MX2010004282A - Codificacion de audio y dialogo escalable utilizando codificacion de combinacion de espectro mdct. - Google Patents

Codificacion de audio y dialogo escalable utilizando codificacion de combinacion de espectro mdct.

Info

Publication number
MX2010004282A
MX2010004282A MX2010004282A MX2010004282A MX2010004282A MX 2010004282 A MX2010004282 A MX 2010004282A MX 2010004282 A MX2010004282 A MX 2010004282A MX 2010004282 A MX2010004282 A MX 2010004282A MX 2010004282 A MX2010004282 A MX 2010004282A
Authority
MX
Mexico
Prior art keywords
spectral lines
combinatorial
encoding
spectrum
transform
Prior art date
Application number
MX2010004282A
Other languages
English (en)
Inventor
Pengjun Huang
Yuriy Reznik
Original Assignee
Qualcomm Inc
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 Qualcomm Inc filed Critical Qualcomm Inc
Publication of MX2010004282A publication Critical patent/MX2010004282A/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
    • 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
    • G10L19/24—Variable rate codecs, e.g. for generating different qualities using a scalable representation such as hierarchical encoding or layered encoding
    • 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
    • G10L19/038—Vector quantisation, e.g. TwinVQ audio
    • 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)
  • Quality & Reliability (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)

Abstract

Se proporciona un códec de audio y diálogo escalable que ejecuta codificación de espectro de combinación; una señal residual es obtenida de una capa de codificación basada en Predicción Lineal Excitada por Código (CELP), donde la señal residual es una diferencia entre una señal de audio original y una versión reconstruida de la señal de audio original; la señal residual es transformada en una capa de transformada de tipo Transformada de Coseno Discreta (DCT) para obtener un espectro de transformada correspondiente que tenga una pluralidad de líneas espectrales; las líneas espectrales del espectro de transformada son transformadas utilizando una técnica de codificación de posición de combinación; la técnica de codificación de posición de combinación incluye generar un índice lexicográfico para un sub-conjunto seleccionado de líneas espectrales, donde cada índice lexicográfico representa una de una pluralidad de posibles secuencias binarias que representan las posiciones del subconjunto seleccionado de líneas espectrales; el índice lexicográfico representa líneas espectrales no cero en una secuencia binaria en menos bits que la longitud de la secuencia binaria.
MX2010004282A 2007-10-22 2008-10-22 Codificacion de audio y dialogo escalable utilizando codificacion de combinacion de espectro mdct. MX2010004282A (es)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US98181407P 2007-10-22 2007-10-22
US12/255,604 US8527265B2 (en) 2007-10-22 2008-10-21 Low-complexity encoding/decoding of quantized MDCT spectrum in scalable speech and audio codecs
PCT/US2008/080824 WO2009055493A1 (en) 2007-10-22 2008-10-22 Scalable speech and audio encoding using combinatorial encoding of mdct spectrum

Publications (1)

Publication Number Publication Date
MX2010004282A true MX2010004282A (es) 2010-05-05

Family

ID=40210550

Family Applications (1)

Application Number Title Priority Date Filing Date
MX2010004282A MX2010004282A (es) 2007-10-22 2008-10-22 Codificacion de audio y dialogo escalable utilizando codificacion de combinacion de espectro mdct.

Country Status (13)

Country Link
US (1) US8527265B2 (es)
EP (1) EP2255358B1 (es)
JP (2) JP2011501828A (es)
KR (1) KR20100085994A (es)
CN (2) CN102968998A (es)
AU (1) AU2008316860B2 (es)
BR (1) BRPI0818405A2 (es)
CA (1) CA2701281A1 (es)
IL (1) IL205131A0 (es)
MX (1) MX2010004282A (es)
RU (1) RU2459282C2 (es)
TW (1) TWI407432B (es)
WO (1) WO2009055493A1 (es)

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Also Published As

Publication number Publication date
CN102968998A (zh) 2013-03-13
EP2255358B1 (en) 2013-07-03
RU2459282C2 (ru) 2012-08-20
CN101836251B (zh) 2012-12-12
TW200935402A (en) 2009-08-16
US20090234644A1 (en) 2009-09-17
CA2701281A1 (en) 2009-04-30
BRPI0818405A2 (pt) 2016-10-11
IL205131A0 (en) 2010-11-30
CN101836251A (zh) 2010-09-15
KR20100085994A (ko) 2010-07-29
AU2008316860B2 (en) 2011-06-16
AU2008316860A1 (en) 2009-04-30
JP2011501828A (ja) 2011-01-13
TWI407432B (zh) 2013-09-01
US8527265B2 (en) 2013-09-03
RU2010120678A (ru) 2011-11-27
EP2255358A1 (en) 2010-12-01
JP2013178539A (ja) 2013-09-09
WO2009055493A1 (en) 2009-04-30

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