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Browsing by Author "Barnard, E"

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  • Van Dyk, E; Barnard, E (18th Annual Symposium of the Pattern Recognition Association of South Africa (PRASA), 2007-11)
    The authors investigate the use of naive Bayesian classifiers for multinomial feature spaces and derive error estimates for these classifiers. The error analysis is done by developing a mathematical model to estimate the ...
  • 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 ...
  • Molapo, R; Barnard, E (Pattern Recognition Association of South Africa, 2014-11)
    The purpose of this paper is to address the challenges and describe step-by-step solutions faced when developing an automatic speech recognition system in multilingual societies. We give a brief statistical analysis of the ...
  • Davel, M; Barnard, E (PRASA, 2005-11)
    In this paper the authors describe a new approach to rewrite rule extraction and analysis, using Minimal Representation Graphs. This approach provides a mechanism for obtaining the smallest possible rule set – within a ...
  • Ndwe, J; Barnard, E; Dlodlo, M; Mashao, D; Kuun, C; Sharma, A (Springer, 2008-09)
    The OpenPhone project aims to design an Interactive Voice Response (IVR) health information system that enables people who are caregivers for HIV/AIDS infected children to access relevant information by using a telephone ...
  • Barnard, E; Cho, Moses A; Debba, Pravesh; Mathieu, Renaud SA; Wessels, Konrad J; van Heerden, C; Van der Walt, Christiaan M; Asner, GP (PRASA 2010, 2010-11)
    The authors investigate the classification of eight prominent savanna tree species, based on hyperspectral reflectance data. Although two principal components account for 95% of the variance of the data, up to 20 components ...
  • Zulu, PN; Botha, G; Barnard, E (CSIR, 2007)
    Two methods for objectively measuring similarities and dissimilarities between the 11 official languages of South Africa are described. The first concerns the use of n-grams. The confusions between different languages in ...
  • Schlunz, GI; Barnard, E; Van Huyssteen, GB (PRASA 2010, 2010-11)
    One of the goals of text-to-speech (TTS) systems is to produce natural-sounding synthesised speech. Towards this end various natural language processing (NLP) tasks are performed to model the prosodic aspects of the TTS ...
  • Coetzee, L; Barnard, E (PRASA 2004, 2004-11)
    This paper analyses a number of disabilities, their assistive devices and the associated technologies in order to highlight the role pattern recognition plays in enabling accessibility and improving human computer interaction ...
  • Van Niekerk, DR; Barnard, E; Schlunz, G (PRASA 2009, 2009-11)
    With the increasing prominence and maturity of corpus-based techniques for speech synthesis, the process of system development has in some ways been simplified considerably. However, the dependence on sufficient amounts ...
  • Van Niekerk, DR; Barnard, E (International Speech Communication Association (ISCA), 2009-09)
    The rapid development of concatenative speech synthesis systems in resource scarce languages requires an efficient and accurate solution with regard to automated phonetic alignment. However, in this context corpora are ...
  • Zerbian, S; Barnard, E (NISC, 2008)
    Much is already known about the prosodic systems of the indigenous South African languages from descriptions and analyses in the existing literature. All of the existing work has been carried out in the field of African ...
  • 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 ...
  • Govender, N; Barnard, E; Davel, MH (Sabinet Online, 2007-06)
    Although the complexity of prosody is widely recognised, the lack of widely-accepted descriptive standards for prosodic phenomena has meant that prosodic systems for most of the languages of the world have, at best, been ...
  • 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 ...
  • Peche, M; Davel, M; Barnard, E (2008-11)
    A speech processing system is often required to perform in a different environment than the one for which it was initially developed. In such a case, data from the new environment may be more limited in quantity and of ...
  • Van Niekerk, DR; Barnard, E (Elsevier, 2013)
    Pitch is a fundamental acoustic feature of speech and as such needs to be determined during the process of speech synthesis. While a range of communicative functions are attributed to pitch variation in speech of all ...
  • 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 ...
  • De Vries, NJ; Davel, MH; Badenhorst, J; Basson, WD; De Wet, Febe; Barnard, E; De Waal, A (Elsevier, 2014-01)
    Acoustic data collection for automatic speech recognition (ASR) purposes is a particularly challenging task when working with under resourced languages, many of which are found in the developing world. We provide a brief ...
  • 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 ...