Echo suppression device, echo suppression method and echo suppression program
US11039245B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 15, 2018 |
| Grant date | Jun 15, 2021 |
| Priority date | — |
| Expiry date | Jul 27, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R3/02
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A double-talk state can be accurately detected, and based on a detection result, echo can be appropriately suppressed. When a sound is output from a speaker and only the output sound is input to a microphone, a comparison is made, for each of different frequency bands, between a frequency mask generated based on a power spectrum or an amplitude spectrum for a learning signal transmitted through a transmitting signal path and a value of a power spectrum or an amplitude spectrum for an input signal input from the microphone, to detect whether there is a double-talk state. In a case of detecting that no signal is being transmitted through the transmitting signal path and that a signal is being transmitted through the receiving signal path, an echo suppressor is used to execute processing of suppressing an echo in the input signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.