Echo suppression device, echo suppression method, and echo suppression program
US12108226B2 · kind B2 · utility
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Key dates
| Filing date | May 7, 2019 |
| Grant date | Oct 1, 2024 |
| Priority date | — |
| Expiry date | May 7, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L2021/02082
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
There is provided an echo suppression device that allows adding a natural comfort noise even in an environment in which a change in ambient noise is large. An echo is removed from an input signal to generate an echo-removed signal, a noise signal included in the echo-removed signal is estimated to generate an estimated noise signal, and a noise signal included in the echo-removed signal is suppressed based on the estimated noise signal to generate a suppressed signal. A comfort noise is generated based on the estimated noise signal, and the comfort noise is superimposed on the suppressed signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.