TW200746872A - Low-complexity audio matrix decoder - Google Patents

Low-complexity audio matrix decoder

Info

Publication number
TW200746872A
TW200746872A TW095138970A TW95138970A TW200746872A TW 200746872 A TW200746872 A TW 200746872A TW 095138970 A TW095138970 A TW 095138970A TW 95138970 A TW95138970 A TW 95138970A TW 200746872 A TW200746872 A TW 200746872A
Authority
TW
Taiwan
Prior art keywords
signals
audio
directional
response
produces
Prior art date
Application number
TW095138970A
Other languages
Chinese (zh)
Other versions
TWI420918B (en
Inventor
Ching-Wei Chen
Christophe Chabanne
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 TW200746872A publication Critical patent/TW200746872A/en
Application granted granted Critical
Publication of TWI420918B publication Critical patent/TWI420918B/en

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)
  • 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

A method for processing audio signals includes: (a) 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 (ii) a processor or process that produces the control signals in response to the directional dominance signals.
TW95138970A 2005-12-02 2006-10-23 Low-complexity audio matrix decoder TWI420918B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US74156705P 2005-12-02 2005-12-02

Publications (2)

Publication Number Publication Date
TW200746872A true TW200746872A (en) 2007-12-16
TWI420918B TWI420918B (en) 2013-12-21

Family

ID=37735788

Family Applications (1)

Application Number Title Priority Date Filing Date
TW95138970A TWI420918B (en) 2005-12-02 2006-10-23 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)

* Cited by examiner, † Cited by third party
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
RU2595910C2 (en) 2011-06-24 2016-08-27 Конинклейке Филипс Н.В. Audio signal processor for processing encoded multi-channel audio signals and method therefor
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
EP3729642A1 (en) * 2017-12-20 2020-10-28 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

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5240563B2 (en) * 1972-03-07 1977-10-13
US4799260A (en) * 1985-03-07 1989-01-17 Dolby Laboratories Licensing Corporation Variable matrix decoder
US5666424A (en) * 1990-06-08 1997-09-09 Harman International Industries, Inc. Six-axis surround sound processor with automatic balancing and calibration
FI102799B (en) * 1993-06-15 1999-02-15 Nokia Technology Gmbh Improved Dolby Prologic decoder
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
PL338988A1 (en) * 1997-09-05 2000-12-04 Lexicon Matrix-type 5-2-5 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
EP1472905A2 (en) * 2002-01-17 2004-11-03 Koninklijke Philips Electronics N.V. 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
ES2324926T3 (en) * 2004-03-01 2009-08-19 Dolby Laboratories Licensing Corporation MULTICHANNEL AUDIO DECODING.

Also Published As

Publication number Publication date
TWI420918B (en) 2013-12-21
EP1964443A2 (en) 2008-09-03
WO2007067320A3 (en) 2007-11-01
CN101336563A (en) 2008-12-31
WO2007067320A2 (en) 2007-06-14
EP1964443B1 (en) 2011-09-21
CN101336563B (en) 2012-02-15
HK1123663A1 (en) 2009-06-19

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