DIGITAL ELECTRONIC APPARATUS, AND METHOD FOR ADJUSTING SIGNAL LEVEL OF DIGITAL SIGNAL

摘要

PROBLEM TO BE SOLVED: To provide a digital electronic apparatus that can implement a compact device by simplifying a circuit for adjusting a signal level to keep constant power.SOLUTION: An audio system (digital electronic apparatus) 100 comprises: a peak detector 21 for detecting a digital value Xof an audio signal (digital signal); a central arithmetic device 22 for calculating a signal level Vof the audio signal and calculating a compression ratio (adjustment ratio) Cfor adjusting the calculated signal level Vto an available output level or lower, on the basis of the digital value Xdetected by the peak detector 21; and a signal level processing section 24 for adjusting the audio signal such that the signal level Vis at the available output level or lower on the basis of the compression ratio Ccalculated by the central arithmetic device 22.