[media] DocBook media: fix BT.2020 description
One number was wrong (0.6789 -> 0.6780) and Y' should have been Yc'. Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
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@ -1026,7 +1026,7 @@ The chromaticities of the primary colors and the white reference are:</para>
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<term>The luminance (Y') and color difference (Cb and Cr) are obtained with the
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following <constant>V4L2_YCBCR_ENC_BT2020</constant> encoding:</term>
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<listitem>
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<para>Y' = 0.2627R' + 0.6789G' + 0.0593B'</para>
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<para>Y' = 0.2627R' + 0.6780G' + 0.0593B'</para>
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<para>Cb = -0.1396R' - 0.3604G' + 0.5B'</para>
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<para>Cr = 0.5R' - 0.4598G' - 0.0402B'</para>
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</listitem>
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@ -1040,7 +1040,7 @@ clamped to the range [-0.5…0.5]. The Y'CbCr quantization is limited range
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<varlistentry>
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<term>Luma:</term>
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<listitem>
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<para>Yc' = (0.2627R + 0.6789G + 0.0593B)'</para>
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<para>Yc' = (0.2627R + 0.6780G + 0.0593B)'</para>
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</listitem>
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</varlistentry>
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</variablelist>
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@ -1048,7 +1048,7 @@ clamped to the range [-0.5…0.5]. The Y'CbCr quantization is limited range
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<varlistentry>
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<term>B' - Yc' ≤ 0:</term>
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<listitem>
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<para>Cbc = (B' - Y') / 1.9404</para>
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<para>Cbc = (B' - Yc') / 1.9404</para>
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</listitem>
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</varlistentry>
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</variablelist>
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@ -1056,7 +1056,7 @@ clamped to the range [-0.5…0.5]. The Y'CbCr quantization is limited range
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<varlistentry>
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<term>B' - Yc' > 0:</term>
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<listitem>
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<para>Cbc = (B' - Y') / 1.5816</para>
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<para>Cbc = (B' - Yc') / 1.5816</para>
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</listitem>
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</varlistentry>
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</variablelist>
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