| 摘要 |
PURPOSE:To make it possible to output a waveform with a few nioses by peforming the constatnt processing of data to be regenerated by paying attention to the entire waveform to be handled. CONSTITUTION:This unit consists of ROM1 stored with previously sampled and quantized values (sampled value) N0-Ni, buffer registers 2, 3, 9, 10 and 13, circuit 4 detecting a coincidence of amplitude, comparator 6 which compares the content of counter 5 with previously-assigned value (n), subtracter 7 which subtracts the content of register 3 from that of register 2, etc., and at every sampling frequency sf, sampled values N1-Ni are outputted composite waveforms by way of register 13, D/A converter 14 and output circuit 15. Namely, values of N4, N5 N6 and N10 indicated by black dots (the solid line indicates a waveform when this unit is not used) are corrected into values of amplitudes marked with crosses (the dotted line shows a waveform when this unit is used) and then outputted 15, and consequently sudden waveform variation is relieved, so that a composite waveform with a few noises can be obtained. |
