--- a/ttml-ww-profiles/ttml-ww-profiles.html	Mon Sep 21 13:35:37 2015 -0700
+++ b/ttml-ww-profiles/ttml-ww-profiles.html	Mon Sep 21 14:23:03 2015 -0700
@@ -263,7 +263,6 @@
     "SUBM": "World Wide Web Consortium (W3C). <a href='http://www.w3.org/Submission/2013/SUBM-ttml-ww-profiles-20130607/'>TTML Text and Image Profiles for Internet Media Subtitles and Captions</a> (Member Submission, 07 June 2013)",
     "CEA-608": "<a href='http://www.ce.org/Standards/Standard-Listings/R4-3-Television-Data-Systems-Subcommittee/Line-21-Data-Service.aspx'>Line-21 Data Services</a>, ANSI/CEA Standard.",
     "CEA-708": "<a href='http://www.ce.org/Standards/Standard-Listings/R4-3-Television-Data-Systems-Subcommittee/CEA-708-D.aspx'>Digital Television (DTV) Closed Captioning</a>, ANSI/CEA Standard.",
-    "MHP": "ETSI TS 101 812 V1.3.1, Digital Video Broadcasting (DVB); Multimedia Home",
     "ST2052-1": "SMPTE ST 2052-1, Timed Text Format (SMPTE-TT) URL: <a href='https://www.smpte.org/standards '>https://www.smpte.org/standards</a>",
     "EBU-TT-D": "European Broadcasting Union (EBU). <a href='https://tech.ebu.ch/docs/tech/tech3380.pdf'>Tech 3380, EBU-TT-D Subtitling Distribution Format Version 1.0</a>",
     "CLDR": "Unicode Consortium. <a href='http://cldr.unicode.org'>The Common Locale Data Repository Project</a>"
@@ -2003,8 +2002,7 @@
 
         <li>the <code>div</code> element <em class="rfc2119" title="SHOULD">SHOULD</em> contain a <code>metadata</code> element containing an <code>ittm:altText</code> element that is a <a href="#dfn-text-alternative" class="internalDFN" data-link-type="dfn">text alternative</a> of the image referenced by the <code>smpte:backgroundImage</code> attribute; and</li>
 
-        <li>The <code>smpte:backgroundImage</code> attribute <em class="rfc2119" title="SHALL">SHALL</em> reference a complete image that conforms to the PNG image coding
-        as specified in Sections 7.1.1.3 and 15.1 of [<cite><a class="bibref" href="#bib-MHP">MHP</a></cite>]. If a pHYs chunk is present, it <em class="rfc2119" title="SHALL">SHALL</em> indicate square pixels. Note:
+        <li>The <code>smpte:backgroundImage</code> attribute <em class="rfc2119" title="SHALL">SHALL</em> reference a PNG datastream as specified in [<cite><a class="bibref" href="#bib-PNG">PNG</a></cite>]. If a pHYs chunk is present, it <em class="rfc2119" title="SHALL">SHALL</em> indicate square pixels. Note:
         If no pixel aspect ratio is carried, the default of square pixels is assumed.<br></li>
       </ul>
 			
@@ -3205,7 +3203,7 @@
 
 <section id="references" class="appendix" typeof="bibo:Chapter" resource="#references" property="bibo:hasPart"><!--OddPage--><h2 id="h-references" resource="#h-references"><span property="xhv:role" resource="xhv:heading"><span class="secno">G. </span>References</span></h2><section id="normative-references" typeof="bibo:Chapter" resource="#normative-references" property="bibo:hasPart"><h3 id="h-normative-references" resource="#h-normative-references"><span property="xhv:role" resource="xhv:heading"><span class="secno">G.1 </span>Normative references</span></h3><dl class="bibliography" resource=""><dt id="bib-CLDR">[CLDR]</dt><dd>Unicode Consortium. <a href="http://cldr.unicode.org" property="dc:requires">The Common Locale Data Repository Project</a>
 </dd><dt id="bib-EBU-TT-D">[EBU-TT-D]</dt><dd>European Broadcasting Union (EBU). <a href="https://tech.ebu.ch/docs/tech/tech3380.pdf" property="dc:requires">Tech 3380, EBU-TT-D Subtitling Distribution Format Version 1.0</a>
-</dd><dt id="bib-MHP">[MHP]</dt><dd>ETSI TS 101 812 V1.3.1, Digital Video Broadcasting (DVB); Multimedia Home
+</dd><dt id="bib-PNG">[PNG]</dt><dd>Tom Lane. <a href="http://www.w3.org/TR/PNG" property="dc:requires"><cite>Portable Network Graphics (PNG) Specification (Second Edition)</cite></a>. 10 November 2003. W3C Recommendation. URL: <a href="http://www.w3.org/TR/PNG" property="dc:requires">http://www.w3.org/TR/PNG</a>
 </dd><dt id="bib-RFC2119">[RFC2119]</dt><dd>S. Bradner. <a href="https://tools.ietf.org/html/rfc2119" property="dc:requires"><cite>Key words for use in RFCs to Indicate Requirement Levels</cite></a>. March 1997. Best Current Practice. URL: <a href="https://tools.ietf.org/html/rfc2119" property="dc:requires">https://tools.ietf.org/html/rfc2119</a>
 </dd><dt id="bib-ST2052-1">[ST2052-1]</dt><dd>SMPTE ST 2052-1, Timed Text Format (SMPTE-TT) URL: <a href="https://www.smpte.org/standards " property="dc:requires">https://www.smpte.org/standards</a>
 </dd><dt id="bib-TTML1">[TTML1]</dt><dd>Glenn Adams. <a href="http://www.w3.org/TR/ttml1/" property="dc:requires"><cite>Timed Text Markup Language 1 (TTML1) (Second Edition)</cite></a>. 24 September 2013. W3C Recommendation. URL: <a href="http://www.w3.org/TR/ttml1/" property="dc:requires">http://www.w3.org/TR/ttml1/</a>

--- a/ttml-ww-profiles/ttml-ww-profiles.source.html	Mon Sep 21 13:35:37 2015 -0700
+++ b/ttml-ww-profiles/ttml-ww-profiles.source.html	Mon Sep 21 14:23:03 2015 -0700
@@ -29,7 +29,6 @@
                                   "SUBM": "World Wide Web Consortium (W3C). <a href='http://www.w3.org/Submission/2013/SUBM-ttml-ww-profiles-20130607/'>TTML Text and Image Profiles for Internet Media Subtitles and Captions</a> (Member Submission, 07 June 2013)",
                   "CEA-608": "<a href='http://www.ce.org/Standards/Standard-Listings/R4-3-Television-Data-Systems-Subcommittee/Line-21-Data-Service.aspx'>Line-21 Data Services</a>, ANSI/CEA Standard.",
                   "CEA-708": "<a href='http://www.ce.org/Standards/Standard-Listings/R4-3-Television-Data-Systems-Subcommittee/CEA-708-D.aspx'>Digital Television (DTV) Closed Captioning</a>, ANSI/CEA Standard.",
-                  "MHP" : "ETSI TS 101 812 V1.3.1, Digital Video Broadcasting (DVB); Multimedia Home",
                   "ST2052-1": "SMPTE ST 2052-1, Timed Text Format (SMPTE-TT) URL: <a href='https://www.smpte.org/standards '>https://www.smpte.org/standards</a>",
                                   "EBU-TT-D": "European Broadcasting Union (EBU). <a href='https://tech.ebu.ch/docs/tech/tech3380.pdf'>Tech 3380, EBU-TT-D Subtitling Distribution Format Version 1.0</a>",
                                   
@@ -1648,8 +1647,7 @@
 
         <li>the <code>div</code> element SHOULD contain a <code>metadata</code> element containing an <code>ittm:altText</code> element that is a <a>text alternative</a> of the image referenced by the <code>smpte:backgroundImage</code> attribute; and</li>
 
-        <li>The <code>smpte:backgroundImage</code> attribute SHALL reference a complete image that conforms to the PNG image coding
-        as specified in Sections 7.1.1.3 and 15.1 of [[!MHP]]. If a pHYs chunk is present, it SHALL indicate square pixels. Note:
+        <li>The <code>smpte:backgroundImage</code> attribute SHALL reference a PNG datastream as specified in [[!PNG]]. If a pHYs chunk is present, it SHALL indicate square pixels. Note:
         If no pixel aspect ratio is carried, the default of square pixels is assumed.<br></li>
       </ul>