SIGNAL PROCESSING DEVICE AND SIGNAL PROCESSING METHOD

摘要

Provided is a signal processing device including: a filter device to which an n-bit digital audio signal is input and that outputs an (n + α)-bit digital audio signal with which the amplitudes of frequency components that are received by a receiver device can be reduced[t1]; and a pulse-width-modulation device that applies pulse width modulation to the output from the filter unit by using a master clock, wherein the value of the α bits is set according to the resolution of the pulse-width-modulation unit.