All of lore.kernel.org
 help / color / mirror / Atom feed
From: Hans Verkuil <hverkuil@xs4all.nl>
To: linux-media <linux-media@vger.kernel.org>
Subject: [PATCH] DocBook media: fix BT.2020 description
Date: Thu, 19 Mar 2015 15:31:10 +0100	[thread overview]
Message-ID: <550ADDAE.1000406@xs4all.nl> (raw)

One number was wrong (0.6789 -> 0.6780) and Y' should have been Yc'.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>

diff --git a/Documentation/DocBook/media/v4l/pixfmt.xml b/Documentation/DocBook/media/v4l/pixfmt.xml
index 13540fa..05b595c 100644
--- a/Documentation/DocBook/media/v4l/pixfmt.xml
+++ b/Documentation/DocBook/media/v4l/pixfmt.xml
@@ -1025,7 +1025,7 @@ the white reference are:</para>
       	  <term>The luminance (Y') and color difference (Cb and Cr) are obtained with the
 following <constant>V4L2_YCBCR_ENC_BT2020</constant> encoding:</term>
 	  <listitem>
-            <para>Y'&nbsp;=&nbsp;0.2627R'&nbsp;+&nbsp;0.6789G'&nbsp;+&nbsp;0.0593B'</para>
+            <para>Y'&nbsp;=&nbsp;0.2627R'&nbsp;+&nbsp;0.6780G'&nbsp;+&nbsp;0.0593B'</para>
             <para>Cb&nbsp;=&nbsp;-0.1396R'&nbsp;-&nbsp;0.3604G'&nbsp;+&nbsp;0.5B'</para>
             <para>Cr&nbsp;=&nbsp;0.5R'&nbsp;-&nbsp;0.4598G'&nbsp;-&nbsp;0.0402B'</para>
 	  </listitem>
@@ -1039,7 +1039,7 @@ clamped to the range [-0.5&hellip;0.5]. The Y'CbCr quantization is limited range
 	<varlistentry>
       	  <term>Luma:</term>
 	  <listitem>
-            <para>Yc'&nbsp;=&nbsp;(0.2627R&nbsp;+&nbsp;0.6789G&nbsp;+&nbsp;0.0593B)'</para>
+            <para>Yc'&nbsp;=&nbsp;(0.2627R&nbsp;+&nbsp;0.6780G&nbsp;+&nbsp;0.0593B)'</para>
 	  </listitem>
 	</varlistentry>
       </variablelist>
@@ -1047,7 +1047,7 @@ clamped to the range [-0.5&hellip;0.5]. The Y'CbCr quantization is limited range
 	<varlistentry>
       	  <term>B'&nbsp;-&nbsp;Yc'&nbsp;&le;&nbsp;0:</term>
 	  <listitem>
-            <para>Cbc&nbsp;=&nbsp;(B'&nbsp;-&nbsp;Y')&nbsp;/&nbsp;1.9404</para>
+            <para>Cbc&nbsp;=&nbsp;(B'&nbsp;-&nbsp;Yc')&nbsp;/&nbsp;1.9404</para>
 	  </listitem>
 	</varlistentry>
       </variablelist>
@@ -1055,7 +1055,7 @@ clamped to the range [-0.5&hellip;0.5]. The Y'CbCr quantization is limited range
 	<varlistentry>
       	  <term>B'&nbsp;-&nbsp;Yc'&nbsp;&gt;&nbsp;0:</term>
 	  <listitem>
-            <para>Cbc&nbsp;=&nbsp;(B'&nbsp;-&nbsp;Y')&nbsp;/&nbsp;1.5816</para>
+            <para>Cbc&nbsp;=&nbsp;(B'&nbsp;-&nbsp;Yc')&nbsp;/&nbsp;1.5816</para>
 	  </listitem>
 	</varlistentry>
       </variablelist>

                 reply	other threads:[~2015-03-19 14:31 UTC|newest]

Thread overview: [no followups] expand[flat|nested]  mbox.gz  Atom feed

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=550ADDAE.1000406@xs4all.nl \
    --to=hverkuil@xs4all.nl \
    --cc=linux-media@vger.kernel.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.