An active learning method using clustering and committee-based sample selection for sound event classification

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    1 Citation (Scopus)
    28 Downloads (Pure)

    Abstract

    This paper proposes an active learning method to control a labeling process for efficient annotation of acoustic training material, which is used for training sound event classifiers. The proposed method performs K-medoids clustering over an initially unlabeled dataset, and medoids as local representatives, are presented to an annotator for manual annotation. The annotated label on a medoid propagates to other samples in its cluster for label prediction. After annotating the medoids, the annotation continues to the unexamined sounds with mismatched prediction results from two classifiers, a nearest-neighbor classifier and a model-based classifier, both trained with annotated data. The annotation on the segments with mismatched predictions are ordered by the distance to the nearest annotated sample, farthest first. The evaluation is made on a public environmental sound dataset. The labels obtained through a labeling process controlled by the proposed method are used to train a classifier, using supervised learning. Only 20% of the data needs to be manually annotated with the proposed method, to achieve the accuracy with all the data annotated. In addition, the proposed method clearly outperforms other active learning algorithms proposed for sound event classification through all the experiments, simulating varying fraction of data that is manually labeled.

    Original languageEnglish
    Title of host publication16th International Workshop on Acoustic Signal Enhancement, IWAENC 2018
    PublisherIEEE
    Pages116-120
    Number of pages5
    ISBN (Electronic)9781538681510
    DOIs
    Publication statusPublished - 2 Nov 2018
    Publication typeA4 Article in a conference publication
    EventInternational Workshop on Acoustic Signal Enhancement - Tokyo, Japan
    Duration: 17 Sep 201820 Sep 2018

    Conference

    ConferenceInternational Workshop on Acoustic Signal Enhancement
    Country/TerritoryJapan
    CityTokyo
    Period17/09/1820/09/18

    Keywords

    • Active learning
    • Committee-based sample selection
    • K-medoids clustering
    • Sound event classification

    Publication forum classification

    • Publication forum level 1

    ASJC Scopus subject areas

    • Signal Processing
    • Acoustics and Ultrasonics

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