APPARATUS FOR DECIDING ADAPTIVE TIME/FREQUENCY-BASED ENCODING MODE AND METHOD OF DECIDING ENCODING MODE FOR THE SAME

摘要

An apparatus and a method for determining an encoding mode are provided to achieve a high-compression performance by effectively using a coding gain of both a time-based encoding mode and a frequency-based encoding mode. A time domain feature extracting unit(410) analyzes a time domain signal of an input audio signal, thereby generating a time domain feature. A frequency domain feature extracting unit(420) analyzes a frequency domain signal of the input audio signal, thereby generating a frequency domain feature corresponding to each frequency band, which is obtained dividing a frequency domain corresponding to a frame of the input audio signal into a plurality of frequency domains. A mode determining unit(430) determines one of a time-based encoding mode and a frequency-based encoding mode as an encoding mode with respect to each frequency band by using at least one of the time domain feature and the frequency domain feature.