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Browsing by Author "Van Heerden, CJ"

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  • Van Heerden, CJ; De Wet, Febe; Davel, MH (PRASA, 2012-11)
    This paper reports on the automatic alignment of audiobooks in Afrikaans. An existing Afrikaans pronunciation dictionary and corpus of Afrikaans speech data are used to generate baseline acoustic models. The baseline system ...
  • Van Heerden, CJ; De Villiers, P; Barnard, E; Davel, MH (PRASA, 2011-11)
    Initial work towards processing Afrikaans spoken lectures in a resource-scarce environment is presented. Two approaches to acoustic modeling for eventual alignment are compared: (a) using a well-trained target-language ...
  • Van Heerden, CJ; Barnard, E (18th Annual Symposium of the Pattern Recognition Association of South Africa (PRASA), 2007-11)
    The durations of phonemes varies for different speakers. To this end, the correlations between phonemes across different speakers are studied and a novel approach to predict unknown phoneme durations from the values of ...
  • Van Heerden, CJ; Barnard, E (2006-11)
    A novel approach to speech rate normalization is presented. Models are constructed to model the way in which speech rate variation of a specific speaker influences the duration of phonemes. The models are evaluated in two ...
  • Van Heerden, CJ; Barnard, E (PRASA 2010, 2010-11)
    In this article, the authors investigate the relationship between SVM hyperparameters for linear and RBF kernels and classification accuracy. The process of finding SVM hyperparameters usually involves a gridsearch, which ...
  • Van Heerden, CJ; Barnard, E (PRASA, 2005-11)
    This paper presents an analysis of temporal information as a feature for use in speaker verification systems. The relevance of temporal information in a speaker’s utterances is investigated, both with regard to improving ...