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MX2010004220A - Codificacion de audio usando mezcla descendente. - Google Patents

Codificacion de audio usando mezcla descendente.

Info

Publication number
MX2010004220A
MX2010004220A MX2010004220A MX2010004220A MX2010004220A MX 2010004220 A MX2010004220 A MX 2010004220A MX 2010004220 A MX2010004220 A MX 2010004220A MX 2010004220 A MX2010004220 A MX 2010004220A MX 2010004220 A MX2010004220 A MX 2010004220A
Authority
MX
Mexico
Prior art keywords
signal
audio
type
audio signal
downmix
Prior art date
Application number
MX2010004220A
Other languages
English (en)
Inventor
Juergen Herre
Johannes Hilpert
Andreas Hoelzer
Oliver Hellmuth
Leonid Terentiev
Cornelia Falch
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=40149576&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=MX2010004220(A) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Fraunhofer Ges Forschung filed Critical Fraunhofer Ges Forschung
Publication of MX2010004220A publication Critical patent/MX2010004220A/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
    • 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
    • G10L19/04—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
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S3/00—Systems employing more than two channels, e.g. quadraphonic
    • H04S3/002—Non-adaptive circuits, e.g. manually adjustable or static, for enhancing the sound image or the spatial distribution
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S2420/00—Techniques used stereophonic systems covered by H04S but not provided for in its groups
    • H04S2420/03—Application of parametric coding in stereophonic audio systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S2420/00—Techniques used stereophonic systems covered by H04S but not provided for in its groups
    • H04S2420/07—Synergistic effects of band splitting and sub-band processing

Landscapes

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

Abstract

Se describe un descodificador de audio para descodificar una señal de multi-audio-objeto que tiene una señal de audio de un primer tipo y una señal de audio de un segundo tipo codificada en la misma, la señal de multi-audio-objeto consiste de una señal de mezcla descendente (56) e información lateral (58), la información lateral comprende información de nivel (60) de la señal de audio del primer tipo y la señal de audio del segundo tipo en una primera resolución de tiempo/frecuencia predeterminada (42) y una señal residual (62) que especifica valores de nivel residual en una segunda resolución de tiempo/frecuencia predeterminada, el descodificador de audio comprende medios (52) para calcular coeficientes de predicción (64) en base a la información de nivel (60) y medios (54) para mezclar ascendentemente la señal de mezcla descendente (56) en base a los coeficientes de predicción (64) y la señal residual (62) para obtener una primera señal de audio de mezcla ascendente que se aproxima a la señal de audio del primer tipo y/o una segunda señal de audio de mezcla ascendente que se aproxima a la señal de audio del segundo tipo.
MX2010004220A 2007-10-17 2008-10-17 Codificacion de audio usando mezcla descendente. MX2010004220A (es)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US98057107P 2007-10-17 2007-10-17
US99133507P 2007-11-30 2007-11-30
PCT/EP2008/008799 WO2009049895A1 (en) 2007-10-17 2008-10-17 Audio coding using downmix

Publications (1)

Publication Number Publication Date
MX2010004220A true MX2010004220A (es) 2010-06-11

Family

ID=40149576

Family Applications (2)

Application Number Title Priority Date Filing Date
MX2010004220A MX2010004220A (es) 2007-10-17 2008-10-17 Codificacion de audio usando mezcla descendente.
MX2010004138A MX2010004138A (es) 2007-10-17 2008-10-17 Codificacion de audio usando conversion de estereo a multicanal.

Family Applications After (1)

Application Number Title Priority Date Filing Date
MX2010004138A MX2010004138A (es) 2007-10-17 2008-10-17 Codificacion de audio usando conversion de estereo a multicanal.

Country Status (12)

Country Link
US (4) US8280744B2 (es)
EP (2) EP2082396A1 (es)
JP (2) JP5260665B2 (es)
KR (4) KR101290394B1 (es)
CN (2) CN101849257B (es)
AU (2) AU2008314029B2 (es)
BR (2) BRPI0816556A2 (es)
CA (2) CA2701457C (es)
MX (2) MX2010004220A (es)
RU (2) RU2452043C2 (es)
TW (2) TWI395204B (es)
WO (2) WO2009049896A1 (es)

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