Methods and apparatus for silence quality measurement
US6490552B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 6, 1999 |
| Grant date | Dec 3, 2002 |
| Priority date | — |
| Expiry date | Oct 6, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L2021/02168
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Perceptual quality of a processed signal obtained by processing an original signal having silent periods is evaluated. Silent portions and speech portions of the original signal and corresponding silent portions and speech portions of the processed signal are identified, and the silent portions of the processed signal are evaluated in accordance with a function of amounts of energy contained in the silent portions of the processed signal, corresponding silent portions of the original signal, and an amount of energy in speech portions of the original signal. In one embodiment, the original signal and the processed signal are segmented into frames, frames of the original signal that represent speech and frames of the original signal that represent silence are identified, and the evaluation produces a mean opinion score (MOS).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.