Position-robust multiple microphone noise estimation techniques
US10242689B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 17, 2015 |
| Grant date | Mar 26, 2019 |
| Priority date | — |
| Expiry date | Nov 24, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2499/15
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Techniques are disclosed for position-robust multiple microphone noise estimation techniques. The position-robust noise estimation techniques can be used when receiving speech including diffuse noise sources, which is commonly encountered in noisy environments. The position-robust noise estimation techniques include detecting speech using the power level difference (PLD) and the coherence statistics (CS) between two microphone input signals. This multi-dimensional approach results in dual microphone noise estimation which is not affected by the position of the audio input device, resulting in more accurate detection of speech periods and more accurate noise estimation results. The position-robust noise estimate obtained from the techniques can then be used as part of a noise reduction system to reduce the levels of noise in noisy speech signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.