Definition
Audio Scene Descriptors is a Data Type that includes the Geometry and the Objects of an Audio Scene.
Syntax
https://schemas.mpai.community/CAE/V2.1/data/AudioSceneDescriptors.json
Semantics
Table 1 – Audio Scene Descriptors 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 | reserved |
| · 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. |
| · SamplingRate | 0-3 bits | 0:8, 1:16, 2:24, 3:32, 4:44.1, 5:48, 6: 64, 7: 96, 8: 192 (all kHz) |
| · SampleType | 4-6 bits | (aka, sample precision) 0:8, 1:16, 2:24, 3:32, 4:64 (bits/sample) |
| · Reserved | 7 bit | |
| · Spatial Attitude | N2 Bytes | Spatial Attitude of Audio Object. |
| · AudioObject | N3 Bytes | Set of Audio Object Data. |
| · FormatID | 1 Byte | Format Identifier Audio Object. |
| ◦ ObjectLength | 4 Bytes | Number of Bytes in Audio Object. |
| ◦ DataInObject | N4 Bytes | Data of Audio Object. |
| ◦ |
