AR072421A1 - Esquema de codificacion/decodificacion de audio a baja velocidad binaria y conmutadores en cascada - Google Patents

Esquema de codificacion/decodificacion de audio a baja velocidad binaria y conmutadores en cascada

Info

Publication number
AR072421A1
AR072421A1 ARP090102435A ARP090102435A AR072421A1 AR 072421 A1 AR072421 A1 AR 072421A1 AR P090102435 A ARP090102435 A AR P090102435A AR P090102435 A ARP090102435 A AR P090102435A AR 072421 A1 AR072421 A1 AR 072421A1
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AR
Argentina
Prior art keywords
branch
domain
coding
lpc
spectral
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ARP090102435A
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English (en)
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Fraunhofer Ges Forschung
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Publication of AR072421A1 publication Critical patent/AR072421A1/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
    • G10L19/008—Multichannel audio signal coding or decoding using interchannel correlation to reduce redundancy, e.g. joint-stereo, intensity-coding or matrixing
    • 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
    • G10L19/04—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
    • G10L19/16—Vocoder architecture
    • G10L19/173—Transcoding, i.e. converting between two coded representations avoiding cascaded coding-decoding
    • 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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M7/00—Conversion of a code where information is represented by a given sequence or number of digits to a code where the same, similar or subset of information is represented by a different sequence or number of digits
    • H03M7/30—Compression; Expansion; Suppression of unnecessary data, e.g. redundancy reduction
    • 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
    • G10L19/02—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
    • G10L2019/0001—Codebooks
    • G10L2019/0007—Codebook element generation
    • G10L2019/0008—Algebraic codebooks

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Signal Processing (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Human Computer Interaction (AREA)
  • Computational Linguistics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Mathematical Physics (AREA)
  • Theoretical Computer Science (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)

Abstract

Un Codificador de audio que comprende una primera ramificacion de codificacion orientada al modelo de informacion de sumidero como una ramificacion de codificacion de dominio espectral, una segunda fuente de informacion o ramificacion de codificacion orientada a SNR como una ramificacion de codificacion en dominio LPC, y un conmutador para conmutar entre la primera ramificacion de codificacion y la segunda ramificacion de codificacion, donde la segunda ramificacion de codificacion comprende un conversor en un dominio específico diferente del dominio espectral como una etapa de análisis LPC que genera una senal de excitacion, y donde la segunda ramificacion de codificacion además comprende una ramificacion de codificacion en dominio especifico como la ramificacion de procesamiento en dominio LPC, y una ramificacion de codificacion en dominio espectral específico como la ramificacion de procesamiento en dominio espectral LPC, y un conmutador adicional para conmutar entre la ramificacion de codificacion en un segundo decodificador de dominio como la ramificacion de decodificacion en dominio LPC para decodificar una senal como una senal de excitacion en el segundo dominio, y un tercer decodificador de dominio como la ramificacion del decodificador espectral LPC y dos conmutadores en cascada para conmutar entre los decodificadores.
ARP090102435A 2008-07-11 2009-06-30 Esquema de codificacion/decodificacion de audio a baja velocidad binaria y conmutadores en cascada AR072421A1 (es)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US7985408P 2008-07-11 2008-07-11
EP08017663 2008-10-08
EP09002271A EP2144230A1 (en) 2008-07-11 2009-02-18 Low bitrate audio encoding/decoding scheme having cascaded switches

Publications (1)

Publication Number Publication Date
AR072421A1 true AR072421A1 (es) 2010-08-25

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Family Applications (1)

Application Number Title Priority Date Filing Date
ARP090102435A AR072421A1 (es) 2008-07-11 2009-06-30 Esquema de codificacion/decodificacion de audio a baja velocidad binaria y conmutadores en cascada

Country Status (18)

Country Link
US (10) US8930198B2 (es)
EP (2) EP2144230A1 (es)
JP (1) JP5244972B2 (es)
KR (1) KR101224559B1 (es)
CN (1) CN102113051B (es)
AR (1) AR072421A1 (es)
AU (1) AU2009267467B2 (es)
CA (1) CA2729878C (es)
ES (1) ES2569912T3 (es)
HK (1) HK1156142A1 (es)
IL (1) IL210331A (es)
MX (1) MX2011000362A (es)
MY (1) MY153455A (es)
PT (1) PT2301023T (es)
RU (1) RU2485606C2 (es)
TW (1) TWI539443B (es)
WO (1) WO2010003564A1 (es)
ZA (1) ZA201009163B (es)

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