MP3 is worldwide the most commonly used audio coding scheme. Today it is present on virtually any computer, CD and DVD-Player, many car radios and of course in the many MP3 audio player devices. This paper describes a new MPEG-4 working draft, currently under development by ISO/MPEG, which will allow MP3 to be fully integrated into MPEG-4 Audio-Visual systems. Among other new features, like enhanced editability, MP3 is scheduled to get a full multi-channel audio capability, which can be implemented with a few additional lines of code on top of a standard stereo MP3 codec.
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