Patent ID: 8626510

Claim:
A speech synthesizing device comprising: an acquiring unit configured to acquire a plurality of pattern sentences, which are semantically equivalent to one another and each include a fixed segment and a non-fixed segment, and a substitution word, the fixed segment is not to be replaced with any other word, the non-fixed segment is to be replaced with another word, the substitution word is substituted for the non-fixed segment; a sentence generating unit configured to generate a plurality of target sentences by replacing the non-fixed segment with the substitution word for each of the pattern sentences; a first synthetic-sound generating unit configured to generate a first synthetic sound, which is a synthetic sound of the fixed segment, for each of the target sentences; a second synthetic-sound generating unit configured to generate a second synthetic sound, which is a synthetic sound of the substitution word, for each of the target sentences; a calculating unit configured to calculate a discontinuity value of a boundary between the first synthetic sound and the second synthetic sound, for each of the target sentences; a selecting unit configured to select one of the target sentences having the smallest discontinuity value from the target sentences; and a connecting unit configured to connect the first synthetic sound and the second synthetic sound of the target sentence selected.