Acoustic echo cancellation using visual cues
US9767828B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 27, 2012 |
| Grant date | Sep 19, 2017 |
| Priority date | — |
| Expiry date | Feb 11, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N21/44218
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Techniques for enhancing an acoustic echo canceller based on visual cues are described herein. The techniques include changing adaptation of a filter of the acoustic echo canceller, calibrating the filter, or reducing background noise from an audio signal processed by the acoustic echo canceller. The changing, calibrating, and reducing are responsive to visual cues that describe acoustic characteristics of a location of a device that includes the acoustic echo canceller. Such visual cues may indicate that no human being is present at the location, that some subject(s) are engaged in speaking or sound generating activities, or that motion associated with an echo path change has occurred at the location.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.