Sound emission and collection device and sound emission and collection method
US8855327B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 5, 2009 |
| Grant date | Oct 7, 2014 |
| Priority date | — |
| Expiry date | Jun 12, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M1/6008
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Provided is a sound emission and collection device capable of estimating the azimuth of a sound source (such as a main utterer) precisely without any processing load. The sound emission and collection device (1) is connected with another sound emission and collection device via a network or the like. The sound emission and collection device (1) receives a sound signal from another sound emission and collection device, as a sound emission signal (FE), and emits the same from a speaker (SP). The sound emission and collection device (1) collects the sound at microphones (MIC1 to MIC3), and produces sound collection beam signals (NE1 to NE3) of different azimuths. The sound emission and collection device down-samples the individual sound collection beam signals (NE1 to NE3), and filters out the echoes of the down-sampled sound collection beam signals (DNE1 to DNE3). The sound emission and collection device selects the sound collection beam signal (DNE1′) of the highest signal level from the echo-filtered sound collection beam signals (DNE1′ to DNE3′). The sound emission and collection device filters out the echoes of a sound collection beam signal (NE1) from the sound collection azimut…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.