A Trial Of Japanese Text Input System Using Speech Recognition

Since written Japanese texts are expressed by many kinds of characters, input technique is most difficult when Japanese information is processed by computers. Therefore a task-independent Japanese text input system which has a speech analyzer as a main input device and a keyboard as an auxiliary device was designed and it has been implemented. The outline and experience of this system is described in this paper. The system consists of the phoneme discrimination part and the word discrimination part. Acoustic analysis and phonemic discrimination are effectively performed using an estimation method of the articulatory motion from speech waves in the phoneme discrimination part. And its outputs are lattices of Japanese pseudo-phonemes corresponding to speech inputs. In the word discrimination part, phonemic strings are corrected using various kinds of a priori knowledge anu transformed into suitable kinds of characters. On behalf of it, this part mainly consists of the refrieval of the word dictionary indexed by vowels, and the similarity calculation using dynamic programming.