Method and apparatus for improving call quality of hands-free call device, and hands-free call device
US9648154B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 29, 2015 |
| Grant date | May 9, 2017 |
| Priority date | — |
| Expiry date | Jun 29, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L2021/02166
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
The present invention discloses a method and an apparatus for improving the call quality of a hands-free call device, and a hands-free call device. The hands-free call device comprises a transmitter end composed of a main microphone and at least one auxiliary microphone. The method comprises: scanning within an initial first collection angle of a transmitter end; after a voice feature signal is scanned within the first collection angle, according to a direction of the voice feature signal, determining a second collection angle smaller than the first collection angle within the first collection angle; and calibrating the transmitter end to a direction determined by the second collection angle. In this method, voice pickup is conducted using a relatively small voice protection angle, so that the interference from ambient noise can be greatly reduced, to achieve the purpose of improving the transmission signal to noise ratio, thus the directivity of a voice in a hands-free call device during a call is more clear, which improves the call quality.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.