WO2002093550A3 - Vorrichtung zum analysieren eines audiosignals hinsichtlich von rhythmusinformationen unter verwendung einer autokorrelationsfunktion - Google Patents

Vorrichtung zum analysieren eines audiosignals hinsichtlich von rhythmusinformationen unter verwendung einer autokorrelationsfunktion Download PDF

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Publication number
WO2002093550A3
WO2002093550A3 PCT/EP2002/005171 EP0205171W WO02093550A3 WO 2002093550 A3 WO2002093550 A3 WO 2002093550A3 EP 0205171 W EP0205171 W EP 0205171W WO 02093550 A3 WO02093550 A3 WO 02093550A3
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WO
WIPO (PCT)
Prior art keywords
auto
correlation function
audio signal
rhythm information
rhythm
Prior art date
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PCT/EP2002/005171
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English (en)
French (fr)
Other versions
WO2002093550A2 (de
Inventor
Juergen Herre
Jan Rohden
Christian Uhle
Markus Cremer
Original Assignee
Fraunhofer Ges Forschung
Juergen Herre
Jan Rohden
Christian Uhle
Markus Cremer
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 Fraunhofer Ges Forschung, Juergen Herre, Jan Rohden, Christian Uhle, Markus Cremer filed Critical Fraunhofer Ges Forschung
Priority to DE50202914T priority Critical patent/DE50202914D1/de
Priority to AT02742987T priority patent/ATE294440T1/de
Priority to EP02742987A priority patent/EP1371055B1/de
Publication of WO2002093550A2 publication Critical patent/WO2002093550A2/de
Publication of WO2002093550A3 publication Critical patent/WO2002093550A3/de
Priority to US10/713,691 priority patent/US7012183B2/en

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Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; 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
    • G10L19/0204—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 using subband decomposition
    • G10L19/0208—Subband vocoders
    • 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
    • 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
    • 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
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; 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
    • G10L25/03—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00 characterised by the type of extracted parameters
    • G10L25/06—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00 characterised by the type of extracted parameters the extracted parameters being correlation coefficients
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; 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
    • G10L25/90—Pitch determination of speech signals

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Computational Linguistics (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Human Computer Interaction (AREA)
  • Electrophonic Musical Instruments (AREA)

Abstract

Eine Vorrichtung zum Analysieren eines Audiosignals hinsichtlich von Rhythmusinformationen des Audiosignals unter Verwendung einer Autokorrelationsfunktion umfaßt eine Filterbank zum Zerlegen des Audiosignals in zumindest zwei Teil-bandsignale. Die Teilbandsignale werden hinsichtlich von Peri-odizitäten mittels einer Autokorrelationsfunktion untersucht (106a), um Rhythmus-Rohinformationen für die zumindest zwei Teilbandsignale zu erhalten. Um die Mehrdeutigkeiten der Auto-korrelationsfunktion für periodische Signale zu verringern oder zu eliminieren, werden die Rhythmus-Rohinformationen nachbearbeitet (121), um nachbearbeitete Rhythmus-Rohinformationen für das Teilbandsignal zu erhalten. Die Rhythmusinformationen des Audiosignals werden auf der Basis der nachbearbeiteten Rhythmus-Rohinformationen ermittelt (122). Durch die teilbandweise AKF-Nachverarbeitung werden AKF-Mehrdeutigkeiten bereits dort, wo sie entstehen, elimi-niert, bzw. werden Rhythmusanteile bei doppelten Tempi, die eine Autokorrelationsfunktionsverarbeitung normalerweise nicht liefert, hinzugefügt, so daß sich als Resultat eine robustere Bestimmung der Rhythmus-Informationen des Audiosignals ergibt.
PCT/EP2002/005171 2001-05-14 2002-05-10 Vorrichtung zum analysieren eines audiosignals hinsichtlich von rhythmusinformationen unter verwendung einer autokorrelationsfunktion WO2002093550A2 (de)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE50202914T DE50202914D1 (de) 2001-05-14 2002-05-10 Vorrichtung zum analysieren eines audiosignals hinsichtlich von rhythmusinformationen des audiosignals unter verwendung einer autokorrelationsfunktion
AT02742987T ATE294440T1 (de) 2001-05-14 2002-05-10 Vorrichtung zum analysieren eines audiosignals hinsichtlich von rhythmusinformationen des audiosignals unter verwendung einer autokorrelationsfunktion
EP02742987A EP1371055B1 (de) 2001-05-14 2002-05-10 Vorrichtung zum analysieren eines audiosignals hinsichtlich von rhythmusinformationen des audiosignals unter verwendung einer autokorrelationsfunktion
US10/713,691 US7012183B2 (en) 2001-05-14 2003-11-14 Apparatus for analyzing an audio signal with regard to rhythm information of the audio signal by using an autocorrelation function

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10123281.0 2001-05-14
DE10123281A DE10123281C1 (de) 2001-05-14 2001-05-14 Vorrichtung und Verfahren zum Analysieren eines Audiosignals hinsichtlich von Rhythmusinformationen des Audiosignals unter Verwendung einer Autokorrelationsfunktion

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US10/713,691 Continuation US7012183B2 (en) 2001-05-14 2003-11-14 Apparatus for analyzing an audio signal with regard to rhythm information of the audio signal by using an autocorrelation function

Publications (2)

Publication Number Publication Date
WO2002093550A2 WO2002093550A2 (de) 2002-11-21
WO2002093550A3 true WO2002093550A3 (de) 2003-02-27

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Country Status (6)

Country Link
US (1) US7012183B2 (de)
EP (1) EP1371055B1 (de)
AT (1) ATE294440T1 (de)
DE (2) DE10123281C1 (de)
ES (1) ES2240762T3 (de)
WO (1) WO2002093550A2 (de)

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Also Published As

Publication number Publication date
EP1371055B1 (de) 2005-04-27
ATE294440T1 (de) 2005-05-15
US7012183B2 (en) 2006-03-14
ES2240762T3 (es) 2005-10-16
WO2002093550A2 (de) 2002-11-21
DE10123281C1 (de) 2002-10-10
DE50202914D1 (de) 2005-06-02
EP1371055A2 (de) 2003-12-17
US20040094019A1 (en) 2004-05-20

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