Two-channel adaptive microphone array with target tracking
Yoshifumi Nagata, Masato Abé · Electronics and Communications in Japan (Part III Fundamental Electronic Science) · 2000
This paper proposes a new robust adaptive microphone array suitable for a two-channel audio input system. This microphone array tracks a target speaker by using two adaptive beamformers and can reduce the target signal distortion, which is caused when the target signal is canceled in the case where the target direction differs from the initial look-direction of the microphone array. To enable target tracking, the directional responses of the beamformers are exploited to estimate the directions of arrival (DOA) of the target and the interference. In addition to the target tracking, a new arrangement of directional microphones is proposed to reduce the degradation of interference suppression caused by spatial aliasing. Simulation results show that the proposed microphone array can extract the signal from a moving target with high accuracy. © 2000 Scripta Technica, Electron Comm Jpn Pt 3, 83(12): 19–24, 2000