Patent ID: 9648154
Date: 2017-05-09
CPC Classifications: G10L,H04M,H04R

Claim:
1. A method for improving the call quality of a hands-free call device that comprises a transmitter end composed of a main microphone and at least one auxiliary microphone, wherein the method comprises: scanning a voice feature signal within an initial first collection angle of the 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; wherein 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 comprises: making a reverse extension line through the main microphone in direction γ taking the main microphone and its virtual microphone as a new voice array, defining an angle β if not, taking the connection line between the main microphone and one of the auxiliary microphones as an axis of symmetry, defining a mirror angle β