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Browsing by Author "Van Heerden, C"

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  • Barnard, E; Davel, M; Van Heerden, C (ISCA, 2009-09)
    The authors investigate the number of speakers and the amount of data that is required for the development of useable speaker-independent speech-recognition systems in resource-scarce languages. Their experiments employ ...
  • Van Heerden, C; Barnard, E; Davel, M (International Speech Communication Association, 2009-09)
    Spoken dialogue systems (SDSs) have great potential for information access in the developing world. However, the realisation of that potential requires the solution of several challenging problems, including the development ...
  • Kleynhans, N; Hartman, W; Van Niekerk, D; Van Heerden, C; Schwartz, R; Tsakalidis, S; Davel, M (Elsevier, online, 2016-05)
    We investigate modeling strategies for English code-switched words as found in a Swahili spoken term detection system. Code switching, where speakers switch language in a conversation, occurs frequently in multilingual ...
  • Badenhorst, J; Van Heerden, C; Davel, M; Barnard, E (Springer Science+Business Media B.V., 2011-08)
    The authors describe the Lwazi corpus for automatic speech recognition (ASR), a new telephone speech corpus which contains data from the eleven official languages of South Africa. Because of practical constraints, the ...
  • Badenhorst, JAC; Van Heerden, C; Davel, M; Barnard, E (Association for Computational Linguistics, 2009-03)
    The authors describes the Lwazi corpus for automatic speech recognition (ASR), a new telephone speech corpus which includes data from nine Southern Bantu languages. Because of practical constraints, the amount of speech ...
  • Van Heerden, C; Barnard, E (PRASA 2009, 2009-11)
    The authors compare several different classifier combination methods on a single task, namely speaker age classification. This task is well suited to combination strategies, since significantly different feature classes ...
  • 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 ...
  • Van Heerden, C; Schalkwyk, J; Strope, B (International Speech Communication Association, 2009-09)
    This paper describes the language modelling (LM) architectures and recognition experiments that enabled support of 'what-with-where' queries on GOOG-411. First the paper compares accuracy trade-offs between a single national ...
  • Barnard, E; Van der Walt, Christiaan M; Davel, M; Van Heerden, C; Senekal, FP; Naidoo, T (PRASA, 2009-11)
    Bayesian networks have shown themselves to be useful tools for the analysis and modelling of large data sets. However, their complete generality leads to computational and modelling complexities that have limited their ...
  • Calteaux, K; De Wet, Febe; Moors, C; Van Niekerk, D; McAlister, B; Grover, AS; Reid, T; Davel, M; Barnard, E; Van Heerden, C (CSIR, 2013-02)
    From 2010-2012 the Human Language Technology (HLT) research group of the CSIR Meraka Institute received funding from the Department of Arts and Culture (DAC) for a project entitled Lwazi II: Increasing the impact of speech ...
  • Feld, M; Barnard, E; Van Heerden, C; Muller, C (IEEE, 2009-12)
    Multilinguality represents an area of significant opportunities for automatic speech-processing systems: whereas multilingual societies are commonplace, the majority of speechprocessing systems are developed with a single ...
  • 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 ...
  • Van Heerden, C; Kleynhans, N; Barnard, E; Davel, M (School of Computer Sciences, Universiti Sains Malaysia, 2010-05)
    We describe several experiments that were conducted to assess the viability of data pooling as a means to improve speech-recognition performance for under-resourced languages. Two groups of closely related languages from ...
  • Horak, E; Verhaeghe, Benoit MJA; Rust, FC; Van Heerden, C (1994-10)
    Roads with high traffic volumes are synonymous with high road related noise levels. In Johannesburg road related noise pollution is recognised as a negative environmental impact. The Noise Pollution Unit of Johannesburg ...
  • Barnard, E; Schalkwyk, J; Van Heerden, C; Moreno, PJ (International Speech Communication Association (ISCA), 2010-09)
    In light of the serious problems with both illiteracy and information access in the developing world, there is a widespread belief that speech technology can play a significant role in improving the quality of life of ...