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- Title
Improving a tone labeling algorithm for Sesotho.
- Authors
Raborife, Mpho; Ewert, Sigrid; Zerbian, Sabine
- Abstract
We report on a study that aimed to improve an existing tone label prediction algorithm for Sesotho, an official language of South Africa. Tone is an important prosodic feature of Sesotho, since speakers use tone to distinguish meaning. In order to implement tone in a Text-to-Speech system for Sesotho, a tone modeling algorithm must receive as input the tone labels of the syllables of each word. Then it can predict the appropriate intonation of the word. Since Sesotho does not mark tone labels in orthography, the labels have to be predicted according to the tonal rules of the language. The existing tone label prediction algorithm has two drawbacks, namely it implements three tonal rules only and is restricted to the clitic phrase domain. In our study, we developed an algorithm that implements four additional tonal rules and addresses all parts of speech. The results show that the latter algorithm significantly improves the existing one by increasing the number of matched tone labels.
- Subjects
SOUTH Africa; SOTHO language; LINGUISTICS; SPEECH processing systems; ORTHOGRAPHY &; spelling; COMPUTER science
- Publication
Language Resources & Evaluation, 2015, Vol 49, Issue 1, p19
- ISSN
1574-020X
- Publication type
Article
- DOI
10.1007/s10579-014-9281-4