| 1 Function | 2 Reference Model | 3 Input/Output Data |
| 4 SubAIMs | 5 JSON Metadata | 6 Profiles |
| 7 Reference Software | 8 Conformance Texting | 9 Performance Assessment |
1 Functions
Audio Analysis Transform (CAE-AAT):
| Receives | Audio Object | As Multichannel Audio |
| Transforms | Multichannel Audio | into frequency bands via a Fast Fourier Transform (FFT). The following operations are carried out in discrete frequency bands. When such a configuration is used, a 50% overlap between subsequent audio blocks needs to be employed. The output is a data structure comprising complex valued audio samples in the frequency domain. |
| Produces | Audio Object | In the Transform domain. |
2 Reference Model
Figure 1 depicts the Reference Architecture of the Audio Analysis Transform (CAE-AAT) AIM.
Figure 1 – Audio Analysis Transform (CAE-AAT) AIM
3 Input/Output Data
Table 1 specifies the Input and Output Data of the Audio Analysis Transform (CAE-AAT) AIM.
Table 1 – Audio Analysis Transform (CAE-AAT) AIM
| Input | Description |
| Audio Object | Audio Object (with associate Microphone Array info) |
| Output | Description |
| Audio Object (Transform) | The result of the application of the Fast Fourier Transform to Multichannel Audio. |
4 SubAIMs
No SubAIMs.
5 JSON Metadata
https://schemas.mpai.community/CAE1/V2.3/AIMs/AudioAnalysisTransform.json
6 Profiles
No Profiles
7 Reference Software
8 Conformance Testing
Table 2 provides the Conformance Testing Method for the CAE-AAT AIM.
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, if present and conform with the Qualifier, if present.
Table 2 – Conformance Testing Method for CAE-AAT AIM
| Receives | Audio Object | Shall validate against Audio Object schema. Audio Data shall conform with Audio Qualifier. |
| Produces | Audio Object | Shall validate against Audio Object schema. Audio Data shall conform with Audio Qualifier. |
