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A Method for Isolated Thai Tone Recognition Using a Combination of Neural Networks
Author(s) -
Thubthong Nuttakorn,
Kijsirikul Boonserm,
Pusittrakul Apirath
Publication year - 2002
Publication title -
computational intelligence
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.353
H-Index - 52
eISSN - 1467-8640
pISSN - 0824-7935
DOI - 10.1111/0824-7935.00193
Subject(s) - speech recognition , tone (literature) , computer science , artificial neural network , pattern recognition (psychology) , feedforward neural network , artificial intelligence , art , literature
Tone information is very important to speech recognition in a tonal language such as Thai. In this article, we present a method for isolated Thai tone recognition. First, we define three sets of tone features to capture the characteristics of Thai tones and employ a feedforward neural network to classify tones based on these features. Next, we describe several experiments using the proposed features. The experiments are designed to study the effect of initial consonants, vowels, and final consonants on tone recognition. We find that there are some correlations between tones and other phonemes, and the recognition performances are satisfying. A human perception test is then conducted to judge the recognition rate. The recognition rate of a human is much lower than that of a machine. Finally, we explore various combination schemes to enhance the recognition rate. Further improvements are found in most experiments.