Development of indonesian text-to-audiovisual synthesis system using syllable concatenation approach to support indonesian learning

This study aims to develop of Indonesian Text-to-Audiovisual synthesis system using a syllable concatenation approach to support Indonesian learning. This system can visualize the syllable pronunciation synchronized with the speech signal so that it can provide a realistic illustration of the articulator movement when each phoneme is pronounced. Syllable concatenation approach is used to realize a realistic visualization by assembling articulation and coarticulation in the form of syllables. In the development of the system, we have recorded speech database in the syllables form which refers to the patterns of syllables in Indonesian. The syllable concatenation approach is used to concatenate viseme of each phoneme, and to form the visualization of syllable pronunciations. It is synchronized with the corresponding speech from the speech database. Evaluation of this system is conducted based on a "lips-reading" of the 10 Indonesian sentences entered into the system. Ratings are based on the degree of correspondence between the syllable pronunciation and the speech produced. Assessment of all respondents is calculated using MOS (Mean Opinion Score). The calculation results show that the Indonesian text-to-audiovisual system has produced the pronunciation visualization more realistic and smoother.