Finite State Grammar Representations of a Military Communications Task for Use in Automatic Speech Recognition

Presenter Information

Ivan Marte, Minnesota State University, Mankato
Tung Pham, Minnesota State University, MankatoFollow
Alex Thom, Minnesota State University, Mankato

Location

CSU 253

Start Date

25-4-2006 10:30 AM

End Date

25-4-2006 11:30 AM

Student's Major

Computer Information Science

Student's College

Science, Engineering and Technology

Mentor's Name

Colin Wightman

Mentor's Department

Computer Information Science

Mentor's College

Science, Engineering and Technology

Second Mentor's Name

Rebecca Bates

Second Mentor's Department

Computer Information Science

Second Mentor's College

Science, Engineering and Technology

Description

Recognizing speech in noisy environments is a difficult task. One way to simplify the solution is to work on a problem with constrained vocabulary and grammatical structure. This task involves a military command center interacting with ships. All speakers use a predetermined form for their utterances. A typical utterance in this task could be "Nine Two. This is Six Nine. Long Message. Over." followed by "This is Nine Two. Send. Over." This project involves constructing finite state grammar representations of this speech to be combined with acoustic models for automatic speech recognition. Training and testing are done with data generated using the unclassified military document ACP 125(F), "Communication Instructions Radiotelephone Procedure". This work involves identifying the overall grammatical structure and sub-grammars that can be used to specify repeated structures. The forms of some sub-grammars used will be presented.