Overview of Standards and Technical Reports

Overview of ARIB Standards (STD-B72)

1. Overview

STD Number ARIB STD-B72
Standard Name Colour Bar Test Pattern for Hybrid Log-Gamma (HLG) High Dynamic Range Television (HDR-TV) System
General Description

This standard specifies the colour bar as the reference signal of the HDR images in the HLG system which is specified by ARIB standard STD-B67.


In this standard, the 100% luminance signal pattern is added to the top of the colour bar based on the simplified pattern layout of STD-B66, and the code value for the HDR images is specified.


English version of this standard is official, as it is expected to be referred to by international standards.


HDR:High Dynamic Range
 HLG:Hybrid Log-Gamma


2. Amendment History

Ver. Amendment or Enactment Date Amendment summary
1.1 07.30.2019

In order to correspond with the widespread use of HDR, the following revisions are implemented.


・Clarification of the definition about the colour bar ramp waveform.


・Attachment of the HLG colour bar images which correspond to all video formats for the broadcasting systems specified in Japan.

1.0 01.22.2018 Enactment

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