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

1      Definition

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

2      Functional Requirements

Audio-Visual Event Descriptors contains Audio-Visual Scene Descriptors for a Time.

3      Syntax

https://schemas.mpai.community/OSD/V1.3/data/AudioVisualEventDescriptors.json

4      Semantics

Label Size Description
Header N1 Bytes Audio-Visual Event Descriptors Header
– Standard-AudioVisualEventDescriptors 9 Bytes The characters “OSD-AVE-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.
EventID N5 Bytes Identifier of the Event.
EventSpaceTime 17 Bytes Data about start and end Space-Time.
SceneDescriptors[] N6 Bytes Set of Scene Descriptors
– SceneDescriptors N7 Bytes Set of AV Scene Descriptors of IDs.
DescrMetadata N8 Bytes Descriptive Metadata

5     Conformance Testing

A Data instance Conforms with MPAI-OSD Audio-Visual Event Descriptors V1.3 (OSD-AVE) if:

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

6     Performance Assessment