Go to MPAI-OSD Data Types

Definition Functional Requirements Syntax Semantics Conformance Testing Performance Assessment

1    Definition

A Data Type including

  1. Data representing:
    1. A sound of the real world, or
    2. Synthetic Data intended for rendering as sound, or
    3. A mixture of the two types, and
  2. Optionally, descriptive Data regarding Audio Sub-Types, Formats and Attributes.

In the following, Data, Qualifier, and Object should be read as Audio Data, Audio Qualifiers, and Audio Object, respectively.

2     Functional Requirements

A Basic Object may include:

  1. The ID of a Virtual Space (M-Instance) where it is or is intended to be located.
  2. The ID of the Basic Object.
  3. The ID(s) of Parent Object(s) supporting two cases:
    1. The Parent Object has spawned two (or more) Objects.
    2. Two (or more) Parent Objects have merged into one.
  4. The Space-Time information of Parent Objects in an M-Instance.
  5. The ID(s) of Child Object(s).
  6. The Space-Time information of Child Objects in an M-Instance.
  7. The Space-Time information of the Basic Object in an M-Instance.
  8. The Qualifier of the specific Data Type.
  9. The Rights that can be exercised on the Basic Object.
  10. The set of Annotations including, for each Annotation:
    1. Space-Time information of the Annotation.
    2. Rights to perform Actions on the Annotation.

3     Syntax

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

4     Semantics

Label Description
Header AudioObject Header – Standard “OSD-BAO-V”
MInstanceID Identifier of M-Instance.
AudioObjectID Identifier of the Audio Object.
ParentAudioObjects[] Identifier(s) of Parent Audio Objects.
– ParentAudioObjectID Identifier of a Parent Audio Object.
– ParentAudioDataTime Time of this Parent Audio Object.
ChildAudioObjects[] Identifier(s) of Parent Audio Objects.
– ChildAudioObjectID Identifier of a Child Audio Object.
– ChildAudioDataSpaceTime SpaceTime of a Child Audio Object.
BasicAudioObjectSpace-Time Space-Time info of Audio Data.
BasicAudioObjectData Data of Basic Audio Object.
AudioDataQualifier Qualifier of Visual Data.
BasicAudioObjectProperties Additional information on Object
– BasicAudioObjectSpaceTime Space-Time of VisualAudio Object (may be overridden by Basic Audio Scene)
– Level The digital signal amplitude in dBFS.
– PerceptStatus Object has a perceptible Status (0=No, 1=Yes)
– Acoustic Profile Basic Audio Object’s Acoustic Profile.
– BasicAudioObjectIdentifier Identifier per Instance Identifier.
AudioQualifier Qualifier of the Audio Object Data.
DataXMData Other Information about this Basic Visual Object Instance.
DescrMetadata Descriptive Metadata

5     Conformance Testing

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

  1. The Data validates against the Basic Object’s JSON Schema.
  2. All Data in the Basic Object’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