WRONG SENTENCE CORRECTION DEVICE, WRONG SENTENCE CORRECTION METHOD AND PROGRAM

摘要

PROBLEM TO BE SOLVED: To provide a wrong sentence correction device, a wrong sentence correction method and a program which can correct word string data obtained by a morphological analysis with high accuracy.SOLUTION: A morphological analysis processing unit 12 acquires word string data from a sentence to be corrected by a morphological analysis. A correction candidate derivation processing unit 14 derives a first correction candidate which is a correction candidate corresponding to a predetermined grammatical rule for a word in the acquired word string data, and also derives a word whose description is close to a character string retrieved from the word dictionary as a second correction candidate for a word which is absent in the word dictionary. A word lattice generation processing unit 16 generates a word lattice by using the first correction candidate and the second correction candidate which are derived. A maximum likelihood word string retrieval processing unit 18 generates a corrected sentence for the sentence to be corrected by retrieving the word string to be maximum likelihood for the generated word lattice.