Speech detection device for the detection of speech end points based on variance of frequency band limited energy
US5617508A · kind A · utility
73Cited by
15References
7Claims
0Family size
Assignees
Inventor
Key dates
| Filing date | Aug 12, 1993 |
| Grant date | Apr 1, 1997 |
| Priority date | — |
| Expiry date | Aug 12, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L25/78
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The device detects the beginning and ending portions of speech contained within an input signal based on the variance of frequency band limited energy within the signal. The use of the variance allows detection which is relatively independent of an absolute signal-to-noise ratio with the signal, and allows accurate detection within a wide variety of backgrounds such as music, motor noise, and background noise, such as other speakers. The device can be easily implemented using off-the-shelf hardware along with a high-speed special purpose digital signal processor integrated circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.