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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Hi. I was just now leafing through the Digital Motion Imagery pink sheets, in preparation for voting to send it to agency review, when some language in 3.7.22
caught my eye:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal">CFDP provides the following two classes for file transmission:
<o:p></o:p></p>
<p class="MsoList" style="mso-list:l0 level1 lfo1"><![if !supportLists]><span style="mso-list:Ignore">–<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>Class 1—Unreliable CFDP transfer over a reliable UT layer;<o:p></o:p></p>
<p class="MsoList" style="mso-list:l0 level1 lfo1"><![if !supportLists]><span style="mso-list:Ignore">–<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>Class 2—Reliable CFDP.<o:p></o:p></p>
<p class="MsoList" style="margin-left:0in;text-indent:0in">For video data, class 2 CFDP shall be used for end-to-end reliability; however, user requirements may stipulate that Class 1 CFDP may be utilized.
<o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">A pre-RID, I guess: we really are trying to slowly deprecate class-2 CFDP in favor of running class-1 CFDP over BP/LTP (or just over LTP). That policy isn’t
yet so fully established as to merit a SHALL in this language, but maybe a SHOULD. Something like “Class-1 CFDP is recommended for the transmission of video data files. For reliable transmission, class-1 CFDP over a reliable UT layer, with closure requested,
is recommended.”<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Scott<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> CESG <cesg-bounces@mailman.ccsds.org>
<b>On Behalf Of </b>Burleigh, Scott C (US 312B) via CESG<br>
<b>Sent:</b> Thursday, April 16, 2020 6:44 PM<br>
<b>To:</b> Thomas Gannett <thomas.gannett@tgannett.net><br>
<b>Cc:</b> 'sis-mia@mailman.ccsds.org' <sis-mia@mailman.ccsds.org>; cesg@mailman.ccsds.org<br>
<b>Subject:</b> [EXTERNAL] [CESG] Resolution SIS-R-2020-04-001 Agency Review of CCSDS 766.1-B-2 Digital Motion Imagery<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p><span style="font-size:10.0pt;font-family:"Verdana",sans-serif">Hi. A resolution from SIS:<br>
<br>
The Space Internetworking Services Area,<br>
<br>
CONSIDERING that<br>
<br>
· the Motion Imagery and Applications (MIA) Working Group has reviewed Pink Sheets that add the h.265 compression protocol to the Digital Motion Imagery Blue Book, and<o:p></o:p></span></p>
<p style="margin-top:12.0pt"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif">· the Working Group has reached consensus on requesting Agency Review of these Pink Sheets,<o:p></o:p></span></p>
<p style="margin-top:12.0pt"><span style="font-size:10.0pt;font-family:"Verdana",sans-serif">RESOLVES to request that CESG approve an Agency Review of the Pink Sheets titled “CCSDS 766.1-B-2 Digital Motion Imagery”.<br>
<br>
Scott</span><o:p></o:p></p>
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