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MPEG-4 Book, The by Touradj Ebrahimi, Fernando Pereira

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D.2. Audio Profile

The Audio scene graph profile provides for a set of BIFS scene graph elements for usage in audio-only applications (e.g., radio broadcasting).

Levels 1 to 4

Levels for the Audio scene graph impose the limitations on the BIFS tools using the parameters presented in Table D.3 [N4264].

Table D.1. Restrictions on the Transform2D node for Level 1 of the Simple 2D profile
Field NameRestrictions
addChildrenIgnored
removeChildrenIgnored
childrenX
centerIgnored
rotationAngle0
scale1, 1
scaleOrientation0
translationX
X = allowed; else: default value
Table D.2. Restrictions for the Simple 2D profile at Level 2
NodesRestrictions
OrderedGroupaddChildren and removeChildren not supported

order not supported

31 children maximum allowed
Sound2Dintensity ...

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