA2862712C (pt)
ES (1) ES2453098T3 (pt)
HK (1) HK1175293A1 (pt)
MX (1) MX2012004593A (pt)
MY (2) MY167980A (pt)
PL (1) PL2491555T3 (pt)
RU (1) RU2586841C2 (pt)
SG (1) SG10201406778VA (pt)
TW (1) TWI455114B (pt)
WO (1) WO2011048094A1 (pt)
ZA (1) ZA201203570B (pt)

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