Encyclopedia of Database Systems

2018 Edition
| Editors: Ling Liu, M. Tamer Özsu

Audio Representation

  • Lie Lu
  • Alan Hanjalic
Reference work entry
DOI: https://doi.org/10.1007/978-1-4614-8265-9_1442

Synonyms

Audio characterization; Audio feature extraction

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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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Microsoft Research AsiaBeijingChina
  2. 2.Delft University of TechnologyDelftThe Netherlands

Section editors and affiliations

  • Vincent Oria
    • 1
  • Shin'ichi Satoh
    • 2
  1. 1.Dept. of Computer ScienceNew Jersey Inst. of TechnologyNewarkUSA
  2. 2.Digital Content and Media Sciences ReseaMultimedia Information Research DivisionNational Institute of InformaticsTokyoJapan