NOISE GATE APPARATUS FOR DIGITAL AUDIO PROCESSOR

A digital audio processor includes an input unit for converting an externally applied signal to a digital audio processor preferred type and a gain controller for multiplying a data converted in the input unit to control an input data size. A signal processor processes a signal outputted from the gain controller and a volume controller multiplies an output signal of the signal processor to control an output volume size. A first comparator compares a present signal and a previous signal respectively output from the input unit and a second comparator compares a present signal and a previous signal respectively output from the gain controller. A noise gate decreases a volume to a certain level when a present data is smaller than a previous data based on output values of the first and second comparators. An output unit converts an output value of the noise gate to an external output data type. The apparatus eliminates noise occurrence when a data size for an internal process becomes too small.