Recording medium picked up equipment, sound collection method, and picked up the program

摘要

PROBLEM TO BE SOLVED: To provide a sound pickup device, a sound pickup method, a sound pickup program and a recording medium that can remarkably attenuate the sensitivity of speakers so as to effectively prevent howling.;SOLUTION: Virtual object sound sources (N channels) are used as reference signals, components from a dead angle direction (NBF: Null Beam Former) comprising N input channel sets from M sound pickup means are added to the reference signal signals, the N channels of the virtual object sound sources are given to N adaptive filters as input signals to activate the adaptive filters, obtained N adaptive filter coefficients are set to N variable filters, which act on signals from N sound pickup means among M sets of the means and N outputs are summed. However, the N channel virtual object sound sources and N sound pickup means correspond to each other uniquely and the virtual sound sources belonging to the input channels are used without fail.;COPYRIGHT: (C)2003,JPO