Definition
Functional Requirements
Syntax
Semantics
Conformance Testing
Performance Assessment
Definition
Ranked Audio Objects (PGM-RAO): The Audio Objects of the scene ordered by the salience score computed by Audio Salience Mapping.
Functional Requirements
- Header: The Data shall have Header “PGM-RAO-V1.0”.
- Identification: The Data shall carry the identifiers of the M‑Instance, of the U‑Environment and of the session, and a unique identifier and a time (RankedAudioObjectsID, RankedAudioObjectsTime).
- Ranking: The Data shall include the ranking, in order of rank.
- Metadata: The Data shall include DataXMData and may include DescrMetadata.
Syntax
https://schemas.mpai.community/PGM1/V1.0/data/RankedAudioObjects.json
Semantics
Table 1 – Semantics of Ranked Audio Objects
| Label | Description |
| Header | Header of the Data Type, with the version. (required) |
| MInstance | Identifier of the M-Instance. (required) |
| UEnvironment | Identifier of the U-Environment. (required) |
| SessionID | Identifier of the A-User session. (required) |
| RankedAudioObjectsID | Identifier of this instance. (required) |
| RankedAudioObjectsTime | Time at which the Data was produced. (required) |
| Ranking | The ranking, in order of rank. (required) |
| – AudioObjectID | Audio Object ID. (required) |
| – Rank | Position in the ranking, starting from 1. (required) |
| – SalienceScore | Salience score, 0 to 1. (required) |
| – Components | The dimensions that contributed to the score. |
| –– Physical | Motion, proximity, acoustic prominence and clarity. |
| –– Semantic | Audio object type. |
| –– Contextual | Directive and domain. |
| DataXMData | Data Exchange Metadata of MPAI-PTF: provenance, authorisation, security and confidence of the Data. |
| DescrMetadata | Descriptive metadata (plain text, at most 2048 characters). |
Conformance Testing
Data conforms with Ranked Audio Objects if it validates against the schema of Section 3. If a schema contains references to other schemas, conformance of data for the primary schema implies that any data referencing a secondary schema shall also validate against the relevant schema.
Performance Assessment
Not part of this specification.
