| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a morpheme string conversion apparatus which converts a certain morpheme string into a morpheme string of a different part-of-speech scheme without using two morpheme analysis systems of different morpheme schemes. <P>SOLUTION: A morpheme string conversion apparatus includes a phrase table, an unknown word table, a parameter table, a lattice structure construction unit, a maximum likelihood phrase couple string search unit and an output morpheme string creation unit. The lattice structure construction unit refers to the phrase table and the unknown word table for a conversion source morpheme string, acquires a phrase couple corresponding to an input morpheme string and constructs a phrase lattice structure. The maximum likelihood phrase couple string search unit refers to the parameter table to search for a maximum likelihood phrase couple string of a phrase lattice. The output morpheme string creation unit then extracts and outputs a conversion destination morpheme from the maximum likelihood phrase couple string, thereby converting the conversion source morpheme string into the conversion destination morpheme string without using a morpheme analyzer. <P>COPYRIGHT: (C)2012,JPO&INPIT |
