WO2005034081A3 - A method for grouping short windows in audio encoding - Google Patents

A method for grouping short windows in audio encoding Download PDF

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Publication number
WO2005034081A3
WO2005034081A3 PCT/US2004/031585 US2004031585W WO2005034081A3 WO 2005034081 A3 WO2005034081 A3 WO 2005034081A3 US 2004031585 W US2004031585 W US 2004031585W WO 2005034081 A3 WO2005034081 A3 WO 2005034081A3
Authority
WO
WIPO (PCT)
Prior art keywords
windows
type
short
short windows
audio encoding
Prior art date
Application number
PCT/US2004/031585
Other languages
French (fr)
Other versions
WO2005034081A2 (en
Inventor
Jeongnam Youn
Original Assignee
Sony Electronics Inc
Jeongnam Youn
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 Sony Electronics Inc, Jeongnam Youn filed Critical Sony Electronics Inc
Priority to JP2006533992A priority Critical patent/JP4750707B2/en
Priority to EP04785096A priority patent/EP1673765B1/en
Priority to DE602004024811T priority patent/DE602004024811D1/en
Priority to CN2004800282430A priority patent/CN1918629B/en
Priority to KR1020067005398A priority patent/KR101102016B1/en
Publication of WO2005034081A2 publication Critical patent/WO2005034081A2/en
Publication of WO2005034081A3 publication Critical patent/WO2005034081A3/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
    • G10L19/02—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 using spectral analysis, e.g. transform vocoders or subband vocoders
    • G10L19/022—Blocking, i.e. grouping of samples in time; Choice of analysis windows; Overlap factoring
    • G10L19/025—Detection of transients or attacks for time/frequency resolution switching
    • 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
    • G10L19/02—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 using spectral analysis, e.g. transform vocoders or subband vocoders
    • G10L19/022—Blocking, i.e. grouping of samples in time; Choice of analysis windows; Overlap factoring

Abstract

Windows of the first type and windows of the second type are identified within a frame using energy associated with each short window within the frame. The short windows of the first type and the short windows of the second type are then grouped into two preliminary groups based on the window type of each short window. Further, if the number of short windows in any of the two preliminary groups exceeds a threshold number, the short windows in this large preliminary group are further grouped into at least two more groups.
PCT/US2004/031585 2003-09-29 2004-09-27 A method for grouping short windows in audio encoding WO2005034081A2 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP2006533992A JP4750707B2 (en) 2003-09-29 2004-09-27 Short window grouping method in audio coding
EP04785096A EP1673765B1 (en) 2003-09-29 2004-09-27 A method for grouping short windows in audio encoding
DE602004024811T DE602004024811D1 (en) 2003-09-29 2004-09-27 A METHOD FOR GROUPING SHORT WINDOWS IN AUDIO CODING
CN2004800282430A CN1918629B (en) 2003-09-29 2004-09-27 A method for grouping short windows in audio encoding
KR1020067005398A KR101102016B1 (en) 2003-09-29 2004-09-27 A method for grouping short windows in audio encoding

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US10/674,982 2003-09-29
US10/674,982 US7283968B2 (en) 2003-09-29 2003-09-29 Method for grouping short windows in audio encoding

Publications (2)

Publication Number Publication Date
WO2005034081A2 WO2005034081A2 (en) 2005-04-14
WO2005034081A3 true WO2005034081A3 (en) 2006-04-27

Family

ID=34393518

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2004/031585 WO2005034081A2 (en) 2003-09-29 2004-09-27 A method for grouping short windows in audio encoding

Country Status (7)

Country Link
US (1) US7283968B2 (en)
EP (1) EP1673765B1 (en)
JP (1) JP4750707B2 (en)
KR (1) KR101102016B1 (en)
CN (1) CN1918629B (en)
DE (1) DE602004024811D1 (en)
WO (1) WO2005034081A2 (en)

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CN101751928B (en) * 2008-12-08 2012-06-13 扬智科技股份有限公司 Method for simplifying acoustic model analysis through applying audio frame frequency spectrum flatness and device thereof
KR101297026B1 (en) * 2009-05-19 2013-08-14 광운대학교 산학협력단 Apparatus and method for processing window for interlocking between mdct-tcx frame and celp frame
CN103325373A (en) 2012-03-23 2013-09-25 杜比实验室特许公司 Method and equipment for transmitting and receiving sound signal
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Also Published As

Publication number Publication date
EP1673765A4 (en) 2008-12-31
EP1673765A2 (en) 2006-06-28
US7283968B2 (en) 2007-10-16
CN1918629B (en) 2010-05-26
EP1673765B1 (en) 2009-12-23
WO2005034081A2 (en) 2005-04-14
DE602004024811D1 (en) 2010-02-04
KR20060131732A (en) 2006-12-20
JP4750707B2 (en) 2011-08-17
US20050075861A1 (en) 2005-04-07
JP2007507751A (en) 2007-03-29
KR101102016B1 (en) 2012-01-04
CN1918629A (en) 2007-02-21

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