Speech processing apparatus and method measuring signal to noise ratio and scaling speech and noise
US6965860B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 19, 2000 |
| Grant date | Nov 15, 2005 |
| Priority date | — |
| Expiry date | Apr 19, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L25/24
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A speech processing apparatus and method are provided for processing an input speech signal to compensate for the effects of noise in the input speech signal. The method and apparatus divide the input speech signal into a plurality of sequential time frames and a set of spectral parameters are extracted for each time frame, which parameters are representative of the input signal during the time frame. The system then processes the input speech by scaling the parameters for each frame in dependence upon a measure of the signal to noise ratio for the input frame. In this way, the effects of additive noise on the input signal can be reduced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.