Method for determining intensity parameters of background noise in speech pauses of voice signals
US7277847B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 3, 2002 |
| Grant date | Oct 2, 2007 |
| Priority date | — |
| Expiry date | Sep 13, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L2025/786
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method for determining intensity characteristics of background noise during speech pauses of speech signals includes determining a proportion of speech pauses in the undisturbed source speech signal so as to define a frequency threshold. The disturbed speech signal is divided into short successive signal elements, an intensity value is determined for each of the signal elements, and a cumulative relative frequency distribution is formed from the determined intensity values of the signal elements. The cumulative relative frequency distribution is used to determine an intensity threshold value which corresponds to the defined frequency threshold. At least one intensity characteristic of the background noise during the speech pauses is determined using a region of the cumulative relative frequency distribution below the intensity threshold value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.