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

1      Definition

A Data Type including Basic Audio Objects and Audio Objects.

Audio Objects have a hierarchical structure where Audio Objects contain Basic Audio Objects and Audio Objects.

2      Functional Requirements

An Audio Object may include:

  1. ID of a Virtual Space (M-Instance) where it is or intended to be located.
  2. ID of the Audio Object.
  3. Space-Time information of the Audio Object.
  4. Basic Audio Object and Audio Objects included in the Audio Objects.
  5. Annotation data set including:
    1. Annotations
    2. Space-Times of the Annotations.
    3. Rights to perform Actions on the Audio Object.
  6. The Rights that may be exercised on the Audio Object.

Note that.

  1. An Audio Object that does not include Sub-Scenes and only one Basic Audio Object is a Basic Audio Object.
  2. The Space-Time information of a Basic Audio Object, Audio Object included in an Audio Object may be superseded by the Space-Time information of the Audio Object containing it.

 

3      Syntax

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

4      Semantics

Label Description
Header Audio Object Header
– Standard-AudioObject The characters “OSD-AUO-V”
– Version Major version – 1 or 2 characters
– Dot-separator The character “.”
– Subversion Minor version – 1 or 2 characters
MInstanceID Identifier of M-Instance.
AudioObjectID Identifier of the Audio Object.
AudioObjectSpaceTime Space-Time of Audio Object.
BasicAudioObjectCount Set of Parent Audio Objects.
BasicAudioObjects[] Set of Basic Audio Objects.
– SpaceTime Space Time of a Basic Audio Object in the Audio Object.
– BasicAudioObject A Basic Audio Object in the Audio Object.
AudioObjectCount Number of Audio Objects.
AudioObjects[] Set of Audio Objects.
– SpaceTime Space Time of an Audio Object in the Audio Object.
– AudioObject An Audio Object in the Audio Object
Annotations[] Set of Audio Object Annotation.
– Annotation An Annotation.
– AnnotationSpaceTime Where Annotation is attached and when it will be active.
– Rights Actions that may be performed on the Annotation
Rights Actions that may be performed on the Object.
DescrMetadata Descriptive Metadata

5     Conformance Testing

A Data instance Conforms with Audio Object (OSD-AUO) if:

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

6     Performance Assessment