Method for encoding/decoding audio signals using audio semantic information and apparatus thereof

PURPOSE: An encoding/decoding method of audio signal and an apparatus thereof using audio semantic information are provided to increase encoding efficiency and minimize quantization noise. CONSTITUTION: An encoding/decoding method of audio signal using audio semantic information is as follows. Audio signal is converted into the signal of frequency area(310). The semantic information is extracted from audio signal(320). A subband is changeably reconstructed and divided by a subband(330). The quantized bit stream is generated by calculating scale factor(340). The signal of a frequency area is converted in tie domain. An audio codec converts the signal by using MDCT and FET.