Echo cancellation and control for microphone beam patterns
US9516409B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 15, 2015 |
| Grant date | Dec 6, 2016 |
| Priority date | — |
| Expiry date | Jun 4, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2430/23
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Systems and methods for controlling echo in audio communications between a near-end system and a far-end system are described. The system and method may intelligently assign a plurality of microphone beams to a limited number of echo cancellers for processing. The microphone beams may be classified based on generated statistics to determine beams of interest (e.g., beams with a high ratio of local-voice to echo). Based on this ranking/classification of microphone beams, beams of greater interest may be assigned to echo cancellers while less important beams may temporally remain unprocessed until these beams become of higher importance/interest. Accordingly, a limited number of echo cancellers may be used to intelligently process a larger number of microphone beams based on interest in the beams and properties of echo cancellation performed for each beam.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.