Second European Conference on Speech Communication and Technology

Genova, Italy
September 24-26, 1991


A PC-Housed Speaker Independent Large Vocabulary Continuous Telephonic Speech Recognizer

A. Ciaramella, D. Clementino, R. Pacifici

CSELT - Centro Studi e Laboratori Telecomunicazioni, Torino, Italy

We implemented a PC housed continuous speech acoustical front-end (AFE) for a vocabulary of a thousand words, incorporated into an overall man-machine dialogue system for data base access using telephonic speech. The AFE can be instructed to perform both isolated word and continuous speech recognition; in the latter case the recognition is done in two stages, the first being an evaluation of a lattice of words and of the best scored word sequence, and the second a verification of the most acoustically likely sentences chosen from amongst those which are syntactically and semantically correct. For real-time interactive behaviour, the PC is equipped with 1 DSP board for features extraction and 3 DSP boards with the corresponding memory extension for recognition. Appropriate task synchronization and partition between these boards and the PC program provide real-time performance and a satisfactory degree of accuracy.

Full Paper

Bibliographic reference.  Ciaramella, A. / Clementino, D. / Pacifici, R. (1991): "A PC-housed speaker independent large vocabulary continuous telephonic speech recognizer", In EUROSPEECH-1991, 1341-1344.