Method and apparatus for mitigating feedback in a digital radio receiver
US9749021B2 · kind B2 · utility
1Cited by
20References
27Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 18, 2012 |
| Grant date | Aug 29, 2017 |
| Priority date | — |
| Expiry date | Dec 18, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M9/082
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Embodiments of an acoustic feedback suppressor determine the energy in each of a plurality of frequency bands of frames of an audio signal. The energy in each of the plurality of frequency bands is compared to characteristic of human voice to determine that a present frame contains content that is not likely human voice and exhibits a characteristic of feedback. Upon determining that feedback is occurring, an adaptive gain reduction is applied to the band in which feedback is suspected to be occurring.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.