Beamforming and gainsharing mixing of small circular array of bidirectional microphones
US10313786B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 18, 2018 |
| Grant date | Jun 4, 2019 |
| Priority date | — |
| Expiry date | Jun 18, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2430/23
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A device including an array of bidirectional microphones optimizes the echo rejection of the bidirectional microphones. The microphone array receives audio from an audio source and generates audio signals from each of the bidirectional microphones. The device forms audio beams from combinations of the audio signals generated from the microphone array. Each audio beam captures audio from either its positive polarity zone or its negative polarity zone. The device determines a direction of the audio source and selects a perpendicular audio beam pair based on the direction of the audio source. The perpendicular audio beam pair includes a primary audio beam aimed toward the direction of the audio source and a secondary beam perpendicular to the primary audio beam. The device generates an output signal by combining the primary audio beam with the secondary audio beam based on polarity zone the audio is captured for each audio beam.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.