Multiple-stage adaptive filtering of audio signals
US9685171B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 20, 2012 |
| Grant date | Jun 20, 2017 |
| Priority date | — |
| Expiry date | Jan 29, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L2021/02165
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The systems, devices, and processes described herein may include a first microphone that detects a target voice of a user within an environment and a second microphone that detects other noise within the environment. A target voice estimate and/or a noise estimate may be generated based at least in part on one or more adaptive filters. Based at least in part on the voice estimate and/or the noise estimate, an enhanced target voice and an enhanced interference, respectively, may be determined. One or more words that correspond to the target voice may be determined based at least in part on the enhanced target voice and/or the enhanced interference. In some instances, the one or more words may be determined by suppressing or canceling the detected noise.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.