WO2007067320A3 - Low-complexity audio matrix decoder - Google Patents
Low-complexity audio matrix decoder Download PDFInfo
- Publication number
- WO2007067320A3 WO2007067320A3 PCT/US2006/044447 US2006044447W WO2007067320A3 WO 2007067320 A3 WO2007067320 A3 WO 2007067320A3 US 2006044447 W US2006044447 W US 2006044447W WO 2007067320 A3 WO2007067320 A3 WO 2007067320A3
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- signals
- audio
- directional
- response
- low
- Prior art date
Links
- 239000011159 matrix material Substances 0.000 title abstract 3
- 230000005236 sound signal Effects 0.000 abstract 3
- 230000003044 adaptive effect Effects 0.000 abstract 1
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)
- Algebra (AREA)
- General Physics & Mathematics (AREA)
- Mathematical Analysis (AREA)
- Mathematical Optimization (AREA)
- Mathematical Physics (AREA)
- Pure & Applied Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Stereophonic System (AREA)
Abstract
Deriving n audio output signals from m audio input signals, where m and n are positive whole integers and the n audio output signals are derived using an adaptive matrix or matrixing process responsive to one or more control signals, which matrix or matrixing process produces n audio signals in response to m audio signals, and (b) deriving a plurality of time- varying control signals from the m audio input signals, wherein the control signals are derived from the m input audio signals using (i) a processor or process that produces a plurality of directional dominance signals in response to the m audio input signals, at least one directional dominance signal relating to a first directional axis and at least one other directional dominance signal relating to a second directional axis, and (iÊ) a processor or process that produces the control signals in response to the directional dominance signals.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP06837740A EP1964443B1 (en) | 2005-12-02 | 2006-11-16 | Low-complexity audio matrix decoder |
| CN2006800519731A CN101336563B (en) | 2005-12-02 | 2006-11-16 | Low-complexity audio matrix decoder |
| HK09101179.2A HK1123663A1 (en) | 2005-12-02 | 2009-02-10 | Low-complexity audio matrix decoder |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US74156705P | 2005-12-02 | 2005-12-02 | |
| US60/741,567 | 2005-12-02 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO2007067320A2 WO2007067320A2 (en) | 2007-06-14 |
| WO2007067320A3 true WO2007067320A3 (en) | 2007-11-01 |
Family
ID=37735788
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/US2006/044447 WO2007067320A2 (en) | 2005-12-02 | 2006-11-16 | Low-complexity audio matrix decoder |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP1964443B1 (en) |
| CN (1) | CN101336563B (en) |
| HK (1) | HK1123663A1 (en) |
| TW (1) | TWI420918B (en) |
| WO (1) | WO2007067320A2 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI424755B (en) * | 2008-01-11 | 2014-01-21 | Dolby Lab Licensing Corp | Matrix decoder |
| CN102104451A (en) * | 2009-12-17 | 2011-06-22 | 上海电机学院 | Multi-user receiving and transmitting combined precoding method and device in multi-input multi-output system |
| CN102802112B (en) * | 2011-05-24 | 2014-08-13 | 鸿富锦精密工业（深圳）有限公司 | Electronic device with audio file format conversion function |
| CN103620673B (en) | 2011-06-24 | 2016-04-27 | 皇家飞利浦有限公司 | Audio signal processor for the treatment of encoded multi-channel audio signal and the method for audio signal processor |
| CN106604199B (en) * | 2016-12-23 | 2018-09-18 | 湖南国科微电子股份有限公司 | A kind of matrix disposal method and device of digital audio and video signals |
| US11095264B2 (en) * | 2017-12-20 | 2021-08-17 | Dolby Laboratories Licensing Corporation | Configurable modal amplifier system |
| US10904690B1 (en) * | 2019-12-15 | 2021-01-26 | Nuvoton Technology Corporation | Energy and phase correlated audio channels mixer |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3864516A (en) * | 1972-03-07 | 1975-02-04 | Tokyo Shibaura Electric Co | Four-Channel Stereophonic Sound Reproducing System |
| US4799260A (en) * | 1985-03-07 | 1989-01-17 | Dolby Laboratories Licensing Corporation | Variable matrix decoder |
| EP0630168A1 (en) * | 1993-06-15 | 1994-12-21 | NOKIA TECHNOLOGY GmbH | Improved Dolby prologic decoder |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5666424A (en) * | 1990-06-08 | 1997-09-09 | Harman International Industries, Inc. | Six-axis surround sound processor with automatic balancing and calibration |
| TW247390B (en) * | 1994-04-29 | 1995-05-11 | Audio Products Int Corp | Apparatus and method for adjusting levels between channels of a sound system |
| US5912976A (en) * | 1996-11-07 | 1999-06-15 | Srs Labs, Inc. | Multi-channel audio enhancement system for use in recording and playback and methods for providing same |
| CN1214690C (en) * | 1997-09-05 | 2005-08-10 | 雷克西康公司 | 5-2-5 Matrix encoder and decoder system |
| US7254239B2 (en) * | 2001-02-09 | 2007-08-07 | Thx Ltd. | Sound system and method of sound reproduction |
| TW569551B (en) * | 2001-09-25 | 2004-01-01 | Roger Wallace Dressler | Method and apparatus for multichannel logic matrix decoding |
| US20050070243A1 (en) * | 2002-01-17 | 2005-03-31 | Schobben Daniel Willem Elisabeth | Multichannel echo canceller system using active audio matrix coefficients |
| US20050052457A1 (en) * | 2003-02-27 | 2005-03-10 | Neil Muncy | Apparatus for generating and displaying images for determining the quality of audio reproduction |
| US7949141B2 (en) * | 2003-11-12 | 2011-05-24 | Dolby Laboratories Licensing Corporation | Processing audio signals with head related transfer function filters and a reverberator |
| EP1914722B1 (en) * | 2004-03-01 | 2009-04-29 | Dolby Laboratories Licensing Corporation | Multichannel audio decoding |
-
2006
- 2006-10-23 TW TW95138970A patent/TWI420918B/en active
- 2006-11-16 WO PCT/US2006/044447 patent/WO2007067320A2/en active Application Filing
- 2006-11-16 EP EP06837740A patent/EP1964443B1/en active Active
- 2006-11-16 CN CN2006800519731A patent/CN101336563B/en active Active
-
2009
- 2009-02-10 HK HK09101179.2A patent/HK1123663A1/en unknown
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3864516A (en) * | 1972-03-07 | 1975-02-04 | Tokyo Shibaura Electric Co | Four-Channel Stereophonic Sound Reproducing System |
| US4799260A (en) * | 1985-03-07 | 1989-01-17 | Dolby Laboratories Licensing Corporation | Variable matrix decoder |
| EP0630168A1 (en) * | 1993-06-15 | 1994-12-21 | NOKIA TECHNOLOGY GmbH | Improved Dolby prologic decoder |
Non-Patent Citations (1)
| Title |
|---|
| DOLBY PRO LOGIC SURROUND DECODER PRINCIPLES OF OPERATION, XP002421954, Retrieved from the Internet <URL:http://web.archive.org/web/19961018090112/www.dolby.com/ht/ds&pl/whtppr.html> [retrieved on 19961018] * |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1964443A2 (en) | 2008-09-03 |
| EP1964443B1 (en) | 2011-09-21 |
| WO2007067320A2 (en) | 2007-06-14 |
| CN101336563A (en) | 2008-12-31 |
| CN101336563B (en) | 2012-02-15 |
| TW200746872A (en) | 2007-12-16 |
| HK1123663A1 (en) | 2009-06-19 |
| TWI420918B (en) | 2013-12-21 |
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