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  PUBLIC "-//OASIS//DTD DITA Concept//EN" "concept.dtd">
<concept id="GUID-359E1198-B9F5-5EFD-B80B-C087E5A5DD1D" xml:lang="en"><title>Color
Conversion</title><shortdesc>This topic describes the color conversion between RGB and YUV.
The details depend on which YUV color space is used.</shortdesc><prolog><metadata><keywords/></metadata></prolog><conbody>
<p>For analogue signals (standard definition), the <b>ITU BT-601</b> formula
is used. </p>
<codeblock id="GUID-898BEBCA-ADC9-518A-B4AD-0C8DBF2AE87D" xml:space="preserve">R' = Y' + 1.403V'
G' = Y' - 0.344U' - 0.714V'
B' = Y' + 1.770U'</codeblock>
<p>For high-definition signals, the <b> ITU BT-709</b> formula is used. </p>
<codeblock id="GUID-24AA061D-9587-5D41-9246-5DBA5708BE75" xml:space="preserve">R' = Y' + 1.5701V'
G' = Y' - 0.1870U' - 0.4664V'
B' = Y' - 1.8556U'</codeblock>
<p>Where, </p>
<ul>
<li id="GUID-5B70C4D2-8E2C-53D8-9B7F-E19FEAC5CA5A">Y' is Y scaled to be in
the range [0, 1]. </li>
<li id="GUID-6F311DD9-F8DB-5672-8447-DF6FA756B8F5">U' and V' are the corresponding
samples scaled to the range [-0.5, 0.5]. </li>
<li id="GUID-3F2ED876-7B73-567F-A3C6-40A90AD40053">R', G' and B' then have
to be clamped to the range [0, 1] and scaled up as appropriate. </li>
</ul>
</conbody><related-links>
<link href="GUID-47701648-CEC1-564C-A6BF-CC42E78E701F.dita"><linktext>YUV Pixel
Formats Overview</linktext></link>
</related-links></concept>