1       Definition

A Data Type representing analogue signals generated by information captured by an ultrasonic sensor.

2       Functional Requirements

An active time-of-flight sensor typically operating in the 40 kHz to 250 kHz range.

The main features of Ultrasound are:

  1. Ability to monitor the immediate surroundings of the vehicle (≤ 10 m).
  2. Operation frequency above 30 kHz.
  3. Low-resolution images.

3       Syntax

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

https://schemas.mpai.community/OSD/V1.1/data/SpaceTime.json

4       Semantics

Label Size Description
Header N1 Bytes
·         Standard 9 Bytes The characters “CAV-IUS-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.
InputUltrasoundID N4 Bytes Identifier of Ultrasound Sensor.
InputUltrasoundTimeSpaceAttributes N5 Bytes Total duration of Input Ultrasound Data.
·         Duration N6 Bytes Duration of Ultrasound Data Block.
·         SpatialAttitude N7 Bytes CAV’s Spatial Attitude when getting Data.
InputUltrasoundData N8 Bytes
·         InputUltrasoundFormatID N9 Bytes Format ID of Input Ultrasound Data.
·         InputUltrasoundDataLength N10 Bytes Data Length of Input Ultrasound Data in Bytes.
·         InputUltrasoundDataURI N11 Bytes Location of Input Ultrasound Data.
AudioObjectAttributes[] N12 Bytes
·         InputUltrasoundAttributeID N13 Bytes ID of Attribute of Input Ultrasound Data
·         UltrasoundAttributeFormatID N14 Bytes ID of Attribute Format of Input Audio Data
·         InputUltrasoundAttributeLength N15 Bytes Number of Bytes in Input Ultrasound Data
·         InputUltrasoundAttributeDataURI N16 Bytes URI of Data of Input Ultrasound Data

5       Data Formats

Ultrasound Data Formats are required.

6       To Respondents

Respondents are invited to:

  1. Comment or elaborate on the functional requirements of Ultrasound images formats with the goal of achieving tracking and representation of objects for the Ultrasound Scene Description.
  2. Propose Data Formats and Attributes for use in the future Technical Specification: Data Types, Formats, and Attributes (MPAI-TFA).