1     Definition 2     Functional Requirements 3     Syntax
4     Semantics 5    Conformance Testing 6     Performance Assessment

1      Definition

A Data Type including the arrangement of the Audio Objects in a scene with their Audio Qualifiers.

In the following, Data, Objects, Qualifiers, and (Sub-)Scenes should be read as Audio Data, Audio Objects, Audio Qualifiers, and Audio (Sub-)Scenes

2      Functional Requirements

Scene Geometry includes the arrangements of the Scenes – called Sub-Scenes – in addition to the arrangement of Objects.

3      Syntax

https://schemas.mpai.community/OSD/V1.4/data/AudioSceneGeometry.json

4      Semantics

Label Description
Header Audio Scene Geometry Header
– Standard-AudioSceneGeometry The characters “OSD-ASG-V”
– Version Major version – 1 or 2 characters
– Dot-separator The character “.”
– Subversion Minor version – 1 or 2 characters
MInstanceID Identifier of M-Instance.
SceneGeometryID Identifier of Scene Geometry.
ObjectCount Number of Objects in Scene.
SubSceneCount Number of Sub-Scenes in Scene.
SceneGeometrySpaceTime Space and Time of Scene Geometry.
SceneObjects[] Set of Data related to Objects.
– SceneObjectQualifiers Qualifiers of Object.
– SceneObjectSpaceTime Space Time of Object.
SceneSubScenes[] Set of Sub-Scenes.
– SceneSubSceneSpaceTime Space Time of Sub-Scene.
DescrMetadata Descriptive Metadata

5     Conformance Testing

A Data instance Conforms with Audio Scene Geometry (OSD-ASG) if:

  1. The Data validates against the Scene Geometry’s JSON Schema.
  2. All Data in the  Scene Geometry’s JSON Schema
    1. Have the specified type
    2. Validate against their JSON Schemas
    3. Conform with their Data Qualifiers.

6     Performance Assessment