Method and apparatus for enhancing loudness of a speech signal
US7676362B2 · kind B2 · utility
10Cited by
26References
15Claims
0Family size
Assignee
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Key dates
| Filing date | Dec 31, 2004 |
| Grant date | Mar 9, 2010 |
| Priority date | — |
| Expiry date | Oct 26, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L25/15
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A speech filter (108) enhances the loudness of a speech signal by expanding the formant regions of the speech signal beyond a natural bandwidth of the formant regions. The energy level of the speech signal is maintained so that the filtered speech signal contains the same energy as the pre-filtered signal. By expanding the formant regions of the speech signal on a critical band scale corresponding to human hearing, the listener of the speech signal perceives it to be louder even though the signal contains the same energy.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.