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MX2012008076A - Codificador de audio, decodificador de audio, metodo para codificar y decodificar una informacion de audio y programa de computacion que obtiene un valor de contexto de sub-region basado en una norma de valores espectrales previamente decodificados. - Google Patents

Codificador de audio, decodificador de audio, metodo para codificar y decodificar una informacion de audio y programa de computacion que obtiene un valor de contexto de sub-region basado en una norma de valores espectrales previamente decodificados.

Info

Publication number
MX2012008076A
MX2012008076A MX2012008076A MX2012008076A MX2012008076A MX 2012008076 A MX2012008076 A MX 2012008076A MX 2012008076 A MX2012008076 A MX 2012008076A MX 2012008076 A MX2012008076 A MX 2012008076A MX 2012008076 A MX2012008076 A MX 2012008076A
Authority
MX
Mexico
Prior art keywords
spectral values
audio
basis
decoded spectral
previously decoded
Prior art date
Application number
MX2012008076A
Other languages
English (en)
Inventor
Marc Gayer
Markus Multrus
Nikolaus Rettelbach
Guillaume Fuchs
Vignesh Subbaraman
Christian Griebel
Patrick Warmbold
Oliver Weiss
Original Assignee
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 Fraunhofer Ges Forschung filed Critical Fraunhofer Ges Forschung
Publication of MX2012008076A publication Critical patent/MX2012008076A/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
    • 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
    • G10L19/002—Dynamic bit allocation
    • 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
    • G10L19/0204—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 subband decomposition
    • G10L19/0208—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
    • G10L19/02—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
    • 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
    • G10L19/06—Determination or coding of the spectral characteristics, e.g. of the short-term prediction coefficients

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)
  • Error Detection And Correction (AREA)

Abstract

Un decodificador de audio para la provisión de una información de audio decodificada sobre la base de una información de audio codificada comprende un decodificador aritmético para la provisión de una pluralidad de valores espectrales decodificados sobre la base de una representación aritméticamente codificada de los valores espectrales y un convertidor del dominio de la frecuencia al dominio del tiempo para la provisión de una representación de audio en el dominio del tiempo utilizando los valores espectrales, para obtener la información de audio decodificada. El decodificador aritmético está configurado para seleccionar una regla de mapeo que describe un mapeo de un valor de código sobre un código de símbolo dependiendo de un estado del contexto descripto por un valor numérico de contexto actual. El decodificador aritmético está configurado para determinar el valor numérico de contexto actual dependiendo de una pluralidad de valores espectrales previamente decodificados. El decodificador aritmético está configurado para obtener una pluralidad de valores de subregión de contexto sobre la base de valores espectrales previamente decodificados y para almacenar dichos valores de subregión de contexto. El decodificador aritmético está configurado para derivar un valor numérico de contexto actual asociado a uno o más valores espectrales a decodificar dependiendo de los valores de subregión de contexto almacenados. El decodificador aritmético está configurado para computar la norma de un vector formado por una pluralidad de valores espectrales previamente decodificados para obtener un valor común de subregión de contexto asociado a la pluralidad de valores espectrales previamente decodificados. Un codificador de audio utiliza un concepto similar. (ver figura).
MX2012008076A 2010-01-12 2011-01-11 Codificador de audio, decodificador de audio, metodo para codificar y decodificar una informacion de audio y programa de computacion que obtiene un valor de contexto de sub-region basado en una norma de valores espectrales previamente decodificados. MX2012008076A (es)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US29435710P 2010-01-12 2010-01-12
PCT/EP2011/050275 WO2011086067A1 (en) 2010-01-12 2011-01-11 Audio encoder, audio decoder, method for encoding and decoding an audio information, and computer program obtaining a context sub-region value on the basis of a norm of previously decoded spectral values

Publications (1)

Publication Number Publication Date
MX2012008076A true MX2012008076A (es) 2013-01-29

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Family Applications (3)

Application Number Title Priority Date Filing Date
MX2012008076A MX2012008076A (es) 2010-01-12 2011-01-11 Codificador de audio, decodificador de audio, metodo para codificar y decodificar una informacion de audio y programa de computacion que obtiene un valor de contexto de sub-region basado en una norma de valores espectrales previamente decodificados.
MX2012008075A MX2012008075A (es) 2010-01-12 2011-01-11 Codificador de audio, decodificador de audio, metodo para codificar e informacion de audio, metodo para decodificar una informacion de audio y programa de computacion utilizando una modificacion de una representacion de un numero de un valor de contexto numerico previo.
MX2012008077A MX2012008077A (es) 2010-01-12 2011-01-11 Codificador de audio, metodo para codificar e informacion de audio, metodo para decodificar una informacion de audio y programa de computacion que utiliza una tabla hash que describe tanto valores de estado significativos como limites de intervalo.

Family Applications After (2)

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MX2012008075A MX2012008075A (es) 2010-01-12 2011-01-11 Codificador de audio, decodificador de audio, metodo para codificar e informacion de audio, metodo para decodificar una informacion de audio y programa de computacion utilizando una modificacion de una representacion de un numero de un valor de contexto numerico previo.
MX2012008077A MX2012008077A (es) 2010-01-12 2011-01-11 Codificador de audio, metodo para codificar e informacion de audio, metodo para decodificar una informacion de audio y programa de computacion que utiliza una tabla hash que describe tanto valores de estado significativos como limites de intervalo.

Country Status (19)

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US (4) US8898068B2 (es)
EP (3) EP2517200B1 (es)
JP (3) JP5622865B2 (es)
KR (3) KR101339057B1 (es)
CN (3) CN102844809B (es)
AR (3) AR079886A1 (es)
AU (3) AU2011206677B9 (es)
BR (6) BR112012017256B1 (es)
CA (3) CA2786944C (es)
ES (3) ES2532203T3 (es)
MX (3) MX2012008076A (es)
MY (3) MY153845A (es)
PL (3) PL2524371T3 (es)
PT (1) PT2524371T (es)
RU (2) RU2628162C2 (es)
SG (3) SG182466A1 (es)
TW (3) TWI466103B (es)
WO (3) WO2011086065A1 (es)
ZA (3) ZA201205938B (es)

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EP2517200B1 (en) 2015-04-15
MX2012008075A (es) 2013-12-16
PL2517200T3 (pl) 2015-10-30
KR101339058B1 (ko) 2013-12-10
KR20120109616A (ko) 2012-10-08
RU2012141242A (ru) 2014-05-27
KR101339057B1 (ko) 2013-12-10

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