AR072738A1 - Codificador y decodificador de audio para codificar y decodificar muestras de audio - Google Patents

Codificador y decodificador de audio para codificar y decodificar muestras de audio

Info

Publication number
AR072738A1
AR072738A1 ARP090102625A ARP090102625A AR072738A1 AR 072738 A1 AR072738 A1 AR 072738A1 AR P090102625 A ARP090102625 A AR P090102625A AR P090102625 A ARP090102625 A AR P090102625A AR 072738 A1 AR072738 A1 AR 072738A1
Authority
AR
Argentina
Prior art keywords
encoder
audio
samples
audio samples
coding
Prior art date
Application number
ARP090102625A
Other languages
English (en)
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 AR072738A1 publication Critical patent/AR072738A1/es

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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
    • G10L19/04—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
    • G10L19/04—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
    • 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
    • G10L19/02—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
    • G10L19/022—Blocking, i.e. grouping of samples in time; Choice of analysis windows; Overlap factoring
    • 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

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 codificador de audio (100) para codificar muestras de audio, que comprenden un primer codificador introductor de aliasing en dominio de tiempo (110) para decodificar muestras de audio en un primer dominio de codificacion, el primer codificador Introductor de aliasing en dominio de tiempo (110) que tiene una primera regla de tramado, una ventana de inicio y una ventana de detencion. El codificador de audio (100) además comprende un segundo codificador (120) para codificar muestras en un segundo dominio de codificacion, el segundo codificador (120) que tiene un numero de muestras de audio de tamano de trama predeterminado, y un numero de muestras de audio de periodo de puesta a punto de codificacion, el segundo codificador (120) que tiene una segunda regla de tramado diferente, una trama del segundo codificador (120) que es una representacion codificada de un numero de muestras de audio posteriores en el tiempo, el numero que es igual al numero de muestras de audio de tamano de trama predeterminado. El codificador de audio (100) además comprende un controlador (130) que cambia del primer codificador (110) al segundo codificador (120) en respuesta a una característica de las muestras de audio, y para modificar la segunda regla de tramado en respuesta a cambio del primer codificador (110) al segundo codificador (120) o para modificar la ventana de inicio o la ventana de detencion del primer codificador (110), en donde la segunda regla de tramado permanece sin modificaciones.
ARP090102625A 2008-07-11 2009-07-13 Codificador y decodificador de audio para codificar y decodificar muestras de audio AR072738A1 (es)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US7985608P 2008-07-11 2008-07-11
US10382508P 2008-10-08 2008-10-08
PCT/EP2009/004651 WO2010003563A1 (en) 2008-07-11 2009-06-26 Audio encoder and decoder for encoding and decoding audio samples

Publications (1)

Publication Number Publication Date
AR072738A1 true AR072738A1 (es) 2010-09-15

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
ARP090102625A AR072738A1 (es) 2008-07-11 2009-07-13 Codificador y decodificador de audio para codificar y decodificar muestras de audio

Country Status (21)

Country Link
US (1) US8892449B2 (es)
EP (2) EP2311032B1 (es)
JP (2) JP5551695B2 (es)
KR (1) KR101325335B1 (es)
CN (1) CN102089811B (es)
AR (1) AR072738A1 (es)
AU (1) AU2009267466B2 (es)
BR (1) BRPI0910512B1 (es)
CA (3) CA2871498C (es)
CO (1) CO6351837A2 (es)
EG (1) EG26653A (es)
ES (2) ES2564400T3 (es)
HK (3) HK1155552A1 (es)
MX (1) MX2011000366A (es)
MY (3) MY181247A (es)
PL (2) PL3002750T3 (es)
PT (1) PT3002750T (es)
RU (1) RU2515704C2 (es)
TW (1) TWI459379B (es)
WO (1) WO2010003563A1 (es)
ZA (1) ZA201100089B (es)

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