| Definition | Functional Requirements | Syntax | Semantics | Conformance Testing | Performance Assessment |
1 Definition
A Data Type including the Audio-Visual Objects of a scene, their time and arrangement in the scene, and the Rights that may be exercised on the scene.
In the following Object and Scene are to be read as Audio-Visual Object and Audio-Visual Scene, respectively.
2 Functional Requirements
Basic Scene Descriptors include
- Objects
- Space-Time information.
The Space-Time of the Objects may be superseded by the Space-Time of the Scene.
3 Syntax
https://schemas.mpai.community/OSD/V1.5/data/BasicAudioVisualSceneDescriptors.json
4 Semantics
| Label | Description |
| Header | Basic Audio-Visual Scene Descriptors Header – Standard “OSD-BMS-Vx.y” |
| MInstanceID | Identifier of M-Instance. |
| SceneDescriptorsID | Identifier of Scene Descriptors. |
| ObjectCount | Number of Objects in Scene. |
| SceneDescriptorsSpaceTime | Space and Time of Scene Descriptors. |
| SceneObjects[] | Set of Objects. |
| – SceneObject | An Object. |
| – SceneObjectSpaceTime | Space Time of Object. |
| DataXMData | Information about this Basic Audio-Visual Scene Descriptors Instance. |
| DescrMetadata | Descriptive Metadata |
5 Conformance Testing
A Data instance Conforms with Basic Scene Descriptors (OSD-BMS) if:
- The Data validates against the Scene Descriptors’ JSON Schema.
- All Data in the Scene Descriptors’ JSON Schema
- Have the specified type
- Validate against their JSON Schemas
- Conform with their Data Qualifiers.
