Method and arrangement for reconstruction of a received speech signal
US6122607A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 25, 1997 |
| Grant date | Sep 19, 2000 |
| Priority date | — |
| Expiry date | Mar 25, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L19/04
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The present invention relates to a method and an arrangement for reconstruction of a received speech signal (r), which has been transmitted over a radio channel that has been subjected to disturbances, such as, e.g., noise, interference or fading. A speech signal (r.sub.rec), where the effects from these disturbances are minimized, is generated by an estimated speech signal (r), corresponding to expected future values of the received speech signal (r), produced according to a linear predictive reconstruction model in a signal modelling circuit. The received speech signal (r) and the estimated speech signal (r) are combined in a signal combination circuit according to a variable ratio, which ratio is determined by a quality parameter (q). The quality parameter (q) may be based on measured power level of a received power level of the desired ratio signal in proportion to an interfering radio signal or a bit error rate signal or bad frame indicator, which has been calculated from data signal that has been transmitted via a certain radio channel and which represents the received speech signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.