METHOD AND APPARATUS FOR EXTRACTING THE TARGET SOUND SIGNAL FROM THE MIXED SOUND

摘要

A method and an apparatus for extracting a target sound signal from a mixed sound are provided to clearly separate a specific sound signal from the mixed sound including a plurality of sounds. A microphone array(210) obtains sound signals outputted from a plurality of sound sources in a mixed sound type. A beam forming unit(220) improves an amplitude by assigning proper weight to each received signal. The beam forming unit functions as a filter which spatially reduces noise. A phase difference between the signals inputted to each microphone and an array pattern. An emphasizing signal beam forming unit increases directivity sensitivity about a specific target sound source. A sound source signal is inputted to the microphone array. An adder adds signals in which difference is generated to the time of arrival.