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Audio Representation

  • Reference work entry
Encyclopedia of Database Systems

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Synonyms

Audio feature extraction; Audio characterization

Definition

An audio signal is a signal that contains information in the audible frequency range. Audio representation refers to the extraction of audio signal properties, or features, that are representative of the audio signal composition (both in temporal and spectral domain) and audio signal behavior over time. Feature extraction is typically combined with feature selection, through which the best set of features for the intended operation on the audio signal is defined.

Historical Background

Audio feature extraction typically leads to a strongly reduced audio signal representation. Obtaining such representation can improve the efficiency of audio processing and benefit many applications based on such processing. For example, a compact representation of an audio signal in the form of a fingerprintcan enable extremely fast search for a match between this signal and a large-scale audio database for the purpose of audio signal...

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Recommended Reading

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Author information

Authors and Affiliations

  1. Microsoft Research Asia, Beijing, China

    Lie Lu

  2. Delft University of Technology, Delft, The Netherlands

    Alan Hanjalic

Authors
  1. Lie Lu
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  2. Alan Hanjalic
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Editor information

Editors and Affiliations

  1. College of Computing, Georgia Institute of Technology, 266 Ferst Drive, 30332-0765, Atlanta, GA, USA

    LING LIU (Professor) (Professor)

  2. Database Research Group David R. Cheriton School of Computer Science, University of Waterloo, 200 University Avenue West, N2L 3G1, Waterloo, ON, Canada

    M. TAMER ÖZSU (Professor and Director, University Research Chair) (Professor and Director, University Research Chair)

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© 2009 Springer Science+Business Media, LLC

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Lu, L., Hanjalic, A. (2009). Audio Representation. In: LIU, L., ÖZSU, M.T. (eds) Encyclopedia of Database Systems. Springer, Boston, MA. https://doi.org/10.1007/978-0-387-39940-9_1442

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