Abstract
This paper presents an overview of the MPEG audio standardization process as footsteps of the development of audio coding technologies in the last 25 years, with some technologies that the author has devoted a significant part of his career to as a research engineer. First, the development of audio coding technologies is overviewed by following the history of MPEG/Audio standardization. The MPEG-2/-4 AAC encoding process is then explained, which is now recognized as the standard framework for audio-data compression,followed by some technologies that the author has been deeply involved in as a research engineer. Finally, MPEG/Audio Standards are summarized from the viewpoint of redundancy reduction, and an outlook for the future is presented.
