Tone labelling algorithm for Sesotho

Show simple item record Raborife, Mpho 2012-02-06T07:23:11Z 2012-02-06T07:23:11Z 2012-02-06
dc.description M.Sc., Faculty of Science, University of the Witwatersrand, 2011 en_US
dc.description.abstract Studies have shown that text-to-speech systems need detailed prosodic models of a language in order to ideally sound natural to native speakers of the language. A text-to-speech system developed for Sesotho needs to have tone implemented in it since Sesotho is a tonal language which uses pitch variations to distinguish lexical and/or grammatical meaning. In order to implement tone for a language such as Sesotho, it is necessary for a tone modeling algorithm to receive as input the tone labels of the syllables of a word. This allows the algorithm to predict the appropriate intonation of the word. The aim of our study is to improve a basic tone labeling algorithm that predicts tone labels using three Sesotho tonal rules. The application of this algorithm is restricted to polysyllabic verb stems. The research study involves implementing an extended tone labeling algorithm that implements four additional Sesotho tonal rules and extends its application to all the other parts of speech. The results of our study show that the extended tone labeling algorithm significantly improves the basic algorithm by increasing the number of matched tone labels. Furthermore, our study provides the basic step to tone modeling for languages such as Sesotho which do not mark tone labels in orthography. en_US
dc.language.iso en en_US
dc.subject Computer software en_US
dc.subject Information theory en_US
dc.subject Signal processing en_US
dc.subject Algorithms en_US
dc.subject Sound (recording and reproducing) en_US
dc.title Tone labelling algorithm for Sesotho en_US
dc.type Thesis en_US

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