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Encyclopedia of Database Systems pp 192–198Cite as

Audio Classification

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Synonyms

Audio categorization; Audio indexing; Audio recognition

Definition

Audio classification aims at classifying a piece of audio signal into one of the pre-defined semantic classes. It is typically realized as a combination of a learning step to learn a statistical model of each semantic class, and an inference step to estimate which semantic class is closest to the given piece of audio signal.

Historical Background

Audio classification associates semantic labels with audio signals, and can also be referred to as audio indexing, audio categorization or audio recognition. As such, audio classification plays an important role in facilitating search and retrieval in large-scale audio collections (databases). Semantic labels are used to represent semantic classes or semantic concepts, which can be defined at different abstraction and complexity levels. Typical examples of basic semantic audio classes are speech, music, environmental sounds, and silence, which can be detected rather...

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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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Corresponding author

Correspondence to Lie Lu .

Editor information

Editors and Affiliations

  1. Georgia Institute of Technology College of Computing, Atlanta, GA, USA

    Ling Liu

  2. University of Waterloo School of Computer Science, Waterloo, ON, Canada

    M. Tamer Özsu

Section Editor information

  1. Dept. of Computer Science, New Jersey Inst. of Technology, Newark, NJ, USA

    Vincent Oria

  2. Digital Content and Media Sciences ReseaMultimedia Information Research Division, National Institute of Informatics, Tokyo, Japan

    Shin'ichi Satoh

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Lu, L., Hanjalic, A. (2018). Audio Classification. In: Liu, L., Özsu, M.T. (eds) Encyclopedia of Database Systems. Springer, New York, NY. https://doi.org/10.1007/978-1-4614-8265-9_1032

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