On Phonemes As Cognitive Components of Speech

Ling Feng, Lars Kai Hansen

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    Abstract

    COgnitive Component Analysis (COCA) defined as the process of unsupervised grouping of data such that the ensuing group structure is well-aligned with that resulting from human cognitive activity, has been explored on phoneme data. Statistical regularities have been revealed at multiple time scales. The basic features are 25-dimensional short time (20ms) melfrequency weighted cepstral coefficients. Features are integrated by means of stacking to obtain features at longer time scales. Energy based sparsification is carried out to achieve sparse representations. Our hypothesis is ecological: we assume that features that essentially independent in a context defined ensemble can be efficiently coded using a sparse independent component representation. This means that supervised and unsupervised learning should result in similar representations. We indeed find that supervised and unsupervised learning seem to identify similar representations, here, measured by the classification similarity.
    Original languageEnglish
    Title of host publicationThe 1st IAPR Workshop on Cognitive Information Processing
    Publication date2008
    Publication statusPublished - 2008
    EventThe 1st IAPR Workshop on Cognitive Information Processing - Santorini, Greece
    Duration: 1 Jan 2008 → …

    Conference

    ConferenceThe 1st IAPR Workshop on Cognitive Information Processing
    CitySantorini, Greece
    Period01/01/2008 → …

    Keywords

    • Unsupervised Learning
    • Cognitive Component Analysis
    • Phoneme Classification
    • Supervised Learning

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