Speech analyzer detecting pitch frequency, speech analyzing method, and speech analyzing program
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United States of America Patent
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May 27, 2014
Grant Date -
Aug 20, 2009
app pub date -
Jun 2, 2006
filing date -
Jun 9, 2005
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A speech analyzer includes a speech acquiring section, a frequency converting section, an autocorrelation section, and a pitch detection section. The frequency converting section converts the speech signal acquired by the speech acquiring section into a frequency spectrum. The autocorrelation section determines an autocorrelation waveform by shifting the frequency spectrum along the frequency axis. The pitch detection section determines the pitch frequency from the distance between two local crests or troughs of the autocorrelation waveform.
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