Language model score calculating apparatus, learning apparatus, language model score calculating method, learning method and program

Abstract

A language model score calculation apparatus calculates a prediction probability of a word was a language model score of a language model based on a recurrent neural network. The language model score calculation apparatus includes a memory; and a processor configured to execute converting a word wthat is observed immediately before the word winto a word vector ϕ(w); converting a speaker label rcorresponding to the word wand a speaker label rcorresponding to the word winto a speaker vector ψ(r) and a speaker vector ψ(r), respectively; calculating a word history vector sby using the word vector ϕ(w), the speaker vector ψ(r), and a word history vector sthat is obtained when a prediction probability of the word wis calculated; and calculating a prediction probability of the word wby using the word history vector sand the speaker vector ψ(r).