1 Definition
A Data Type including the Objects of an Audio-Visual Scene, Audio-Visual Scenes, and their arrangement in the Scene.
2 Functional Requirements
Audio-Visual Scene Descriptors include Objects and Basic Scenes.
3 Syntax
{
4 Semantics
| Label | Size | Description |
| Header | N1 Bytes | |
| · Standard-AVScene | 9 Bytes | The characters “OSD-AVS-” |
| · Version | N2 Bytes | Major version – 1 or 2 characters |
| · Dot-separator | 1 Byte | The character “.” |
| · Subversion | N3 Bytes | Minor version – 1 or 2 characters |
| MInstanceID | N4 Bytes | Identifier of M-Instance. |
| AVSceneDescriptorsID | N5 Bytes | Identifier of the AV Object. |
| ObjectCount | N6 Bytes | Number of Objects in Scene |
| AVSceneDescriptorsSpaceTime | N7 Bytes | Data about Time |
| AudioSceneObjects[] | N8 Bytes | Set of Audio Objects |
| · AudioSceneObjectID | N9 Bytes | ID of Attribute of Audio Scene Object |
| o AudioSceneObjectSpaceTime | N10 Bytes | ID of Attribute Format of Audio Object |
| · AudioSceneObjectAttributes[] | Length of Attribute Format Data of Audio Object | |
| o AudioSceneObjectAttributeID | N11 Bytes | URI of Attribute Format Data of Audio Scene Object |
| o AudioSceneObjectAttributeFormatID | N12 Bytes | ID of Attribute Format of Audio Scene Object |
| o AudioSceneObjectAttributeDataLength | N13 Bytes | Length of Attribute Format of Audio Object |
| o AudioSceneObjectAttributeDataURI | N14 Bytes | URI of Attribute Format Data of Audio Object |
| VisualSceneObjects[] | N15 Bytes | Set of Visual Objects |
| · VisualSceneObjectID | N16 Bytes | ID of Attribute of Visual Scene Object |
| o VisualSceneObjectSpaceTime | N17 Bytes | ID of Attribute Format of Visual Object |
| · VisualSceneObjectAttributes[] | N18 Bytes | Length of Attribute Format Data of Visual Object |
| o VisualSceneObjectAttributeID | N19 Bytes | URI of Attribute Format Data of Visual Scene Object |
| o VisualSceneObjectAttributeFormatID | N20 Bytes | ID of Attribute Format of Visual Scene Object |
| o VisualSceneObjectAttributeDataLength | N21 Bytes | Length of Attribute Format of Visual Object |
| o VisualSceneObjectAttributeDataURI | N22 Bytes | URI of Attribute Format Data of Visual Object |
| AVSceneObjects[] | N23 Bytes | Set of AV Objects |
| · AVSceneObjectID | N24 Bytes | ID of Attribute of AV Scene Object |
| · AVSceneObjectSpaceTime | N25 Bytes | ID of Attribute Format of AV Object |
| · AVSceneObjectAttributes[] | Length of Attribute Format Data of AV Object | |
| o AVSceneObjectAttributeID | N26 Bytes | URI of Attribute Format Data of AV Scene Object |
| o AVSceneObjectAttributeFormatID | N27 Bytes | ID of Attrib. Format of AV Scene Object |
| o AVSceneObjectAttributeDataLength | N28 Bytes | Length of Attrib. Format of AV Object |
| o AVSceneObjectAttributeDataURI | N29 Bytes | URI of AV Object’s Attrib. Format Data |
| DescrMetadata | N30 Bytes | Descriptive Metadata |
5 Data Formats
No new Data Formats required.
6 To Respondents
MPAI requests comments on Functional Requirements of Audio-Visual Basic Scene Descriptors.
