WO2007072394A3 - Audio structure analysis - Google Patents

Audio structure analysis Download PDF

Info

Publication number
WO2007072394A3
WO2007072394A3 PCT/IB2006/054915 IB2006054915W WO2007072394A3 WO 2007072394 A3 WO2007072394 A3 WO 2007072394A3 IB 2006054915 W IB2006054915 W IB 2006054915W WO 2007072394 A3 WO2007072394 A3 WO 2007072394A3
Authority
WO
WIPO (PCT)
Prior art keywords
energy
similarity
determining
determined
selecting
Prior art date
Application number
PCT/IB2006/054915
Other languages
French (fr)
Other versions
WO2007072394A2 (en
Inventor
Aweke N Lemma
Original Assignee
Koninkl Philips Electronics Nv
Aweke N Lemma
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 Koninkl Philips Electronics Nv, Aweke N Lemma filed Critical Koninkl Philips Electronics Nv
Publication of WO2007072394A2 publication Critical patent/WO2007072394A2/en
Publication of WO2007072394A3 publication Critical patent/WO2007072394A3/en

Links

Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10H—ELECTROPHONIC MUSICAL INSTRUMENTS; INSTRUMENTS IN WHICH THE TONES ARE GENERATED BY ELECTROMECHANICAL MEANS OR ELECTRONIC GENERATORS, OR IN WHICH THE TONES ARE SYNTHESISED FROM A DATA STORE
    • G10H1/00—Details of electrophonic musical instruments
    • G10H1/36—Accompaniment arrangements
    • G10H1/40—Rhythm
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
    • G10L25/00—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00
    • G10L25/48—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00 specially adapted for particular use
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10H—ELECTROPHONIC MUSICAL INSTRUMENTS; INSTRUMENTS IN WHICH THE TONES ARE GENERATED BY ELECTROMECHANICAL MEANS OR ELECTRONIC GENERATORS, OR IN WHICH THE TONES ARE SYNTHESISED FROM A DATA STORE
    • G10H2210/00—Aspects or methods of musical processing having intrinsic musical character, i.e. involving musical theory or musical parameters or relying on musical knowledge, as applied in electrophonic musical tools or instruments
    • G10H2210/031—Musical analysis, i.e. isolation, extraction or identification of musical elements or musical parameters from a raw acoustic signal or from an encoded audio signal
    • G10H2210/076—Musical analysis, i.e. isolation, extraction or identification of musical elements or musical parameters from a raw acoustic signal or from an encoded audio signal for extraction of timing, tempo; Beat detection
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10H—ELECTROPHONIC MUSICAL INSTRUMENTS; INSTRUMENTS IN WHICH THE TONES ARE GENERATED BY ELECTROMECHANICAL MEANS OR ELECTRONIC GENERATORS, OR IN WHICH THE TONES ARE SYNTHESISED FROM A DATA STORE
    • G10H2220/00—Input/output interfacing specifically adapted for electrophonic musical tools or instruments
    • G10H2220/021—Indicator, i.e. non-screen output user interfacing, e.g. visual or tactile instrument status or guidance information using lights, LEDs, seven segments displays
    • G10H2220/081—Beat indicator, e.g. marks or flashing LEDs to indicate tempo or beat positions
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10H—ELECTROPHONIC MUSICAL INSTRUMENTS; INSTRUMENTS IN WHICH THE TONES ARE GENERATED BY ELECTROMECHANICAL MEANS OR ELECTRONIC GENERATORS, OR IN WHICH THE TONES ARE SYNTHESISED FROM A DATA STORE
    • G10H2250/00—Aspects of algorithms or signal processing methods without intrinsic musical character, yet specifically adapted for or used in electrophonic musical processing
    • G10H2250/131—Mathematical functions for musical analysis, processing, synthesis or composition
    • G10H2250/135—Autocorrelation

Abstract

A device (1) for determining accented beats in a music signal (x[n]) comprises: energy determination means (12) for determining the energy (E[n]; E[k]) of the music signal (x[n]), - segmentation means (15) for segmenting the energy on the basis of a tempo estimate (T), similarity determination means (17) for determining the similarity between the energy (E[n]; E[k]) of segments, and selecting means (18) for selecting the segment having the smallest similarity as the segment containing an accented beat. The tempo estimate (T) may be determined by external means. The energy may be determined in the time domain or in a transform domain. The similarity may be determined using cross-correlation, entropy or a distance measure. The device (1) may advantageously be used in AutoDJ apparatus.
PCT/IB2006/054915 2005-12-22 2006-12-18 Audio structure analysis WO2007072394A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP05112778 2005-12-22
EP05112778.5 2005-12-22

Publications (2)

Publication Number Publication Date
WO2007072394A2 WO2007072394A2 (en) 2007-06-28
WO2007072394A3 true WO2007072394A3 (en) 2007-10-18

Family

ID=38137441

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2006/054915 WO2007072394A2 (en) 2005-12-22 2006-12-18 Audio structure analysis

Country Status (1)

Country Link
WO (1) WO2007072394A2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101740013A (en) * 2008-11-21 2010-06-16 索尼株式会社 Information processing apparatus, sound analysis method, and program
CN101740010B (en) * 2008-11-21 2012-12-26 索尼株式会社 Information processing device, sound analyzing method

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007036846A2 (en) * 2005-09-30 2007-04-05 Koninklijke Philips Electronics N.V. Method and apparatus for automatic structure analysis of music
DE102009031673A1 (en) * 2009-02-13 2010-08-26 Kajetan Dvoracek Method for determining clock speed of electrical signals for e.g. pulse frequency-oriented sports activity, involves supplementing maximum value if necessary, and determining clock speed of piece of music from period values
CN104217729A (en) 2013-05-31 2014-12-17 杜比实验室特许公司 Audio processing method, audio processing device and training method
CN108320730B (en) * 2018-01-09 2020-09-29 广州市百果园信息技术有限公司 Music classification method, beat point detection method, storage device and computer device

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6316712B1 (en) * 1999-01-25 2001-11-13 Creative Technology Ltd. Method and apparatus for tempo and downbeat detection and alteration of rhythm in a musical segment
US6542869B1 (en) * 2000-05-11 2003-04-01 Fuji Xerox Co., Ltd. Method for automatic analysis of audio including music and speech
US20050211072A1 (en) * 2004-03-25 2005-09-29 Microsoft Corporation Beat analysis of musical signals

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6316712B1 (en) * 1999-01-25 2001-11-13 Creative Technology Ltd. Method and apparatus for tempo and downbeat detection and alteration of rhythm in a musical segment
US6542869B1 (en) * 2000-05-11 2003-04-01 Fuji Xerox Co., Ltd. Method for automatic analysis of audio including music and speech
US20050211072A1 (en) * 2004-03-25 2005-09-29 Microsoft Corporation Beat analysis of musical signals

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
GOTO M ET AL: "Real-time beat tracking for drumless audio signals: Chord change detection for musical decisions", SPEECH COMMUNICATION, ELSEVIER SCIENCE PUBLISHERS, AMSTERDAM, NL, vol. 27, no. 3-4, April 1999 (1999-04-01), pages 311 - 335, XP004163257, ISSN: 0167-6393 *
SCHEIRER ERIC D: "Tempo and beat analysis of acoustic musical signals", JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA, AIP / ACOUSTICAL SOCIETY OF AMERICA, MELVILLE, NY, US, vol. 103, no. 1, January 1998 (1998-01-01), pages 588 - 601, XP012000051, ISSN: 0001-4966 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101740013A (en) * 2008-11-21 2010-06-16 索尼株式会社 Information processing apparatus, sound analysis method, and program
CN101740010B (en) * 2008-11-21 2012-12-26 索尼株式会社 Information processing device, sound analyzing method
CN101740013B (en) * 2008-11-21 2012-12-26 索尼株式会社 Information processing apparatus, sound analysis method

Also Published As

Publication number Publication date
WO2007072394A2 (en) 2007-06-28

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