Apparatus, method, and computer program product for separating time series signals
US9349375B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Aug 15, 2013 |
| Grant date | May 24, 2016 |
| Priority date | — |
| Expiry date | Feb 16, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L21/0272
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
According to an embodiment, a signal processing apparatus includes an estimation unit and an updating unit. The estimation unit is configured to estimate an auxiliary variable of a target section including first and second sections of input signals by using an approximating auxiliary function for approximating an auxiliary function having an auxiliary variable as an argument. The auxiliary function is determined according to an objective function that outputs a function value that is smaller as a statistical independence of separated signals into which input signals in time-series are separated by a demixing matrix is higher. The estimation unit is configured to estimate a value of the auxiliary variable of the target section based on the estimated auxiliary variable. The updating unit is configured to update the demixing matrix such that a function value of the approximating auxiliary function is minimized.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.