Linear predictive analysis apparatus, method, program and recording medium
US10134419B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 6, 2018 |
| Grant date | Nov 20, 2018 |
| Priority date | — |
| Expiry date | Feb 6, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L25/21
- 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, it is assumed that a case where, for at least part of each order i, the coefficient wo(i) corresponding to each order i monotonically increases as a value having negative correlation with a fundamental frequency of an input signal in a current frame or a past frame increases and a case where the coefficient wo(i) monotonically decreases as a value having positive correlation with a pitch gain in a current frame or a past frame increases, are included.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.