Apparatus, method, and medium for distinguishing vocal sound from other sounds
US8078455B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 7, 2005 |
| Grant date | Dec 13, 2011 |
| Priority date | — |
| Expiry date | Oct 26, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L25/93
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An apparatus, method, and medium for distinguishing a vocal sound. The apparatus includes: a framing unit dividing an input signal into frames, each frame having a predetermined length; a pitch extracting unit determining whether each frame is a voiced frame or an unvoiced frame and extracting a pitch contour from the voiced and unvoiced frames; a zero-cross rate calculator respectively calculating a zero-cross rate for each frame; a parameter calculator calculating parameters including a time length ratio of the voiced frame and the unvoiced frame determined by the pitch extracting unit, statistical information of the pitch contour, and spectral characteristics; and a classifier inputting the zero-cross rates and the parameters output from the parameter calculator and determining whether the input signal is a vocal sound.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.