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The name MPEG-4 High-Efficiency AAC (HE-AAC) refers to a family of recent audio coders that were developed by the ISO/IEC Moving Picture Experts Group (MPEG) by subsequent extension of the established Advanced Audio Coding (AAC) architecture. These algorithmic extensions facilitate a significant increase in coding efficiency relative to previous standards(More)
We describe the VR-NaSty system as well as its evaluation and discuss some implications for the presentation of information. The VR-NaSty is a virtual narrator, which gets its content information enriched with meta information about a underlying story structure. It uses this information to calculate the expressiveness (or intensity) of its facial expression(More)
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