High frequency content recovering method and device for over-sampled synthesized wideband signal
US7151802B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 27, 1999 |
| Grant date | Dec 19, 2006 |
| Priority date | — |
| Expiry date | Oct 27, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L2019/0011
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
In a method and device for recovering the high frequency content of a wideband signal previously down-sampled, and for injecting this high frequency content in an over-sampled synthesized version of the wideband signal to produce a fill-spectrum synthesized wideband signal, a random noise generator produces a noise sequence having a given spectrum. A spectral shaping unit spectrally shapes the noise sequence in relation to linear prediction filter coefficients related to the down-sampled wideband signal. A signal injection circuit finally injects the spectrally-shaped noise sequence in the over-sampled synthesized signal version to thereby produce the full-spectrum synthesized wideband signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.