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Browsing by Author "Davel, MH"

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  • Badenhorst, J; Davel, MH; Barnard, E (PRASA 2010, 2010-11)
    The authors investigate several approaches aimed at a more detailed understanding of co-articulation in spoken utterances. They find that the Euclidean difference between instantaneous frame-based feature values and the ...
  • 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 ...
  • Davel, MH; Barnard, E (PRASA, 2003-11)
    This paper describes a method for improving the efficiency of the language resource development process through bootstrapping.
  • Davel, MH; Barnard, E (Interspecch 2005, 2005-09)
    Bootstrapping techniques are an efficient way to develop electronic pronunciation dictionaries, but require fast system response to be practical for medium-to-large lexicons. In addition, user errors are inevitable during ...
  • Basson, WD; Davel, MH (PRASA 2012, 2012-11)
    This paper compares the recognition accuracy of a phoneme-based automatic speech recognition system with that of a grapheme-based system, using Afrikaans as case study. The first system is developed using a conventional ...
  • Kgampe, M; Davel, MH (PRASA 2010, 2010-11)
    The authors investigate the consistency with which speakers with different language profiles are able to pronounce personal names from Afrikaans, English, Setswana and isiZulu. They gather data in a controlled research ...
  • Modipa, TI; Davel, MH; De Wet, Febe (PRASA, 2012-11)
    When modelling code-switched speech (utterances that contain a mixture of languages), the embedded language often contains phones not found in the matrix language. These are typically dealt with by either extending the ...
  • Davel, MH; Barnard, E (PRASA 2004, 2004-11)
    The authors define a novel g-to-p prediction algorithm that utilises the concept of a 'default phoneme': a grapheme which is realised as a specific phoneme significantly more often than as any other phoneme. They found ...
  • Peché, M; Davel, MH; Barnard, E (South African Institute of Electrical Engineers (SAIEE), 2009-12)
    This article introduces the first Spoken Language Identification system developed to distinguish among all eleven of South Africa’s official languages. The PPR-LM (Parallel Phoneme Recognition followed by Language Modeling) ...
  • Badenhorst, JAC; Davel, MH (2007-11)
    The authors analyse the effect of speech rate variation on Afrikaans phone stability from an acoustic perspective. Specifically they introduce two techniques for the acoustic analysis of speech rate variation, apply these ...
  • Davel, MH; Barnard, E (2004-10)
    Bootstrapping techniques have significant potential for the efficient generation of linguistic resources such as electronic pronunciation dictionaries. The authors describe a system and an approach to bootstrapping for the ...
  • Davel, MH; Barnard, E (2004-10)
    The authors focus on factors related to the underlying rule-extraction algorithms, and demonstrate variants of the Dynamically Expanding Context algorithm, which are beneficial for this application. They show that continuous ...
  • Davel, MH; Van Heerden, C; Kleynhans, N; Barnard, E (The International Speech Communication Association, 2011-08)
    Spoken recordings that have been transcribed for human reading (e.g. as captions for audiovisual material, or to provide alternative modes of access to recordings) are widely available in many languages. Such recordings ...
  • Joubert, LJ; Davel, MH; Barnard, E; Zimu, V (PRASA, 2004-11)
    The need for a bootstrapping approach to the morphological decomposition of words in agglutinative languages such as isiZulu is motivated, and the complexities of such an approach are described. The authors then introduce ...
  • Govender, N; Barnard, E; Davel, MH (Interspeech 2005, 2005-09)
    Much theoretical work has been done on the tonal structure of languages in the Bantu family. However, most of these studies are not supported by physical measurements, or even a consistent model for mapping from linguistic ...
  • Modipa, TI; Davel, MH; De Wet, Febe (PRASA 2013 Proceedings, 2013-12)
    Code switching (the process of switching from one language to another during a conversation) is a common phenomenon in multilingual environments. Where a minority and dominant language coincide, code switching from the ...
  • Badenhorst, J; Davel, MH; Barnard, E (PRASA, 2012-11)
    We improve on a piece-wise linear model of the trajectories of Mel Frequency Cepstral Coefficients, which are commonly used as features in Automatic Speech Recognition. For this purpose, we have created a very clean ...
  • Van Huyssteen, GB; Davel, MH (Association for Computational Linguistics, 2010-06)
    In this research, the authors use machine learning techniques to provide solutions for descriptive linguists in the domain of language standardization. With regard to the personal name construction in Afrikaans, the authors ...
  • Barnard, E; Davel, MH; Van Heerden, C; De Wet, Febe; Badenhorst, J (2014-05)
    The NCHLT speech corpus contains wide-band speech from approximately 200 speakers per language, in each of the eleven of cial languages of South Africa. We describe the design and development processes that were undertaken ...
  • Peche, M; Davel, MH; Barnard, E (2007-08)
    The authors investigate the addition of a new language, for which limited resources are available, to a phonotactic language identification system. Two classes of approaches are studied: in the first class, only existing ...