| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an acoustic playback apparatus for easy making-out when a plurality of channels are played back at the same time. <P>SOLUTION: Two or more microphones arranged linearly in a known array and two or more speakers arranged linearly in a known array, constitute one set. An adaptive filter is acquired from the plurality of sets and an output signal from each microphone. An acoustic processing part applies the acquired adaptive filter to a speech reception signal. The acoustic processing part includes a level comparator which compares levels of output signals from the microphones, an adaptive filter calculation part which calculates a filter factor so that a dead angle in directivity of a reproduced voice coming from each speaker is formed for a speaking person for each set based on the level of output signal from the microphone, and a filter adaptation part which applies the filter factor to the speech reception signal for each set. <P>COPYRIGHT: (C)2013,JPO&INPIT |
