<?xml version="1.0" encoding="utf-8"?>+
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<!-- Copyright (c) 2007-2010 Nokia Corporation and/or its subsidiary(-ies) All rights reserved. -->+
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<!-- This component and the accompanying materials are made available under the terms of the License +
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"Eclipse Public License v1.0" which accompanies this distribution, +
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and is available at the URL "http://www.eclipse.org/legal/epl-v10.html". -->+
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<!-- Initial Contributors:+
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    Nokia Corporation - initial contribution.+
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Contributors: +
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-->+
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<!DOCTYPE concept+
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  PUBLIC "-//OASIS//DTD DITA Concept//EN" "concept.dtd">+
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<concept id="GUID-359E1198-B9F5-5EFD-B80B-C087E5A5DD1D" xml:lang="en"><title>Color+
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Conversion</title><shortdesc>This topic describes the color conversion between RGB and YUV.+
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The details depend on which YUV color space is used.</shortdesc><prolog><metadata><keywords/></metadata></prolog><conbody>+
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<p>For analogue signals (standard definition), the <b>ITU BT-601</b> formula+
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is used. </p>+
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<codeblock id="GUID-898BEBCA-ADC9-518A-B4AD-0C8DBF2AE87D" xml:space="preserve">R' = Y' + 1.403V'+
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G' = Y' - 0.344U' - 0.714V'+
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B' = Y' + 1.770U'</codeblock>+
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<p>For high-definition signals, the <b> ITU BT-709</b> formula is used. </p>+
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<codeblock id="GUID-24AA061D-9587-5D41-9246-5DBA5708BE75" xml:space="preserve">R' = Y' + 1.5701V'+
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G' = Y' - 0.1870U' - 0.4664V'+
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B' = Y' - 1.8556U'</codeblock>+
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<p>Where, </p>+
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<ul>+
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<li id="GUID-5B70C4D2-8E2C-53D8-9B7F-E19FEAC5CA5A">Y' is Y scaled to be in+
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the range [0, 1]. </li>+
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<li id="GUID-6F311DD9-F8DB-5672-8447-DF6FA756B8F5">U' and V' are the corresponding+
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samples scaled to the range [-0.5, 0.5]. </li>+
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<li id="GUID-3F2ED876-7B73-567F-A3C6-40A90AD40053">R', G' and B' then have+
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to be clamped to the range [0, 1] and scaled up as appropriate. </li>+
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</ul>+
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</conbody><related-links>+
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<link href="GUID-47701648-CEC1-564C-A6BF-CC42E78E701F.dita"><linktext>YUV Pixel+
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Formats Overview</linktext></link>+
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</related-links></concept>+
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