Method and device for bandwidth extension
US9589568B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Feb 8, 2012 |
| Grant date | Mar 7, 2017 |
| Priority date | — |
| Expiry date | Mar 8, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L21/0388
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Method and device of extending a signal band of a voice or audio signal are provided. The bandwidth extension method includes the steps of: performing a modified discrete cosine transform (MDCT) process on an input signal to generate a first transform signal; generating a second transform signal and a third transform signal on the basis of the first transform signal; generating normalized components and energy components of the first transform signal, the second transform signal, and the third transform signal therefrom; generating an extended normalized component from the normalized components and generating an extended energy component from the energy components; generating an extended transform signal on the basis of the extended normalized component and the extended energy component; and performing an inverse MDCT (IMDCT) process on the extended transform signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.