Method for determining speech quality by comparison of signal properties
US7013266B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 14, 1999 |
| Grant date | Mar 14, 2006 |
| Priority date | — |
| Expiry date | Aug 14, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L25/48
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
In a method for determining speech quality using an objective measure, in order to enhance prediction reliability of the evaluated quality parameters, distortions of the mean spectral envelope are extensively corrected with a weighting function WT(f) before comparing spectral properties. Additionally, the fixed band limits for integration of spectral power density are suppressed and other band limits are searched for instead in a predetermined optimization area in which the resulting spectral intensity representations of the voice signal to be evaluated and the reference voice signal have maximum similarity. The solutions described can supplement known methods and can be incorporated into their structures.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.