| 摘要 |
A signal processor with a small circuit size, a simplified arrangement, and reduced cost and which can generate the same sound field as that in a case of listening to a reproduced sound using speakers to a location outside of a head of the listener has FIR filters and reverberation adding circuits. At an addition point provided to a tap midpoint of one FIR filter, a delay output signal of a tap end from another FIR filter is multiplied by a predetermined multiplication coefficient and then added. Output of one FIR filter is subjected to reverberation adding processing by the reverberation adding circuits and then output of yet another FIR filter is added to the above output to obtain an output signal. Therefore, even if the FIR filters with short tap lengths are used, long impulse response can be reproduced and a scale of signal processing can be reduced substantially.
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