Residual echo estimator to estimate residual echo based on time correlation, non-transitory computer-readable medium storing program code to estimate residual echo, and application processor
US10854215B2 · kind B2 · utility
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Key dates
| Filing date | Aug 21, 2019 |
| Grant date | Dec 1, 2020 |
| Priority date | — |
| Expiry date | Aug 21, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L2021/02082
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A residual echo estimator estimates a residual echo of a microphone signal input to a microphone as a reference signal is output through a speaker. The residual echo estimator estimates a magnitude of a residual echo of the reference signal at a current frame by using a magnitude of the linear echo of the reference signal at the current frame and a magnitude of the linear echo of the reference signal at a past frame, and updates weights to be applied to the magnitudes of the linear echo.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.