BR0016741A - Método e aparelho para derivar pelo menos um sinal de áudio a partir de dois ou mais sinais de áudio de entrada - Google Patents

Método e aparelho para derivar pelo menos um sinal de áudio a partir de dois ou mais sinais de áudio de entrada

Info

Publication number
BR0016741A
BR0016741A BR0016741-0A BR0016741A BR0016741A BR 0016741 A BR0016741 A BR 0016741A BR 0016741 A BR0016741 A BR 0016741A BR 0016741 A BR0016741 A BR 0016741A
Authority
BR
Brazil
Prior art keywords
signals
signal
output
audio
antidominant
Prior art date
Application number
BR0016741-0A
Other languages
English (en)
Inventor
Kenneth J Gundry
James W Fosgate
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
Priority claimed from US09/532,711 external-priority patent/US6920223B1/en
Application filed by Dolby Lab Licensing Corp filed Critical Dolby Lab Licensing Corp
Publication of BR0016741A publication Critical patent/BR0016741A/pt

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S3/00—Systems employing more than two channels, e.g. quadraphonic
    • H04S3/02—Systems employing more than two channels, e.g. quadraphonic of the matrix type, i.e. in which input signals are combined algebraically, e.g. after having been phase shifted with respect to each other

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Mathematical Analysis (AREA)
  • Mathematical Optimization (AREA)
  • Mathematical Physics (AREA)
  • Pure & Applied Mathematics (AREA)
  • Algebra (AREA)
  • General Physics & Mathematics (AREA)
  • Signal Processing (AREA)
  • Stereophonic System (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Signal Processing Not Specific To The Method Of Recording And Reproducing (AREA)
  • Analogue/Digital Conversion (AREA)
  • Toys (AREA)
  • Stereo-Broadcasting Methods (AREA)

Abstract

"MéTODO E APARELHO PARA DERIVAR PELO MENOS UM SINAL DE áUDIO A PARTIR DE DOIS OU MAIS SINAIS DE áUDIO DE ENTRADA". Um decodificador de áudio multidirecional utilizando uma matriz de áudio "adaptável" deriva pelo menos um de uma pluralidade de sinais de áudio de saída a partir de dois ou mais fluxos de sinais de entrada de áudio direcionalmente codificados (S1 (<244>), S2(<244>), ..., SN(<244>)), onde <244> é o ângulo codificado de um sinal de áudio fonte. Cada sinal de saída é associado com uma direção principal <225>. De modo a gerar cada sinal de saída, um par de sinais intermediários (sinais "antidominantes") é gerado, constituindo o sinal antidominante para cada uma das duas direções de saída principal do decodificador. O sinal antidominante para qualquer direção principal (ou "dominante") arbitrária é a combinação dos sinais de entrada possuindo coeficientes de modo que a combinação vai para zero para esta direção dominante. O controle de amplitude é aplicado junto aos dois sinais antidominantes para entregar um par de sinais possuindo magnitudes substancialmente iguais que são aditivamente ou subtrativamente combinados para proporcionar o sinal de áudio de saída associado com uma direção principal.
BR0016741-0A 1999-12-03 2000-11-29 Método e aparelho para derivar pelo menos um sinal de áudio a partir de dois ou mais sinais de áudio de entrada BR0016741A (pt)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US45481099A 1999-12-03 1999-12-03
US09/532,711 US6920223B1 (en) 1999-12-03 2000-03-22 Method for deriving at least three audio signals from two input audio signals
US09/602,585 US6970567B1 (en) 1999-12-03 2000-06-21 Method and apparatus for deriving at least one audio signal from two or more input audio signals
PCT/US2000/032537 WO2001041505A1 (en) 1999-12-03 2000-11-29 Method and apparatus for deriving at least one audio signal from two or more input audio signals

Publications (1)

Publication Number Publication Date
BR0016741A true BR0016741A (pt) 2002-09-03

Family

ID=27412620

Family Applications (1)

Application Number Title Priority Date Filing Date
BR0016741-0A BR0016741A (pt) 1999-12-03 2000-11-29 Método e aparelho para derivar pelo menos um sinal de áudio a partir de dois ou mais sinais de áudio de entrada

Country Status (13)

Country Link
US (1) US6970567B1 (pt)
EP (1) EP1234485B1 (pt)
JP (1) JP2003515771A (pt)
CN (1) CN1250046C (pt)
AT (1) ATE301384T1 (pt)
AU (1) AU784083B2 (pt)
BR (1) BR0016741A (pt)
CA (1) CA2392602A1 (pt)
DE (1) DE60021756T2 (pt)
HK (1) HK1054838B (pt)
MX (1) MXPA02005520A (pt)
TW (1) TW506227B (pt)
WO (1) WO2001041505A1 (pt)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TW576122B (en) 2000-08-31 2004-02-11 Dolby Lab Licensing Corp Method for apparatus for audio matrix decoding
US7003467B1 (en) 2000-10-06 2006-02-21 Digital Theater Systems, Inc. Method of decoding two-channel matrix encoded audio to reconstruct multichannel audio
KR101079066B1 (ko) 2004-03-01 2011-11-02 돌비 레버러토리즈 라이쎈싱 코오포레이션 멀티채널 오디오 코딩
KR101158698B1 (ko) * 2004-04-05 2012-06-22 코닌클리케 필립스 일렉트로닉스 엔.브이. 복수-채널 인코더, 입력 신호를 인코딩하는 방법, 저장 매체, 및 인코딩된 출력 데이터를 디코딩하도록 작동하는 디코더
JP4594681B2 (ja) * 2004-09-08 2010-12-08 ソニー株式会社 音声信号処理装置および音声信号処理方法
JP4580210B2 (ja) * 2004-10-19 2010-11-10 ソニー株式会社 音声信号処理装置および音声信号処理方法
US8111830B2 (en) * 2005-12-19 2012-02-07 Samsung Electronics Co., Ltd. Method and apparatus to provide active audio matrix decoding based on the positions of speakers and a listener
FR2916078A1 (fr) * 2007-05-10 2008-11-14 France Telecom Procede de codage et decodage audio, codeur audio, decodeur audio et programmes d'ordinateur associes
EP2232700B1 (en) 2007-12-21 2014-08-13 Dts Llc System for adjusting perceived loudness of audio signals
TWI424755B (zh) * 2008-01-11 2014-01-21 Dolby Lab Licensing Corp 矩陣解碼器
TWI449442B (zh) 2009-01-14 2014-08-11 Dolby Lab Licensing Corp 用於無回授之頻域主動矩陣解碼的方法與系統
US8538042B2 (en) 2009-08-11 2013-09-17 Dts Llc System for increasing perceived loudness of speakers
WO2013094135A1 (ja) 2011-12-19 2013-06-27 パナソニック株式会社 音分離装置、および音分離方法
US9312829B2 (en) 2012-04-12 2016-04-12 Dts Llc System for adjusting loudness of audio signals in real time

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4589129A (en) 1984-02-21 1986-05-13 Kintek, Inc. Signal decoding system
US4799260A (en) 1985-03-07 1989-01-17 Dolby Laboratories Licensing Corporation Variable matrix decoder
US5295189A (en) 1990-06-08 1994-03-15 Fosgate James W Control voltage generator for surround sound processor
US5504819A (en) 1990-06-08 1996-04-02 Harman International Industries, Inc. Surround sound processor with improved control voltage generator
US5172415A (en) 1990-06-08 1992-12-15 Fosgate James W Surround processor
US5625696A (en) 1990-06-08 1997-04-29 Harman International Industries, Inc. Six-axis surround sound processor with improved matrix and cancellation control
US5428687A (en) 1990-06-08 1995-06-27 James W. Fosgate Control voltage generator multiplier and one-shot for integrated surround sound processor
JP3472046B2 (ja) 1996-08-23 2003-12-02 株式会社国際電気通信基礎技術研究所 信号分離装置
US5862228A (en) 1997-02-21 1999-01-19 Dolby Laboratories Licensing Corporation Audio matrix encoding
US6198826B1 (en) 1997-05-19 2001-03-06 Qsound Labs, Inc. Qsound surround synthesis from stereo

Also Published As

Publication number Publication date
US6970567B1 (en) 2005-11-29
WO2001041505A1 (en) 2001-06-07
HK1054838A1 (en) 2003-12-12
HK1054838B (zh) 2006-09-08
AU2051801A (en) 2001-06-12
MXPA02005520A (es) 2002-10-23
JP2003515771A (ja) 2003-05-07
ATE301384T1 (de) 2005-08-15
DE60021756D1 (de) 2005-09-08
TW506227B (en) 2002-10-11
DE60021756T2 (de) 2006-04-20
EP1234485A1 (en) 2002-08-28
AU784083B2 (en) 2006-02-02
CN1402957A (zh) 2003-03-12
EP1234485B1 (en) 2005-08-03
CN1250046C (zh) 2006-04-05
CA2392602A1 (en) 2001-06-07

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Legal Events

Date Code Title Description
B11A Dismissal acc. art.33 of ipl - examination not requested within 36 months of filing
B11Y Definitive dismissal - extension of time limit for request of examination expired [chapter 11.1.1 patent gazette]