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Browsing Human language technologies by Title

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  • Tönsing, KM; Van Niekerk, K; Schlunz, Georg I; Wilken, Ilana (Elsevier, 2018-06)
    BACKGROUND: In South Africa, many persons in need of augmentative and alternative communication (AAC) come from multilingual backgrounds. There is as yet a limited evidence base (locally and internationally) for the provision ...
  • Martirosian, O; Davel, M (2008-11)
    Diphthongs typically form an integral part of the phone sets used in English ASR systems. Because diphthongs can be represented using smaller units (that are already part of the vowel system) this representation may be ...
  • Van Niekerk, DR; Barnard, E (PRASA 2008, 2008-11)
    The quality of corpus-based text-to-speech (TTS) systems depends strongly on the consistency of boundary placements during phonetic alignments. Expert human transcribers use visually represented acoustic cues in order to ...
  • Kleynhans, N; Molapo, R; De Wet, Febe (PRASA, 2012-11)
    The paper presents work aimed at optimising acoustic models for the AutoSecretary call routing system. To develop the optimised acoustic models: (1) an appropriate phone set was selected and used to create a pronunciation ...
  • Modipa, T; Davel, M; De Wet, Febe (ACM Digital Library, 2010-10)
    Automatic speech recognition (ASR) systems are increasingly being developed for under-resourced languages, especially for use in multilingual spoken dialogue systems. We investigate different approaches to the acoustic ...
  • Heeringa, W; De Wet, Febe; Van Huyssteen, GB (University of Stellenbosch. Department of General Linguistics, 2015-07)
    Following Den Besten’s (2009) desiderata for historical linguistics of Afrikaans, this article aims to contribute some modern evidence to the debate regarding the founding dialects of Afrikaans. From an applied perspective ...
  • Kleynhans, N; De Wet, Febe (Pattern Recognition Association of South Africa, 2014-11)
    Most of the developing world can still be classified as under-resourced in terms of their languages. Harvesting suitable and relatively easily accessible spoken resources can drastically improve the situation. One such ...
  • 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 ...
  • Schlunz, Georg I; Wilken, Ilana; Moors, Carmen; Gumede, Tebogo; Van der Walt, Willem J; Calteaux, Karen V; Tönsing, K; Van Niekerk, K (ACM Digital Library, 2017-09)
    Persons with certain disabilities face barriers to information access and interpersonal communication. Assistive technologies provide workaround solutions to these problems. Augmentative and alternative communication systems ...
  • Barnard, E; Gouws, E; Wolvaardt, K; Kleynhans, N (PRASA 2004, 2004-11)
    A number of issues realted to the development of speech-recognition systems with Hidden Markov Models (HMM) are discussed. A set of systematic experiments using the HTK toolkit and the TMIT database are used to elucidate ...
  • Sharma Grover, A; Nieman, A; Van Huyssteen, GB; Roux, JC (2012-05)
    The management of language resources requires several legal aspects to be taken into consideration. In this paper we discuss a number of these aspects which lead towards the formation of a legal framework for a language ...
  • 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 ...
  • Modipa, T; De Wet, Febe; Davel, M (PRASA 2009, 2009-11)
    Call routing is an important application of Automatic Speech Recognition (ASR) technology. In this paper the authors discuss the main issues affecting the performance of a call routing system and describe the ASR component ...
  • Bidwell, NJ; Winschiers-Theophilus, H (ACM, 2012-10)
    There are mismatches between indigenous knowledge (IK) and the media, representations and abstractions used to gather and depict IK in an increasing number of projects in Africa. We describe new studies that continue our ...
  • Butgereit, L; Botha, RA (IIMC International Information Management Corporation, 2012-05)
    Dr Math is a mobile, online tutoring project which allows primary and secondary school pupils to contact tutors in mathematics using text based chat systems on their cell phones. The tutors use traditional Internet based ...
  • 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 ...
  • Barnard, E; Davel, M (2006-11)
    The phonetic segmentation of recorded speech is a crucial factor in the quality of concatenative systems for speech synthesis. The authors describe a likelihood-based error detection process that can be used to flag possible ...
  • Mokgonyane, TB; Sefara, Tshephisho J; Modipa, Thipe I; Mogale, MM; Manamela, MJ; Manamela, PJ (IEEE, 2019-01)
    Speaker recognition is a technique used to automatically recognize a speaker from a recording of their voice or speech utterance. Speaker recognition technology has improved over recent years and has become inexpensive and ...
  • Mokgonyane, TB; Sefara, Tshephisho J; Modipa, TI; Manamela, MJ (IEEE, 2019-09)
    Speaker recognition is a technique that automatically identifies a speaker from a recording of their voice. Speaker recognition technologies are taking a new trend due to the progress in artificial intelligence and machine ...
  • Louw, Johannes A; Moodley, Avashlin (IEEE, 2017-12)
    In this paper an automatic method to implicitly model intonation for statistical parametric speech synthesis (SPSS) is presented. The approach is ideally suited to single speaker speech databases as used in text-to-speech ...

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