Efficient echo cancellation using transfer function estimation
US10090000B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 1, 2017 |
| Grant date | Oct 2, 2018 |
| Priority date | — |
| Expiry date | Nov 1, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2499/13
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Technical solutions are described for acoustic echo cancellation. An example method includes computing, by a beamformer, a plurality of updated beamformer filter coefficients, the beamformer filter coefficients computed adaptively to determine a speech signal from a plurality of input audio signals. Further, the method includes computing, by a transfer function estimator, a relative transfer function based on the updated beamformer filter coefficients and a plurality of present acoustic echo canceller coefficients. Further, the method includes adjusting a plurality of acoustic echo canceller coefficients using the relative transfer function, and generating an output speech signal, by the acoustic echo canceller, by cancelling echo components from the speech signal using the adjusted filter coefficients. Further, the method includes sending, by the acoustic echo canceller, the output speech signal to a far end speech device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.