Audio decoder for wind and microphone noise reduction in a microphone array system
US9858935B2 · kind B2 · utility
0Cited by
8References
20Claims
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Key dates
| Filing date | Dec 19, 2016 |
| Grant date | Jan 2, 2018 |
| Priority date | — |
| Expiry date | Dec 19, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2430/23
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An audio system encodes and decodes audio captured by a microphone array system in the presence of wind noise. The encoder encodes the audio signal in a way that includes beamformed audio signal and a “hidden” representation of a non-beamformed audio signal. The hidden signal is produced by modulating the low frequency signal to a high frequency above the audible range. A decoder can then either output the beamformed audio signal or can use the hidden signal to generate a reduced wind noise audio signal that includes the non-beamformed audio in the low frequency range.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.