MPEG - 4 ALS — International Standard for Lossless Audio Coding

This article explains the technologies and applications of lossless audio coding. NTT started research on lossless coding of audio signals and proposed the initiation of international standardization in 2002, aiming at high-quality services suitable for broadband networks. As a result of cooperative work with other organizations, the specifications of this technology were officially incorporated in the ISO/IEC MPEG standard published in March 2006 (ISO: International Standards Organization, IEC: International Electrotechnical Commission, MPEG: moving picture experts group). MPEG-4 ALS—International Standard for Lossless Audio Coding Letters † NTT Communication Science Laboratories Atsugi-shi, 243-0198 Japan E-mail: [email protected] *1 MiniDisc: System introduced by Sony Corporation as a digital replacement for conventional analog compact audio cassettes.