STORAGE MEDIUM RECORDED WITH TREE STRUCTURE DICTIONARY, TREE STRUCTURE DICTIONARY CREATION DEVICE, AND TREE STRUCTURE DICTIONARY CREATION PROGRAM

摘要

PROBLEM TO BE SOLVED: To provide a storage medium, in which a tree structure dictionary is recorded, which is used for recognizing unknown words with certain confidence without changing a language model in large vocabulary continuous speech recognition, and to provide a tree structure dictionary creation device, and a tree structure dictionary creation program.

SOLUTION: A speech recognition device 140 includes: a word dictionary 150 for storing a tree structure dictionary for known words provided beforehand; a language model 152 for storing uni-gram probability and bi-gram probability of known words; the tree structure dictionary 156 including unknown words for storing the tree structure dictionary for unknown words for each class; and an unknown word dictionary management section 160 for managing the tree structure dictionary 156, by creating the tree structure dictionary 156 including unknown words, and adding new unknown words to the tree structure dictionary 156 including unknown words, by using the word dictionary 150 and the language model 152.

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