Linear predictive analysis apparatus, method, program and recording medium
US9966083B2 · kind B2 · utility
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3Claims
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Key dates
| Filing date | Jan 20, 2015 |
| Grant date | May 8, 2018 |
| Priority date | — |
| Expiry date | Jan 20, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L25/90
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An autocorrelation calculating part calculates autocorrelation Ro(i) from an input signal. A predictive coefficient calculating part performs linear predictive analysis using modified autocorrelation R′o(i) obtained by multiplying the autocorrelation Ro(i) by a coefficient wo(i). Here, a case is comprised where, for at least part of each order i, the coefficient wo(i) corresponding to each order i monotonically decreases as a value having positive correlation with a pitch gain in an input signal of a current frame or a past frame increases.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.