Language model learning system, speech recognition system, language model learning method, and program

摘要

PPROBLEM TO BE SOLVED: To give good scores to a word string characteristic of a corpus before mixture when a plurality of corpora are mixed to learn a language model. PSOLUTION: A necessary word selection part 103 selects a necessary word from a corpus-A holding part 101 and a word ID imparting part 105 imparts a word ID characteristic of a corpus A thereto and saves them in a mixed corpus holding part 107. A corpus-B holding part 102, a necessary word selection part 104, and a word ID imparting part 106 also similarly operate. A class-ID imparting part 108 imparts a class ID to words saved in the mixed corpus holding part 107. A language model learning part 109 estimates a language model from the contents of the mixed corpus holding part 107 and stores it in a word language model holding part 110, a class language model holding part 111, and a smoothing information holding part 112. PCOPYRIGHT: (C)2005,JPO&NCIPI