Final Consonant Segmentation for Thai syllable by Using Vowel Characteristics and Wavelet Packet Transform
| Paper File | Download Paper File | | Appear In | ECTI Transaction CIT (ECTI Transaction CIT) | | Publication Date | 01/05/2005 - 31/05/2005 | | Volume | 1 | | Pages | 50 - 62 | | No | 1 | | Author 1 | Kosin Chamnongthai | | Author 2 | Wudthipong Pichitwong | | Author 3 | Piyasawat Navaratana Na Ayudhya |
Abstract
Since Thai final consonant is unique comparing
with other languages and plays key role in recognizing
the Thai syllables, segmentation of the final consonant
phoneme from the vowel is needed and capable
of decreasing the amount of recognition patterns and
also improving the recognition accuracy. This paper
presents a technique to separate the final consonant
phoneme from Thai syllable by exploiting the vowel
characteristics and Wavelet packet transform. In this
method, ending of the vowel phoneme (starting of the
final consonant) is considered by vowel characteristic,
which has the highest energy in the syllable. The frequency
range having this qualification is selected as
vowels. It is then employed to determine the filter for
vowel signal. The Wavelet packet transform that is
appropriate for discriminating vowel (high frequency
and long period) from final consonant phoneme (low
frequency and short period) is used as the filter. And
the ending of vowels frequency signal component is
considered to be the segmentation point of the final
consonant. The experiments have been performed by
4,350 samples of syllable recorded from 15 males and
15 females. The experimental results gained the 92.89
% accuracy. |
