MPEG-4 ALS: Performance, Applications, and Related Standardization Activities
Noboru Harada, Takehiro Moriya, Yutaka Kamamoto · NTT technical review · 2007
MPEG published a new lossless audio coding scheme called MPEG-4 Audio Lossless Coding (ALS) in March 2006.This paper overviews MPEG-4 ALS and its possible applications.In addition, it introduces an audio archiving tool that uses MPEG-4 ALS as the encoding engine.This archiving tool offers excellent compression performance and functionality for handling several audio files as one archived file.Test results show that its compression performance, in terms of compression ratio and required processing time, is much better than that of ZIP when the input data is audio files.The tool's application format has been proposed to MPEG-A and is now being discussed as one of the multimedia application formats (MAFs) under the name MPEG-A Professional Archival MAF.Other recent standardization activities are also briefly mentioned.