1. Definition 2. Functional Requirements 3. Syntax 4. Semantics

1. Definition

Descriptors that are based on RE Data In from Performers, Objects, and Controllers in the Real Environment and have a form that is suitable for Interpretation (e.g., Position and Orientation, Face and Gestures, Controller Data). Performers may be captured by MoCap, one or more video cameras, and one or more microphones.

2. Functional Requirements

Performance Description AIM generates descriptors conveying information on:

  1. AV Scene Descriptors
  2.  Performers
    1. Performer ID
    2. Visual Performer object
    3. Visual attributes
      1. Position and Orientation
      2. Face and Gestures
    4. Performer Audio
    5. Performer Biometrics:
      1. Heart rate and Heart rate variability (HRV).
      2. Brain state from EEG data (delta, theta, alpha, beta, gamma).
      3. Galvanic Skin Response (Electrodermal Activity).
      4. Myoelectric intensity per electrode site.
      5. Skin temperature.
  3. Objects:
    1. ObjectID
    2. Visual Object Data
    3. Position and Orientation (Spatial Attitude) of set pieces.
    4. Other data (encoders, triggers, measuring devices, motion/proximity sensors, etc.).

3. Syntax

https://schemas.mpai.community/XRV1/V1.0/data/REPerformanceDescriptors.json

4. Semantics

Label Description
Header RE Performance Descriptors Header
– Standard-REPerformanceDescriptors The characters “XRV-RFD-V”
– Version Major version – 1 or 2 characters
– Dot-separator The character “.”
– Subversion Minor version – 1 or 2 characters
UEnvironmentID ID of U-Environment connect to M-Instance.
REPerformanceDescriptorsID Identifier of RE Participant Status
REPerformanceDescriptorsTime  Space-Time info of RE Performance Descriptors
AudioVisualSceneDescriptors  Descriptors of the AV Scene.
REPerformanceDescriptorsData[] Collection of Performance Descriptions.
– AudioVisualSceneDescriptors The Audio-Visual Scene of the stage.
– PerformerDescriptors[] Set of Performer Descriptions,
  – PerformerID ID of Performer.
  – SpatialAttitude Of Performer.
  – Avatar Performer’s Avatar.
  – UtteredSpeech Performer’s Uttered Speech.
  – BiometricObject Of Performer
  – ControllerData From Performer
– OtherObjects[] Set of Descriptors of other Objects.
  – ObjectID oneOf: knob, slider, button
  – Spatial Attitude Object Spatial Attitude.
  – ControlObject Variable Types in RE Venue Specification; signalled by DMX/Midi.
DescrMetadata Descriptive Metadata