MPEG-4 Audio Lossless Coding (ALS) is a new extension of the MPEG-4 audio coding family. The MPEG-4 ALS codec is based on forward-adaptive linear prediction, which enables remarkable compression even with low complexity. Additional features include long-term prediction, multichannel coding, and compression of floating-point audio material. In this paper authors who have actively contributed to the standard describe the basic elements of the ALS codec with a focus on prediction, entropy coding, and related tools. It also presents latest developments during the standardization process and points out the most important applications of this new lossless audio format.

Authors: Harada, Noboru; Kamamoto, Yutaka; Liebchen, Tilman; Moriya, Takehiro; Reznik, Yuriy A.
Affiliations: NTT Communication Science Labs; Real Networks, Inc.; Technical University of Berlin(See document for exact affiliation information.)
AES Convention: 119 (October 2005) Paper Number: 6589
Publication Date: October 1, 2005
Subject: Audio Coding

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