A voice speed control apparatus comprising: an utterance/non-utterance
judging unit judging whether a processing target segment in inputted a
voice signal is an utterance segment or a non-utterance segment; a
non-utterance continuation length acquiring unit acquiring a
non-utterance continuation length representing a length of the voice
signal judged continuously to be the non-utterance; a determining unit
determining a reproducing speed of the processing target segment in the
voice signal in accordance with the non-utterance continuation length so
that the reproducing speed gets higher as the non-utterance continuation
length gets larger and so that an increase in reproducing speed is
restrained to a greater degree as the non-utterance continuation length
becomes smaller; and a changing unit changing the reproducing speed of
the voice signal, corresponding to the reproducing speed.