To control both throughput and power consumption while ensuring real time property to complete a specified process within a predetermined time period.
This signal processor comprises: a signal processing part to process signal data and output the result data; a power supply part which supplies power to the signal processing part; a clock supply part which supplies a clock to the signal processing part; a processing amount estimating part which estimates processing amount in the signal processing part based on the signal data and outputs the estimated processing amount value; a processing amount observation part which observes the processing amount of signal processing by the signal processing part and outputs a process completion value; and a control value determination part which determines the voltage of the power supply to the signal processing part and the frequency of the clock based on the estimated processing amount value, the process completion value, and lapse information indicating the time elapsed from the start of signal processing. The power supply part supplies power of the voltage determined by the control value determination part to the signal processing part, and the clock supply part supplies the clock of the frequency determined by the control value determination part to the signal processing part.
Toshimitsu Ichikawa
Kimihide Hashimoto
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