PROBLEM TO BE SOLVED: To provide a speech speed conversion device, a speaking device and a speech speed conversion method, capable of automatically converting speech speed of only speech of a speaker specified by a student, with a conversion rate by which a user feels most desirable.;SOLUTION: The speech speed conversion device is provided with: a speech feature extraction section 101 for extracting a speech feature of the individual speaker who attends speaking; a speech feature storage section 102 for storing the speech feature for the speaker specified by the student; a speaker determination section 103 for determining whether or not an uttering person is one of the speaker specified by the student by comparing the speech feature of a current speaker with the speech feature stored by the speech feature storage section 102; and a speech speed conversion section 104 for converting the speech speed of received speech of the speaker, when it is determined that the uttering person is the speaker specified by the student by the speaker determination section 103.;COPYRIGHT: (C)2009,JPO&INPIT
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