1   Definition

Annotations added to objects detected and represented by the Environment Sensing Subsystem conveying semantic information about the objects.

2   Functional Requirements

  1. Traffic Policeman using their hands or hand-held signs or whistle to signal stop, proceed, turn right/left etc.
  2. Road signs (lanes, turn right/left on the road, one way, stop signs, words on the road).
  3. Traffic signs – vertical signalisation (signs above the road, signs on objects, poles with signs).
  4. Traffic lights
  5. Walkways
  6. Traffic sound (siren, whistle, horn).

3   Syntax

https://schemas.mpai.community/CAV2/V1.0/data/TrafficSignalDescriptors.json

4   Semantics

In spite of the existence of UN-sponsored Treaties, there are many varieties of signalisations. Here we will only consider

Label Size Description
Header N1 Bytes Traffic Signal Descriptors Header
– Standard 9 Bytes The characters “MMM-TSD-V”
– Version N2 Bytes Major version – 1 or 2 Bytes
– Dot-separator 1 Byte The character “.”
– Subversion N3 Bytes Minor version – 1 or 2 Bytes
TrafficSignalDescriptorsID N4 Bytes Identifier of Traffic Signal Descriptors.
TrafficSignalDescriptorsData N5 Bytes Set of Traffic Signal Descriptors Data.
– AVScene Descriptors N6 Bytes AV Scene Descriptors with specific Traffic Signal Attributes
DescrMetadata N7 Bytes Descriptive Metadata

5   Data Types and Formats

Traffic Signal Descriptors are Attributes of the Audio-Visual Scene’s Objects.

6   To Respondents

Respondents are requested to:

  1. Comment on, extend, or reformulate the Functional Requirements.
  2. Comment on the use MPAI Object and Scene Descriptors for Traffic Signal Descriptors needs.
  3. Identify Traffic Signal Descriptors Attributes.
  4. Propose alternative Traffic Signal Descriptors solutions.