Audio processing device and method for echo cancellation
US11245983B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 6, 2018 |
| Grant date | Feb 8, 2022 |
| Priority date | — |
| Expiry date | Jul 6, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R3/007
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Provided are an audio processing device, an audio processing method, an information processing device, and a computer program that perform echo cancellation corresponding to double talk. The audio processing device includes an estimation unit that estimates a filter representing a transmission characteristic from a speaker where a reference signal is output to a microphone in which the reference signal sneaks, an adjustment unit that adjusts a step size on the basis of a filter update coefficient estimated by the estimation unit, and an update unit that updates the filter according to the update coefficient and the step size. The adjustment unit adjusts the step size on the basis of a ratio of power of the filter update coefficient to maximum power of the filter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.