1 Definition | 2 Functional Requirements | 3 Syntax |
4 Semantics | 5 Conformance Testing | 6 Performance Assessment |
1 Definition
A Data Type including the Audio-Visual Scene’s Objects and Sub-Scenes and their arrangement in the Scene.
2 Functional Requirements
Audio-Visual Scene Descriptors includes Scenes in addition to Objects.
3 Syntax
https://schemas.mpai.community/OSD/V1.1/data/AudioVisualSceneDescriptors.json
4 Semantics
Label | Size | Description |
Header | N1 Bytes | Audio-Visual Scene Descriptors Header |
– Standard-AVSceneDescriptors | 9 Bytes | The characters “OSD-AVS-V” |
– 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. |
AVBasicSceneDescriptorsID | N5 Bytes | Identifier of the AV Object. |
ObjectCount | N6 Bytes | Number of Objects in Scene |
AVSceneSpaceTime | N7 Bytes | Data about Space and Time |
AudioObjectsData[] | N8 Bytes | Set of Audio Objects |
– AudioObject | N9 Bytes | ID of Audio Object |
– AudioObjectSpaceTime | N10 Bytes | Space-Time of Audio Object |
– AudioObjectPayload | N11 Bytes | Length in Bytes and URI of Audio Object Payload |
SpeechObjectsData[] | N12 Bytes | Set of SpeechObjects |
– SpeechObject | N13 Bytes | Speech Object |
– SpeechObjectSpaceTime | N14 Bytes | Space-Time of Speech Object |
VisualObjectsData[] | N15 Bytes | Set of Visual Objects |
– VisualObjectID | N16 Bytes | ID of Visual Object |
– VisualObjectSpaceTime | N17 Bytes | Space-Time of Visual Object |
– VisualObjectPayload | N18 Bytes | Length in Bytes and URI of Visual Object Payload |
AudioVisualObjectsData[] | N19 Bytes | Set of Audio-Visual Objects |
– AudioVisualObjectID | N18 Bytes | ID of Audio-Visual Object |
– AudioObjectSpaceTime | N19 Bytes | Space-Time of Audio-Visual Object |
SubSceneCount | N20 Bytes | Number of Sub-Scenes in Scene |
SubSceneData[] | N21 Bytes | Set of Sub-Scenes |
– SubSceneID | N22 Bytes | ID of Sub-Scene |
– SubSceneSpaceTime | N23 Bytes | Space-Time of Sub-Scenes |
– Payload | N24 Bytes | Length in Bytes and URI of Sub-Scene Payload |
DescrMetadata | N25 Bytes | Descriptive Metadata |
5 Conformance Testing
A Data instance Conforms with Audio-Visual Scene Descriptors (OSD-AVS) V1.2 if:
- The Data validates against the Audio-Visual Scene Descriptors’ JSON Schema.
- All Data in the Audio-Visual Scene Descriptors’ JSON Schema
- Have the specified type
- Validate against their JSON Schemas
- Conform with their Data Qualifiers if present.