Voice band extender separately extending frequency bands of an extracted-noise signal and a noise-suppressed signal
US8433057B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 5, 2010 |
| Grant date | Apr 30, 2013 |
| Priority date | — |
| Expiry date | Nov 15, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L21/0208
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A voice band extender includes a component separator for receiving a band-limited speech signal over a telecommunications line to separate the speech signal into a noise-suppressed signal and an extracted-noise signal, a noise-suppressed signal component extender for adding a signal having its frequency band higher than that of the noise-suppressed signal to thereby produce an extended noise-suppressed signal, an extracted-noise signal component extender for producing an extended extracted-noise signal, a signal intensity adjuster for adjusting signal intensity of either or both of the extended noise-suppressed signal and the extended extracted-noise signal, and a synthesizer for combining the extended noise-suppressed signal and the extended extracted-noise signal obtained by the intensity adjustment. The respective frequency bands of the extracted-noise signal and the noise-suppressed signal are thus extended.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.