Spatial correlation matrix estimation device, spatial correlation matrix estimation method, and spatial correlation matrix estimation program
US10643633B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 1, 2016 |
| Grant date | May 5, 2020 |
| Priority date | — |
| Expiry date | Mar 5, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L21/0308
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An observation feature value vector is calculated based on observation signals recorded at different positions in a situation in which target sound sources and background noise are present in a mixed manner; masks associated with the target sound sources and a mask associated with the background noise are estimated; a spatial correlation matrix of the target sound sources that includes the background noise is calculated based on the masks associated with the observation signals and the target sound sources; a spatial correlation matrix of the background noise is calculated based on the masks associated with the observation signals and the background noise; and a spatial correlation matrix of the target sound sources is estimated based on the matrix obtained by weighting each of the spatial correlation matrices by predetermined coefficients.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.