Echo cancellation based on shared reference signals
US9779731B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 20, 2012 |
| Grant date | Oct 3, 2017 |
| Priority date | — |
| Expiry date | Jul 8, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L2021/02082
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An audio processing system configured to generate, based at least in part on captured sound, an audio signal that includes a speech component corresponding to a user's speech utterance and an audio component corresponding to audio output of another device is described herein. The audio processing system is also configured to receive a reference signal that corresponds to the audio output of the other device. The reference signal may be received as ultrasonic audio output of the other device or from a remote server. The audio processing device then processes the generated audio signal to remove at least a part of the generated audio signal that corresponds to the reference signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.