12.4. Audio Composition
This section addresses the audio composition and presentation capabilities specified in the BIFS part of the MPEG-4 Systems standard [MPEG4-1]. The tools providing these functionalities are a subset of the BIFS tools called AudioBIFS (together with its extension, Advanced AudioBIFS, which was specified in the first amendment to the MPEG-4 Systems standard [AMD1-1]). The nodes included in AudioBIFS and Advanced AudioBIFS act as an interface between the systems and the audio components of MPEG-4 content. Audio composition is a process by which decoded audio streams (corresponding to different audio objects, possibly encoded with different coding methods) are combined at the terminal to form one or several audio tracks. Audio ...
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