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Definition Functional Requirements Syntax Semantics Conformance Testing Performance Assessment

1      Definition

An Item including a series of Audio-Visual Scene Descriptors for a duration.

2      Functional Requirements

An AudioVisual Event Descriptors instance must include:

  1. The AudioVisual Event Descriptors Header
  2. The ID of the AudioVisual Event Descriptors.
  3. The IDs or the AudioVisual Scene Descriptors of the AudioVisual Scene Descriptors included in the AudioVisual Event instance.

An AudioVisual Event Descriptors instance may include:

  1. The ID of a Virtual Space (M-Instance) to which it refers.
  2. The ID of a U-Environment to which it refers.
  3. The Space-Time information of the AudioVisual Event instance.
  4. Information about this AudioVisual Event instance.
  5. Descriptive Metadata.

3      Syntax

https://schemas.mpai.community/OSD/V1.5/data/AudioVisualEventDescriptors.json

4      Semantics

Label

Description

Header

AudioVisual Event Descriptors Header – Standard “OSD-mED-Vx.y”

MInstanceID

Identifier of the M-Instance.

UEnvironment

Identifier of the U-Environment.

AudioVisualEventDescriptorsID

ID of this AudioVisual Event Descriptors instance.

AudioVisualEventDescriptorsTime

Space and Time of AudioVisual Event Descriptors.

AudioVisualEventDescriptorsSpaceTime

Space and Time of AudioVisual Event Descriptors.

AudioVisualSceneDescriptors[]

Set of AudioVisual Scene Descriptors in the AudioVisual Event.

– AudioVisualSceneObjectSpaceTime

A set of AudioVisual Scene Descriptors of the AudioVisual Event.

DataXMData

Information on this AudioVisual Event Descriptors instance.

DescrMetadata

Descriptive Metadata

5     Conformance Testing

A Data instance Conforms with MPAI-OSD AudioVisual Event Descriptors (OSD-LED) if:

  1. The Data validates against the AudioVisual Event Descriptors’ JSON Schema.
  2. All Data in the AudioVisual Event Descriptors’ JSON Schema
    1. Have the specified type
    2. Validate against their JSON Schemas
    3. Conform with their Data Qualifiers if present.

6     Performance Assessment