From e93a3e47ed04da2d2274f98e9e9479f1f9f60a78 Mon Sep 17 00:00:00 2001
From: digitaltvguy <chris.seeger@nbcuni.com>
Date: Sun, 10 Dec 2023 09:17:14 -0500
Subject: [PATCH 1/8] added dWLm chunk

1. Add dWLm chunk
2. Added ITI BT.2408 reference
3. Added ISO 22028-5 reference
---
 index.html | 69 ++++++++++++++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 67 insertions(+), 2 deletions(-)

diff --git a/index.html b/index.html
index dc52288..d222954 100644
--- a/index.html
+++ b/index.html
@@ -291,8 +291,19 @@
           publisher: "ITU",
           date: "2021-04",
           href: "https://www.itu.int/ITU-T/recommendations/rec.aspx?rec=14652"
-        }
-      }
+        },  
+        "ITU-R BT.2408": {
+          title: "Guidance for operational practices in HDR television production",
+          publisher: "ITU",
+          date: "09/2023",
+          href: "https://www.itu.int/pub/R-REP-BT.2408"
+        },  
+        "ISO/TS 22028-5": {
+          title: "Part 5: High dynamic range and wide colour gamut encoding for still images (HDR/WCG)",
+          publisher: "ISO",
+          date: "06/2023",
+          href: "https://www.iso.org/standard/81863.html"
+
     }
   </script>
 </head>
@@ -4233,6 +4244,60 @@ <h2><span class="chunk">cLLi</span> Content Light Level Information</h2>
         </section>
       </section>
 
+      <section id="dWLm-chunk">
+        <h2><span class="chunk">dWLm</span> Diffuse white luminance metadata</h2>
+        <p>The two-byte chunk type field contains the hexadecimal values</p>
+
+        <pre>
+<!-- xx xx xx xx
+</pre>
+
+        <p>If present, the <span class="chunk">dWLm</span> chunk stores the luminance value 
+          of the images nominal diffuse white, in cd/m2 as defined in [ISO/TS 22028-5]:</p>
+
+        <p>If the luminance of the diffuse white differs from the nominal luminance for an HDR reference displays
+          diffuse white as defined in in [[ITU-R-BT.2408]], the contents diffuse white luminance level
+          should be indicated using this metadata.</p>
+           
+         <p>The following specifies the syntax of the <span class="chunk">dWLn</span> chunk:</p>
+
+         <table id="dWLn-chunk-syntax" class="numbered simple">
+           <caption>dWLn chunk components</caption>
+
+           <tr>
+             <th>Name</th>
+             <th>Size</th>
+             <th>Divisor value</th>
+           </tr>
+
+           <tr>
+             <td>Diffuse white luminance metadata</td>
+             <td>2 bytes</td>
+             <td>1 cd/m<sup>2</sup></td>
+           </tr>
+
+         </table>
+
+         <aside class="example">
+           Example <span class="chunk">dWLn</span> Diffuse white luminance metadata:
+
+           <table id="dWLn-diffuse-white-luminance-metadata-example" class="numbered simple">
+             <tr>
+               <th>Actual value</th>
+               <th>Stored Decimal value</th>
+               <th>Stored 2-byte unsigned value</th>
+             </tr>
+
+             <tr>
+               <td>203 cd/m<sup>2</sup></td>
+               <td>203</td>
+               <td>CB 00</td>
+             </tr>
+           </table>
+         </aside>
+      </section>
+    </section>
+
 
 <!-- Maintain a fragment named "11textinfo" to preserve incoming links to it -->
       <section id="11textinfo">

From 59778298b4631cddc5ba6b72ae6c54630d2b1510 Mon Sep 17 00:00:00 2001
From: Chris Lilley <chris@w3.org>
Date: Tue, 13 Aug 2024 07:07:13 +0300
Subject: [PATCH 2/8] Update index.html

---
 index.html | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/index.html b/index.html
index d222954..7b44cd0 100644
--- a/index.html
+++ b/index.html
@@ -303,7 +303,7 @@
           publisher: "ISO",
           date: "06/2023",
           href: "https://www.iso.org/standard/81863.html"
-
+}
     }
   </script>
 </head>

From 8301e02f6c1c7fb24829841d8f262ebfae8dd271 Mon Sep 17 00:00:00 2001
From: Chris Lilley <chris@w3.org>
Date: Tue, 13 Aug 2024 07:07:53 +0300
Subject: [PATCH 3/8] Update index.html

---
 index.html | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/index.html b/index.html
index 7b44cd0..018d48f 100644
--- a/index.html
+++ b/index.html
@@ -295,7 +295,7 @@
         "ITU-R BT.2408": {
           title: "Guidance for operational practices in HDR television production",
           publisher: "ITU",
-          date: "09/2023",
+          rawDate: "2023-09",
           href: "https://www.itu.int/pub/R-REP-BT.2408"
         },  
         "ISO/TS 22028-5": {

From 178ad13466162c5710ef8634b99056b584cb12c3 Mon Sep 17 00:00:00 2001
From: Chris Lilley <chris@w3.org>
Date: Tue, 13 Aug 2024 07:08:07 +0300
Subject: [PATCH 4/8] Update index.html

---
 index.html | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/index.html b/index.html
index 018d48f..b666b9b 100644
--- a/index.html
+++ b/index.html
@@ -301,7 +301,7 @@
         "ISO/TS 22028-5": {
           title: "Part 5: High dynamic range and wide colour gamut encoding for still images (HDR/WCG)",
           publisher: "ISO",
-          date: "06/2023",
+          rawDate: "2023-06",
           href: "https://www.iso.org/standard/81863.html"
 }
     }

From fd0fc791be56ccd6ea6d623564017c5e8a291bd1 Mon Sep 17 00:00:00 2001
From: Chris Lilley <chris@w3.org>
Date: Tue, 13 Aug 2024 07:08:32 +0300
Subject: [PATCH 5/8] Update index.html

Co-authored-by: Chris Needham <chrisn@users.noreply.github.com>
---
 index.html | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/index.html b/index.html
index b666b9b..b119d2d 100644
--- a/index.html
+++ b/index.html
@@ -4253,7 +4253,7 @@ <h2><span class="chunk">dWLm</span> Diffuse white luminance metadata</h2>
 </pre>
 
         <p>If present, the <span class="chunk">dWLm</span> chunk stores the luminance value 
-          of the images nominal diffuse white, in cd/m2 as defined in [ISO/TS 22028-5]:</p>
+          of the images nominal diffuse white, in cd/m<sup>2</sup> as defined in [ISO/TS 22028-5]:</p>
 
         <p>If the luminance of the diffuse white differs from the nominal luminance for an HDR reference displays
           diffuse white as defined in in [[ITU-R-BT.2408]], the contents diffuse white luminance level

From 7a0a4bf5ea4f162c9db063f852ff335f1622ae0b Mon Sep 17 00:00:00 2001
From: Chris Lilley <chris@w3.org>
Date: Tue, 13 Aug 2024 07:08:50 +0300
Subject: [PATCH 6/8] Update index.html

Co-authored-by: Chris Needham <chrisn@users.noreply.github.com>
---
 index.html | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/index.html b/index.html
index b119d2d..cca8e5b 100644
--- a/index.html
+++ b/index.html
@@ -4255,7 +4255,7 @@ <h2><span class="chunk">dWLm</span> Diffuse white luminance metadata</h2>
         <p>If present, the <span class="chunk">dWLm</span> chunk stores the luminance value 
           of the images nominal diffuse white, in cd/m<sup>2</sup> as defined in [ISO/TS 22028-5]:</p>
 
-        <p>If the luminance of the diffuse white differs from the nominal luminance for an HDR reference displays
+        <p>If the luminance of the diffuse white differs from the nominal luminance for an HDR reference display's
           diffuse white as defined in in [[ITU-R-BT.2408]], the contents diffuse white luminance level
           should be indicated using this metadata.</p>
            

From cdcaf2f605645ae6fecf822e9c09d44c3f03e626 Mon Sep 17 00:00:00 2001
From: Chris Lilley <chris@w3.org>
Date: Tue, 13 Aug 2024 07:09:10 +0300
Subject: [PATCH 7/8] Update index.html

Co-authored-by: Chris Needham <chrisn@users.noreply.github.com>
---
 index.html | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/index.html b/index.html
index cca8e5b..303d643 100644
--- a/index.html
+++ b/index.html
@@ -4256,7 +4256,7 @@ <h2><span class="chunk">dWLm</span> Diffuse white luminance metadata</h2>
           of the images nominal diffuse white, in cd/m<sup>2</sup> as defined in [ISO/TS 22028-5]:</p>
 
         <p>If the luminance of the diffuse white differs from the nominal luminance for an HDR reference display's
-          diffuse white as defined in in [[ITU-R-BT.2408]], the contents diffuse white luminance level
+          diffuse white as defined in [[ITU-R-BT.2408]], the contents diffuse white luminance level
           should be indicated using this metadata.</p>
            
          <p>The following specifies the syntax of the <span class="chunk">dWLn</span> chunk:</p>

From fa30e77817a03a985f8f69e28c1b967394432afe Mon Sep 17 00:00:00 2001
From: Chris Lilley <chris@w3.org>
Date: Tue, 13 Aug 2024 07:09:49 +0300
Subject: [PATCH 8/8] Update index.html

---
 index.html | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/index.html b/index.html
index 303d643..99ff77e 100644
--- a/index.html
+++ b/index.html
@@ -4272,7 +4272,7 @@ <h2><span class="chunk">dWLm</span> Diffuse white luminance metadata</h2>
 
            <tr>
              <td>Diffuse white luminance metadata</td>
-             <td>2 bytes</td>
+             <td>4 bytes</td>
              <td>1 cd/m<sup>2</sup></td>
            </tr>