BRPI0514620A - método e aparelho para processar um conjunto de n sinais de áudio - Google Patents

método e aparelho para processar um conjunto de n sinais de áudio

Info

Publication number
BRPI0514620A
BRPI0514620A BRPI0514620-8A BRPI0514620A BRPI0514620A BR PI0514620 A BRPI0514620 A BR PI0514620A BR PI0514620 A BRPI0514620 A BR PI0514620A BR PI0514620 A BRPI0514620 A BR PI0514620A
Authority
BR
Brazil
Prior art keywords
audio signals
characteristic
signals
time
processing
Prior art date
Application number
BRPI0514620-8A
Other languages
English (en)
Inventor
Alan Jeffrey Seefeldt
Mark Stuart Vinton
Original Assignee
Dolby Lab Licensing Corp
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 Dolby Lab Licensing Corp filed Critical Dolby Lab Licensing Corp
Publication of BRPI0514620A publication Critical patent/BRPI0514620A/pt
Publication of BRPI0514620A8 publication Critical patent/BRPI0514620A8/pt

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
    • G10L19/008—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

Landscapes

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

Abstract

MéTODO E APARELHO PARA PROCESSAR UM CONJUNTO DE N SINAIS DE áUDIO A presente invenção refere-se a cada um dentre N sinais de áudio que é filtrado com uma característica única de filtro de decorrelação (38), a característica sendo uma característica linear causal invariável com o tempo no domínio do tempo ou no equivalente do mesmo no domínio da freqüência, e, para cada característica de filtro de decorrelação (38), combinar (40, 44, 46), de uma maneira variável no tempo e na freqüência, seus sinais de entrada (Z~ i~) e de saída (Z-i) para proporcionar um conjunto de N sinais processados (X~ i~). O conjunto de características de filtro de decorrelação (38) é projetado de modo que todos os sinais de entrada e de saída são aproximadamente e mutuamente decorrelacionados. O conjunto de N sinais de áudio pode ser sintetizado a partir dos M sinais de áudio pela conversão para mais canais, onde M é um ou mais e N é maior do que M.
BRPI0514620A 2004-08-25 2005-08-24 Método e aparelho para processar um conjunto de n sinais de áudio BRPI0514620A8 (pt)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US60472504P 2004-08-25 2004-08-25
US70013705P 2005-07-18 2005-07-18
US70578405P 2005-08-05 2005-08-05
PCT/US2005/030453 WO2006026452A1 (en) 2004-08-25 2005-08-24 Multichannel decorrelation in spatial audio coding

Publications (2)

Publication Number Publication Date
BRPI0514620A true BRPI0514620A (pt) 2008-06-17
BRPI0514620A8 BRPI0514620A8 (pt) 2018-07-31

Family

ID=35448169

Family Applications (1)

Application Number Title Priority Date Filing Date
BRPI0514620A BRPI0514620A8 (pt) 2004-08-25 2005-08-24 Método e aparelho para processar um conjunto de n sinais de áudio

Country Status (15)

Country Link
US (1) US8015018B2 (pt)
EP (1) EP1782417B1 (pt)
JP (1) JP4909272B2 (pt)
KR (1) KR101178060B1 (pt)
CN (1) CN101010723B (pt)
AT (1) ATE447756T1 (pt)
AU (1) AU2005280041B2 (pt)
BR (1) BRPI0514620A8 (pt)
CA (1) CA2576739C (pt)
DE (1) DE602005017502D1 (pt)
IL (1) IL181406A (pt)
MX (1) MX2007001949A (pt)
MY (1) MY143850A (pt)
TW (1) TWI393121B (pt)
WO (1) WO2006026452A1 (pt)

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Also Published As

Publication number Publication date
TWI393121B (zh) 2013-04-11
CA2576739C (en) 2013-08-13
TW200611241A (en) 2006-04-01
JP2008511044A (ja) 2008-04-10
AU2005280041A1 (en) 2006-03-09
IL181406A0 (en) 2007-07-04
AU2005280041B2 (en) 2010-04-22
EP1782417A1 (en) 2007-05-09
ATE447756T1 (de) 2009-11-15
CA2576739A1 (en) 2006-03-09
MY143850A (en) 2011-07-15
BRPI0514620A8 (pt) 2018-07-31
IL181406A (en) 2011-04-28
CN101010723B (zh) 2011-05-18
MX2007001949A (es) 2007-04-23
JP4909272B2 (ja) 2012-04-04
KR20070051856A (ko) 2007-05-18
KR101178060B1 (ko) 2012-08-30
CN101010723A (zh) 2007-08-01
DE602005017502D1 (de) 2009-12-17
US20080126104A1 (en) 2008-05-29
HK1099839A1 (en) 2007-08-24
WO2006026452A1 (en) 2006-03-09
US8015018B2 (en) 2011-09-06
EP1782417B1 (en) 2009-11-04

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