Replicate mismatch between test/background and development databases: The impact on the performance of likelihood ratio-based forensic voice comparison

    Research output: Contribution to conferencePaper

    Abstract

    In this paper, we report on a study which demonstrates that the mismatch in within-speaker replicate numbers (the number of tokens used to model each sample) between test/background and development databases has a large impact on the performance of a forensic voice comparison (FVC) system. We describe how and to what extent the different degrees of the mismatch influence the performance of the FVC system. The performance of an FVC system based on temporal MFCC features and the Multivariate Kernel Density Likelihood Ratio procedure is tested in terms of its validity and reliability under the mismatched conditions. The Monte Carlo technique is employed to repeatedly carry out FVC tests. We report that the databases matched with respect to replicate numbers result in optimal performance in terms of validity, but not in terms of reliability.
    Original languageEnglish
    Pages393-397
    Publication statusPublished - 2014
    EventAnnual Conference of the International Speech Communication Association INTERSPEECH 2014 - Singapore
    Duration: 1 Jan 2014 → …

    Conference

    ConferenceAnnual Conference of the International Speech Communication Association INTERSPEECH 2014
    Period1/01/14 → …

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