Speech analyzer detecting pitch frequency, speech analyzing method, and speech analyzing program
US8738370B2 · kind B2 · utility
9Cited by
10References
9Claims
0Family size
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Key dates
| Filing date | Jun 2, 2006 |
| Grant date | May 27, 2014 |
| Priority date | — |
| Expiry date | Mar 23, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L25/90
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.