SPEECH RECOGNITION DEVICE AND PROGRAM

摘要

PROBLEM TO BE SOLVED: To reliably recognize a necessary irreducible vocabulary such as a keyword. SOLUTION: In a language model stored in a language model database, a 1st word group class having order restrictions on word order and a 2nd word group class having probabilistic restrictions on word order are composed of network models. That is, the language model has a connection of important words (e.g. a keywords needed to control equipment) described by using network grammar, and an unimportant word which is interposed between them is described with a probabilistic grammar model (statistical language model). A speech recognition part performs speech recognition by using the language model to perform the speech recognition with high precision at least as to the keyword. COPYRIGHT: (C)2005,JPO&NCIPI