| 摘要 |
PROBLEM TO BE SOLVED: To attain detailed sound field adjustment without increasing an arithmetic amount. SOLUTION: A received left audio signal Sig1-in is given to down-sampling circuits 2aL, 2bL, where the signal is down-sampled to extract a signal for a specific frequency band, then the waveform is adjusted by variable delay circuits 3aL-3fL, FIR filters 4aL-4fL, the resulting left signal is combined with the right signal which is similarly down-sampled to adjust its waveform, by a mixer, the sound volume of the resulting signal is adjusted by level adjustment volume circuits 6aL-6cL, 6aR-6cR to obtain an output sound signal whose sound field is adjusted. In this case, the original signal is adjusted by a variable delay circuit and a FIR filter, so as to adjust the sound field for the entire sound signal and the signal for a specified frequency band. |
