Patent ID: 7706549

Claim:
A broadside small array microphone beamforming apparatus, comprising: first and second omni-directional microphones respectively converting voice from a desired near-end talker into first and second signals with a first omni-directional polar pattern and a second omni-directional polar pattern respectively; a microphone calibration unit receiving the first and second signals and correspondingly outputting first and second calibration signals for adjusting phase of the first and second signals output by the first and second omni-directional microphones; and a directional microphone forming unit receiving the first and second calibration signals to generate a directional microphone signal with a bi-directional polar pattern according to the first and second calibration signals; and an adaptive channel decoupling unit receiving one of the first calibration signal or the second calibration signal in addition to the sum of the first calibration signal and the second calibration signal, wherein the adaptive channel decoupling unit further receives the directional microphone signal to generate a first main channel signal and a first reference channel signal for noise detection.