12.5. Summary
In this chapter, the MPEG-4 audio SNHC and composition tools were presented. The SNHC framework enables both synthetic and natural audio, as well as digital sound effects, to be included in a single MPEG-4 presentation. The main tools for synthetic audio coding, structured audio (SA), and the text-to-speech interface (TTSI), were presented. Finally, the tools related to the composition and presentation of sound that are defined in the Systems part of MPEG-4 were discussed. These tools are known as AudioBIFS and its extension, Advanced AudioBIFS.
The application areas of the MPEG-4 SNHC audio and audio composition tools range from digital sound synthesis and TTS synthesis to postprocessing and mixing of natural and synthetic audio, ...
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