1     Definition

A Data Type including the Objects of an Audio-Visual Scene and their arrangement in the Scene.

2     Functional Requirements

Audio-Visual Basic Scene Descriptors include:

  1. The ID of a Virtual Space (M-Instance) where it is or is intended to be located.
  2. The ID of the Audio-Visual Scene Descriptors.
  3. The number of Objects in the Scene.
  4. The Space-Time Attributes of the Scene Descriptors.
  5. The Audio Objects including their inherent ID, Spatial Attitude, and Scene-specific Attributes.
  6. The Visual Objects including their inherent ID, Spatial Attitude, and Scene-specific Attributes.
  7. The AV Objects including their inherent ID, Spatial Attitude, and Scene-specific Attributes.

3     Syntax

  https://schemas.mpai.community/OSD/V1.1/data/AudioVisualBasicSceneDescriptors.json

4        Semantics

Label Size Description
Header N1 Bytes
·         Standard-Item 9 Bytes The characters “OSD-AVO-V”
·         Version N2 Byte Major version – 1 or 2 Bytes
·         Dot-separator 1 Byte The character “.”
·         Subversion N3 Bytes Minor version – 1 or 2 Bytes
MInstanceID N4 Bytes Identifier of M-Instance.
AVObjectID N5 Bytes Identifier of AV Object.
AudioObjectID N6 Bytes Identifier of Audio Object
AudioObjectSpaceTimeAttributes N7 Bytes Space-Time Attributes of Audio Object
VisualObjectID N8 Bytes Identifier of Visual Object
VisualObjectSpaceTimeAttributes N9 Bytes Space-Time Attributes of Visual Object
DescrMetadata N10 Bytes Descriptive Metadata

5     Data Formats

No new Data Formats

6     To Respondents

Respondents are invited to:

  1. Comment or elaborate on the Functional Requirements.
  2. Propose extensions to or alternative formats For the Audio-Visual Basic Scene Descriptors.