ATE341923T1 - AUDIO CHANNEL CONVERSION - Google Patents

AUDIO CHANNEL CONVERSION

Info

Publication number
ATE341923T1
ATE341923T1 AT03770229T AT03770229T ATE341923T1 AT E341923 T1 ATE341923 T1 AT E341923T1 AT 03770229 T AT03770229 T AT 03770229T AT 03770229 T AT03770229 T AT 03770229T AT E341923 T1 ATE341923 T1 AT E341923T1
Authority
AT
Austria
Prior art keywords
input signals
correlation
signals
compact
variable matrix
Prior art date
Application number
AT03770229T
Other languages
German (de)
Inventor
Mark Franklin Davis
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
Application granted granted Critical
Publication of ATE341923T1 publication Critical patent/ATE341923T1/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S3/00—Systems employing more than two channels, e.g. quadraphonic
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S5/00—Pseudo-stereo systems, e.g. in which additional channel signals are derived from monophonic signals by means of phase shifting, time delay or reverberation 
    • H04S5/02—Pseudo-stereo systems, e.g. in which additional channel signals are derived from monophonic signals by means of phase shifting, time delay or reverberation  of the pseudo four-channel type, e.g. in which rear channel signals are derived from two-channel stereo signals

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • General Physics & Mathematics (AREA)
  • Mathematical Optimization (AREA)
  • Mathematical Physics (AREA)
  • Pure & Applied Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Mathematical Analysis (AREA)
  • Algebra (AREA)
  • Stereophonic System (AREA)
  • Machine Translation (AREA)
  • Stereo-Broadcasting Methods (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)

Abstract

Using an M:N variable matrix, M audio input signals, each associated with a direction, are translated to N audio output signals, each associated with a direction, wherein N is larger than M, M is two or more and N is a positive integer equal to three or more. The variable matrix is controlled in response to measures of: (1) the relative levels of the input signals, and (2) the cross-correlation of the input signals so that a soundfield generated by the output signals has a compact sound image in the direction of the spatial center of gravity of the input signals when the input signals are highly correlated, the image spreading from compact to broad as the correlation decreases and progressively splitting into multiple compact sound images, each in a direction associated with an input signal, as the correlation continues to decrease to highly uncorrelated.
AT03770229T 2002-08-07 2003-08-06 AUDIO CHANNEL CONVERSION ATE341923T1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US40198302P 2002-08-07 2002-08-07

Publications (1)

Publication Number Publication Date
ATE341923T1 true ATE341923T1 (en) 2006-10-15

Family

ID=33489220

Family Applications (1)

Application Number Title Priority Date Filing Date
AT03770229T ATE341923T1 (en) 2002-08-07 2003-08-06 AUDIO CHANNEL CONVERSION

Country Status (17)

Country Link
EP (1) EP1527655B1 (en)
JP (1) JP4434951B2 (en)
KR (1) KR100988293B1 (en)
CN (1) CN1672464B (en)
AT (1) ATE341923T1 (en)
AU (1) AU2003278704B2 (en)
BR (2) BRPI0305746B1 (en)
CA (1) CA2494454C (en)
DE (1) DE60308876T2 (en)
DK (1) DK1527655T3 (en)
ES (1) ES2271654T3 (en)
HK (1) HK1073963A1 (en)
IL (1) IL165941A (en)
MX (1) MXPA05001413A (en)
MY (1) MY139849A (en)
PL (1) PL373120A1 (en)
TW (1) TWI315828B (en)

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DE602005009244D1 (en) * 2004-11-23 2008-10-02 Koninkl Philips Electronics Nv DEVICE AND METHOD FOR PROCESSING AUDIO DATA, COMPUTER PROGRAM ELEMENT AND COMPUTER READABLE MEDIUM
TWI397901B (en) * 2004-12-21 2013-06-01 Dolby Lab Licensing Corp Method for controlling a particular loudness characteristic of an audio signal, and apparatus and computer program associated therewith
US8214220B2 (en) 2005-05-26 2012-07-03 Lg Electronics Inc. Method and apparatus for embedding spatial information and reproducing embedded signal for an audio signal
US8494667B2 (en) 2005-06-30 2013-07-23 Lg Electronics Inc. Apparatus for encoding and decoding audio signal and method thereof
EP1913578B1 (en) 2005-06-30 2012-08-01 LG Electronics Inc. Method and apparatus for decoding an audio signal
AU2006266655B2 (en) 2005-06-30 2009-08-20 Lg Electronics Inc. Apparatus for encoding and decoding audio signal and method thereof
US7788107B2 (en) 2005-08-30 2010-08-31 Lg Electronics Inc. Method for decoding an audio signal
US8577483B2 (en) 2005-08-30 2013-11-05 Lg Electronics, Inc. Method for decoding an audio signal
EP1938311B1 (en) 2005-08-30 2018-05-02 LG Electronics Inc. Apparatus for decoding audio signals and method thereof
US7987097B2 (en) 2005-08-30 2011-07-26 Lg Electronics Method for decoding an audio signal
US7672379B2 (en) 2005-10-05 2010-03-02 Lg Electronics Inc. Audio signal processing, encoding, and decoding
US7751485B2 (en) 2005-10-05 2010-07-06 Lg Electronics Inc. Signal processing using pilot based coding
KR100857115B1 (en) 2005-10-05 2008-09-05 엘지전자 주식회사 Method and apparatus for signal processing and encoding and decoding method, and apparatus therefor
US7646319B2 (en) 2005-10-05 2010-01-12 Lg Electronics Inc. Method and apparatus for signal processing and encoding and decoding method, and apparatus therefor
WO2007040353A1 (en) 2005-10-05 2007-04-12 Lg Electronics Inc. Method and apparatus for signal processing
US7696907B2 (en) 2005-10-05 2010-04-13 Lg Electronics Inc. Method and apparatus for signal processing and encoding and decoding method, and apparatus therefor
US7742913B2 (en) 2005-10-24 2010-06-22 Lg Electronics Inc. Removing time delays in signal paths
US7752053B2 (en) 2006-01-13 2010-07-06 Lg Electronics Inc. Audio signal processing using pilot based coding
US7965848B2 (en) 2006-03-29 2011-06-21 Dolby International Ab Reduced number of channels decoding
ATE557386T1 (en) * 2008-06-26 2012-05-15 France Telecom SPATIAL SYNTHESIS OF MULTI-CHANNEL SOUND SIGNALS
CN104837107B (en) 2008-12-18 2017-05-10 杜比实验室特许公司 Audio channel spatial translation
US9197978B2 (en) * 2009-03-31 2015-11-24 Panasonic Intellectual Property Management Co., Ltd. Sound reproduction apparatus and sound reproduction method
CN101527874B (en) * 2009-04-28 2011-03-23 张勤 Dynamic sound field system
TWI444989B (en) * 2010-01-22 2014-07-11 Dolby Lab Licensing Corp Using multichannel decorrelation for improved multichannel upmixing
WO2012042905A1 (en) * 2010-09-30 2012-04-05 パナソニック株式会社 Sound reproduction device and sound reproduction method
WO2013141768A1 (en) * 2012-03-22 2013-09-26 Dirac Research Ab Audio precompensation controller design using a variable set of support loudspeakers
EP2830051A3 (en) 2013-07-22 2015-03-04 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Audio encoder, audio decoder, methods and computer program using jointly encoded residual signals
EP2830332A3 (en) 2013-07-22 2015-03-11 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Method, signal processing unit, and computer program for mapping a plurality of input channels of an input channel configuration to output channels of an output channel configuration
RU2708441C2 (en) * 2015-06-24 2019-12-06 Сони Корпорейшн Audio processing device, method and program
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
US11019449B2 (en) * 2018-10-06 2021-05-25 Qualcomm Incorporated Six degrees of freedom and three degrees of freedom backward compatibility
AU2019392876B2 (en) * 2018-12-07 2023-04-27 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Apparatus, method and computer program for encoding, decoding, scene processing and other procedures related to DirAC based spatial audio coding using direct component compensation
TWI740206B (en) * 2019-09-16 2021-09-21 宏碁股份有限公司 Correction system and correction method of signal measurement
CN114327040A (en) * 2021-11-25 2022-04-12 歌尔股份有限公司 Vibration signal generation method, device, electronic device and storage medium

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US5659619A (en) * 1994-05-11 1997-08-19 Aureal Semiconductor, Inc. Three-dimensional virtual audio display employing reduced complexity imaging filters
US6009179A (en) * 1997-01-24 1999-12-28 Sony Corporation Method and apparatus for electronically embedding directional cues in two channels of sound
US6072878A (en) * 1997-09-24 2000-06-06 Sonic Solutions Multi-channel surround sound mastering and reproduction techniques that preserve spatial harmonics
AUPP271598A0 (en) * 1998-03-31 1998-04-23 Lake Dsp Pty Limited Headtracked processing for headtracked playback of audio signals
EP1054575A3 (en) * 1999-05-17 2002-09-18 Bose Corporation Directional decoding

Also Published As

Publication number Publication date
BR0305746A (en) 2004-12-07
JP2005535266A (en) 2005-11-17
DE60308876T2 (en) 2007-03-01
IL165941A0 (en) 2006-01-15
MY139849A (en) 2009-11-30
JP4434951B2 (en) 2010-03-17
AU2003278704B2 (en) 2009-04-23
TWI315828B (en) 2009-10-11
CA2494454C (en) 2013-10-01
MXPA05001413A (en) 2005-06-06
CA2494454A1 (en) 2004-03-04
KR100988293B1 (en) 2010-10-18
PL373120A1 (en) 2005-08-08
KR20050035878A (en) 2005-04-19
DE60308876D1 (en) 2006-11-16
EP1527655A2 (en) 2005-05-04
ES2271654T3 (en) 2007-04-16
IL165941A (en) 2010-06-30
DK1527655T3 (en) 2007-01-29
HK1073963A1 (en) 2005-10-21
TW200404222A (en) 2004-03-16
AU2003278704A1 (en) 2004-03-11
CN1672464A (en) 2005-09-21
EP1527655B1 (en) 2006-10-04
BRPI0305746B1 (en) 2018-03-20
CN1672464B (en) 2010-07-28

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