AUDIO SIGNAL PROCESSING CIRCUIT, ON-VEHICLE AUDIO SYSTEM USING THE SAME, AUDIO COMPONENT APPARATUS, ELECTRONIC APPARATUS AND AUDIO SIGNAL PROCESSING METHOD

摘要

PROBLEM TO BE SOLVED: To achieve cost reduction and/or low power consumption for an audio system which can reproduce a high-resolution sound source.;SOLUTION: An audio signal processing circuit 100 includes a frequency band division section 110 and a main digital signal processing section 120. The frequency band division section 110 divides an input audio signal S_HR with an input sampling frequency fs₀ into a first signal S₁ including a first frequency band FB₁ and a second signal S₂ including a second frequency band FB₂ higher than the first frequency band FB₁. The first signal S₁ is down-sampled to an internal sampling frequency fs₁ lower than the input sampling frequency fs₀. The main digital signal processing unit 120 processes the first signal S₁.;SELECTED DRAWING: Figure 2;COPYRIGHT: (C)2018,JPO&INPIT