Sound quality improving method and device, sound decoding method and device, and multimedia device employing same
US10304474B2 · kind B2 · utility
1Cited by
8References
17Claims
0Family size
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Key dates
| Filing date | Aug 17, 2015 |
| Grant date | May 28, 2019 |
| Priority date | — |
| Expiry date | Aug 17, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L19/20
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method of enhancing speech quality includes: generating a high-frequency signal by using a low-frequency signal in a time domain; combining the low-frequency signal with the high-frequency signal; transforming the combined signal into a spectrum in a frequency domain; determining a class of a decoded speech signal; predicting an envelope from a low-frequency spectrum obtained in the transforming; and generating a final high-frequency spectrum by applying the predicted envelope to a high-frequency spectrum obtained in the transforming.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.