WORD ALIGNMENT SCORE COMPUTING APPARATUS, WORD ALIGNMENT APPARATUS, AND COMPUTER PROGRAM

摘要

[Object] An object is to provide an apparatus for attaining highly precise word alignment.;[Solution] The apparatus includes: selecting means receiving a bilingual sentence pair and a word alignment for the bilingual sentence pair, for successively selecting words f_j of a sentence in a first language in a prescribed order; and a recurrent neural network (RNN) 100, computing, for all words of the sentence in the first language, a score 102 representing a probability that a word pair consisting of the word f_j and a word e_{a_{j}} aligned with the word f_j by a word alignment a_j in a second language of the bilingual sentence pair is a correct word pair, and based on this score, for computing a score of the word alignment a_j. When computing a score of word pair (f_j, e_{a_{j}}), RNN 100 computes a score 102 of the word pair (f_j, e_{a_{j}}) based on all word alignments a₁^j-1 selected by the selecting means prior to the word f_j of the word pair (f_j, e_{a_{j}}), of the word alignments a_j, by means of a recurrent connection 118.