Comparison between AAC AND HE-AAC Models for Designing an Audio Codec

Abstract

The article discusses audio signal encoders and decoders while analyzing the human auditory system along with its handicaps in receiving the originally transmitted waveforms correctly; it also makes a brief introduction to the MPEG organization, its standards and the AAC, HE-AAC models taking in consideration its implementing possibilities on different platforms; in the final part of the paper, a conclusive example is given on the importance of coding a signal with HE-AAC.