Systems and methods for hybrid adaptive noise cancellation
US9462376B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 23, 2013 |
| Grant date | Oct 4, 2016 |
| Priority date | — |
| Expiry date | Feb 1, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10K2210/509
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
In accordance with methods and systems of the present disclosure, a processing circuit may implement a feedback filter having a response that generates a feedback anti-noise signal component from a playback corrected error, the playback corrected error based on a difference between an error microphone signal and a secondary path estimate, and wherein the anti-noise signal comprises at least the feedback anti-noise signal component, a secondary path estimate filter configured to model an electro-acoustic path of the source audio signal and have a response that generates a secondary path estimate from the source audio signal, and a secondary coefficient control block that shapes the response of the secondary path estimate adaptive filter in conformity with a source audio signal and the playback corrected error by adapting the response of the secondary path estimate adaptive filter to minimize the playback corrected error.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.