Speech speed conversion factor determining device, speech speed conversion device, program, and storage medium
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United States of America Patent
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Sep 8, 2015
Grant Date -
Dec 5, 2013
app pub date -
Jan 27, 2012
filing date -
Jan 28, 2011
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Abstract
A speech speed conversion factor determining device has a physical index calculation unit including a sound/silence judgment unit that distinguishes between sound and silent intervals of an input signal, a fundamental frequency calculation unit that calculates a fundamental frequency of the signal in the sound intervals and determines stable and unstable intervals, a frequency smoothing unit that smoothes the fundamental frequency in the stable intervals, a pseudo fundamental frequency calculation unit that calculates, for the intervals, a pseudo fundamental frequency by interpolation , and a fundamental frequency general shape connection unit that connects the smoothed and pseudo frequencies to obtain sampled values of a general shape of the frequency, such that the sampled values are output as an index, based on which conversion factor are calculated.
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