Sethos: the UPC speech understanding system

Author

Bonafonte, Antonio ; Marino, José B. ; Nogueiras, A.

Author_Institution

Univ. Politecnica de Catalunya, Barcelona, Spain

Volume

4

fYear

1996

fDate

3-6 Oct 1996

Firstpage

2151

Abstract

In EuroSpeech´95, the authors presented the first version of Sethos, the speech understanding system which has been developed at the UPC. In this paper some improvements are incorporated at different levels of Sethos: language model, models of the semantic units and acoustic models. These improvements increase the percentage of correctly decoded sentences from 60% to 80%. Some experiments are presented to evaluate the influence of each information source on the final performance. Furthermore, the computational cost is analyzed arriving to an important conclusion: the configuration which gives the best performance is also the less expensive. The reason is that as better is the modeling, narrower is the beam of the search

Keywords

computational complexity; speech recognition; Sethos; UPC speech understanding system; acoustic models; computational cost; correctly decoded sentence; information source; language model; semantic unit models; Acoustic beams; Computational efficiency; Databases; Decoding; Feeds; Natural language processing; Natural languages; Performance analysis; Speech processing; Speech recognition;

fLanguage

English

Publisher

ieee

Conference_Titel

Spoken Language, 1996. ICSLP 96. Proceedings., Fourth International Conference on

Conference_Location

Philadelphia, PA

Print_ISBN

0-7803-3555-4

Type

conf

DOI

10.1109/ICSLP.1996.607229

Filename

607229