WO2003094369A3 - Multi-channel downmixing device - Google Patents

Multi-channel downmixing device Download PDF

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Publication number
WO2003094369A3
WO2003094369A3 PCT/US2003/013693 US0313693W WO03094369A3 WO 2003094369 A3 WO2003094369 A3 WO 2003094369A3 US 0313693 W US0313693 W US 0313693W WO 03094369 A3 WO03094369 A3 WO 03094369A3
Authority
WO
WIPO (PCT)
Prior art keywords
output
signal
mix
input signal
input
Prior art date
Application number
PCT/US2003/013693
Other languages
French (fr)
Other versions
WO2003094369A2 (en
Inventor
David H Griesinger
Original Assignee
Harman Int Ind
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 Harman Int Ind filed Critical Harman Int Ind
Priority to JP2004502485A priority Critical patent/JP4187719B2/en
Priority to CN038094991A priority patent/CN1650528B/en
Priority to AU2003264750A priority patent/AU2003264750A1/en
Priority to EP20030747645 priority patent/EP1502361B1/en
Priority to KR20047017645A priority patent/KR100635022B1/en
Priority to CA 2473343 priority patent/CA2473343C/en
Publication of WO2003094369A2 publication Critical patent/WO2003094369A2/en
Publication of WO2003094369A3 publication Critical patent/WO2003094369A3/en

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Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
    • G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
    • G10L19/008—Multichannel audio signal coding or decoding using interchannel correlation to reduce redundancy, e.g. joint-stereo, intensity-coding or matrixing
    • 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
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • 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 

Abstract

A method and system (100) are provided for generating one or more mix coefficients (ml, mr) for downmixing a multichannel input signal having a plurality of input channels (LI, CI, RI), to an output signal having a plurality of output channels (LO, RO). Mix coefficients may be generated responsive to a comparison of energy between the downmixed (output) signal and the input signal to the downmixer (100), such that energy and intended direction of the input signal are substantially preserved in the output signal. Further, the mix coefficient generation may preserve an intended direction of an input signal, for example, received at a surround input channel, in at least one output channel of the output signal. The mix coefficient values (ml', mr') may be generated in a test downmixter (104) environment. Additionally , one or more mix coefficients may be generated by retrieving predetermined mix coefficient values.
PCT/US2003/013693 2002-05-03 2003-05-02 Multi-channel downmixing device WO2003094369A2 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
JP2004502485A JP4187719B2 (en) 2002-05-03 2003-05-02 Multi-channel downmixing equipment
CN038094991A CN1650528B (en) 2002-05-03 2003-05-02 Multi-channel downmixing device
AU2003264750A AU2003264750A1 (en) 2002-05-03 2003-05-02 Multi-channel downmixing device
EP20030747645 EP1502361B1 (en) 2002-05-03 2003-05-02 Multi-channel downmixing device
KR20047017645A KR100635022B1 (en) 2002-05-03 2003-05-02 Multi-channel downmixing device
CA 2473343 CA2473343C (en) 2002-05-03 2003-05-02 Multichannel downmixing device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US37766102P 2002-05-03 2002-05-03
US60/377,661 2002-05-03

Publications (2)

Publication Number Publication Date
WO2003094369A2 WO2003094369A2 (en) 2003-11-13
WO2003094369A3 true WO2003094369A3 (en) 2004-03-25

Family

ID=29401545

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2003/013693 WO2003094369A2 (en) 2002-05-03 2003-05-02 Multi-channel downmixing device

Country Status (8)

Country Link
US (2) US7450727B2 (en)
EP (2) EP2879299B1 (en)
JP (1) JP4187719B2 (en)
KR (1) KR100635022B1 (en)
CN (1) CN1650528B (en)
AU (1) AU2003264750A1 (en)
CA (1) CA2473343C (en)
WO (1) WO2003094369A2 (en)

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Also Published As

Publication number Publication date
CN1650528B (en) 2013-05-22
AU2003264750A1 (en) 2003-11-17
EP1502361B1 (en) 2015-01-14
KR20040111570A (en) 2004-12-31
JP4187719B2 (en) 2008-11-26
KR100635022B1 (en) 2006-10-16
US20090028360A1 (en) 2009-01-29
EP2879299B1 (en) 2017-07-26
EP2879299A1 (en) 2015-06-03
CA2473343A1 (en) 2003-11-13
US20040032960A1 (en) 2004-02-19
US8363855B2 (en) 2013-01-29
EP1502361A4 (en) 2011-03-16
US7450727B2 (en) 2008-11-11
CA2473343C (en) 2012-03-27
EP1502361A2 (en) 2005-02-02
WO2003094369A2 (en) 2003-11-13
CN1650528A (en) 2005-08-03
JP2005523672A (en) 2005-08-04

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