Audio Scene Geometry is a Data Type representing the spatial arrangement of the Audio Objects of a Scene.



Table 1 – Audio Scene Geometry Semantics

Label Size Description
HEADER 9 Bytes
·       Standard 7 Bytes The string CAE-ASD
·       Version 1 Byte Major version
·       Subversion 1 Byte Minor version
ASDID 16 Bytes UUID Identifier of Audio Scene Descriptors set.
Time 17 Bytes Collects various data expressed with bits
·       TimeType 0 bit 0=Relative: time starts at 0000/00/00T00:00
1=Absolute: time starts at 1970/01/01T00:00.
·       Reserved 1-7 bits
·       StartTime 8 Bytes Start of current Audio Scene Descriptors (in µs).
·       EndTime 8 Bytes End of current Audio Scene Descriptors (in µs).
AudioObjectCount 1 Byte Number of Audio Objects in the Audio Scene.
AudioObjectsData N1 Bytes Data associated to each Audio Object.
·       AudioObjectID 1 Byte ID of a specific Audio Object in the Audio Scene.
·       Reserved 6-7 bits
·       Spatial Attitude N2 Bytes Spatial Attitude of Audio Object.