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 entradaInfo
- 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
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.
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1362499B1 (en) | 2000-08-31 | 2012-02-15 | Dolby Laboratories Licensing Corporation | 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 |
DE602005005640T2 (de) | 2004-03-01 | 2009-05-14 | Dolby Laboratories Licensing Corp., San Francisco | Mehrkanalige audiocodierung |
WO2005098821A2 (en) * | 2004-04-05 | 2005-10-20 | Koninklijke Philips Electronics N.V. | Multi-channel encoder |
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)
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 |
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 |
US5504819A (en) | 1990-06-08 | 1996-04-02 | Harman International Industries, Inc. | Surround sound processor with improved control voltage generator |
US5428687A (en) | 1990-06-08 | 1995-06-27 | James W. Fosgate | Control voltage generator multiplier and one-shot for integrated surround sound processor |
US5295189A (en) | 1990-06-08 | 1994-03-15 | Fosgate James W | Control voltage generator for 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 |
-
2000
- 2000-06-21 US US09/602,585 patent/US6970567B1/en not_active Expired - Fee Related
- 2000-11-22 TW TW089124809A patent/TW506227B/zh not_active IP Right Cessation
- 2000-11-29 EP EP00983809A patent/EP1234485B1/en not_active Expired - Lifetime
- 2000-11-29 MX MXPA02005520A patent/MXPA02005520A/es active IP Right Grant
- 2000-11-29 DE DE60021756T patent/DE60021756T2/de not_active Expired - Fee Related
- 2000-11-29 WO PCT/US2000/032537 patent/WO2001041505A1/en active IP Right Grant
- 2000-11-29 AT AT00983809T patent/ATE301384T1/de not_active IP Right Cessation
- 2000-11-29 BR BR0016741-0A patent/BR0016741A/pt not_active Application Discontinuation
- 2000-11-29 JP JP2001541299A patent/JP2003515771A/ja not_active Withdrawn
- 2000-11-29 AU AU20518/01A patent/AU784083B2/en not_active Ceased
- 2000-11-29 CA CA002392602A patent/CA2392602A1/en not_active Abandoned
- 2000-11-29 CN CNB008165629A patent/CN1250046C/zh not_active Expired - Fee Related
-
2003
- 2003-07-09 HK HK03104927.7A patent/HK1054838B/zh not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
MXPA02005520A (es) | 2002-10-23 |
EP1234485B1 (en) | 2005-08-03 |
HK1054838B (zh) | 2006-09-08 |
WO2001041505A1 (en) | 2001-06-07 |
CN1250046C (zh) | 2006-04-05 |
ATE301384T1 (de) | 2005-08-15 |
CA2392602A1 (en) | 2001-06-07 |
CN1402957A (zh) | 2003-03-12 |
US6970567B1 (en) | 2005-11-29 |
DE60021756D1 (de) | 2005-09-08 |
AU2051801A (en) | 2001-06-12 |
JP2003515771A (ja) | 2003-05-07 |
DE60021756T2 (de) | 2006-04-20 |
AU784083B2 (en) | 2006-02-02 |
HK1054838A1 (en) | 2003-12-12 |
EP1234485A1 (en) | 2002-08-28 |
TW506227B (en) | 2002-10-11 |
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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] |