Determining an upperband signal from a narrowband signal
US8484020B2 · kind B2 · utility
34Cited by
17References
32Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 22, 2010 |
| Grant date | Jul 9, 2013 |
| Priority date | — |
| Expiry date | Aug 16, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L21/038
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method for determining an upperband speech signal from a narrowband speech signal is disclosed. A list of narrowband line spectral frequencies (LSFs) is determined from the narrowband speech signal. A first pair of adjacent narrowband LSFs that have a lower difference between them than every other pair of adjacent narrowband LSFs in the list is determined. A first feature that is a mean of the first pair of adjacent narrowband LSFs is determined. Upperband LSFs are determined based on at least the first feature using codebook mapping.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.