Echo cancelation using convolutive blind source separation
US10939205B2 · kind B2 · utility
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Key dates
| Filing date | Apr 19, 2019 |
| Grant date | Mar 2, 2021 |
| Priority date | — |
| Expiry date | Apr 19, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R3/02
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
For canceling acoustic echoing, a processor receives audio signals comprising a speaker output and an ambient input. The processor further calculates separated output signals from mixed signals using a separating transfer function. The processor calculates a criterion function based on the separated output signals. In addition, the processor calculates an acoustic echo transfer function based on maximizing the a criterion function. The processor separates a source signal from the audio signal using the acoustic echo transfer function.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.