APPARATUS AND METHOD FOR BEAMFORMING REFLECTIVE OF CHARACTER OF ACTUAL NOISE ENVIRONMENT

摘要

A beam forming apparatus for reflecting characteristics of an actual noise environment and a method thereof are provided to effectively apply a voice interface technology used between mobile devices to an environment having a noise. A beam forming apparatus for reflecting characteristics of an actual noise environment includes a microphone array(300) and a beam forming unit(310). The microphone array is composed of at least one microphone(300-1~300-N) to output an input signal inputted through the microphone. The beam forming unit has a coherence function generation unit(312), a spatial filter coefficient calculation unit(320), and a beam forming performing unit(322). The coherence function generating unit calculates the average of coherences in accordance with the same distance after the coherences are calculated according to each microphone interval with respect to the input signal. After the coherence function generating unit filters the calculated average coherences, the coherence function generating unit outputs the filtered value. The spatial filter coefficient calculation unit calculates a spatial filter coefficient by using the filtered average coherences to output. The beam forming performing unit outputs the noise processed signals by performing the beam forming for the input signal by using the spatial filter coefficient.