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This is about the standard color bar signals used for testing.

ITU-R BT.471-1: Nomenclature and description of colour bar signals
This document provides a uniform system of description and formatting for the four principal colour bar test patterns in common use.



100％基準白レベルバー: 100% white reference level bar
０％基準黒レベルバー: 0% black reference level bar
75％振幅(白レベルを基準にする):75% amplitude (based on the white level)
100％飽和度: 100% saturation

"Color Bar Basics

The signal levels in each standard will be described using the color bar signal. This signal is often used because it exercises the extreme range of signal values allowed in each channel by any of the interconnect schemes.

In NTSC regions, it has been common practice to use a 75% amplitude color bar signal as a test stimulus and reference. In non-NTSC regions, the 100% amplitude color bar is preferred. But in both cases, the saturation of the color bars is kept at 100%. "

"The alignment tape for MII uses a 75% amplitude color bar with a 100% white reference level. "
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