| 摘要 |
PROBLEM TO BE SOLVED: To reduce the operation amount and power consumption. SOLUTION: A sound source signal outputted from a DSP 10 is analog- converted by a D/A converter 11, and an analog sound source signal and a predictive signal are added by an adder 14, and a synthetic sound signal is outputted, and the synthetic sound signal held by a sample-and-hold circuit 12 is outputted The predictive signal is synthesized so that the synthetic sound signal is delayed by analog delay circuits 16-18, and plural delayed synthetic sound signals are outputted, and a linear predictive coefficient outputted from a DSP 10 is inputted as a weight coefficient through a switcher 13 and registers 23-25, and the delayed synthetic sound signals are weighted by analog weight circuits 19-21, and plural weighted delayed synthetic sound signals are synthesized by an analog synthesizer 22, and the predictive signal is outputted. |
