Signal enhancement device, method thereof, program, and recording medium
US8848933B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 5, 2009 |
| Grant date | Sep 30, 2014 |
| Priority date | — |
| Expiry date | Jul 21, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L2021/02082
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The initial values of parameter estimates are set, including reverberation parameter estimates, which includes a regression coefficient used in a linear convolutional operation for calculating an estimated value of reverberation included in an observed signal, source parameter estimates, which includes estimated values of a linear prediction coefficient and a prediction residual power that identify the power spectrum of a source signal, and noise parameter estimates, which include noise power spectrum estimates. Then, the maximum likelihood estimation is used to alternately repeat processing for updating at least one of the reverberation parameter estimates and the noise parameter estimates and processing for updating the source parameter estimates until a predetermined termination condition is satisfied.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.