<span style=" font-size:10pt;font-family:sans-serif">Dear Aaron, dear
all,</span>
<br>
<br><span style=" font-size:10pt;font-family:sans-serif">Good catch Aaron.</span>
<br><span style=" font-size:10pt;font-family:sans-serif">My only question
would be if we are not missing a definition for t>0 and D=3 in that
case, in which k_z(t)=1 should be used according to Annex F in the Green
Book.</span>
<br><span style=" font-size:10pt;font-family:sans-serif">If not, I understand
that by this change we force D=3 samples to be encoded with low entropy
codes only. In that case we should probably also change Annex F and the
Note in 5.4.3.3.5.1.4 to "When D<=3, the condition...".</span>
<br>
<br><span style=" font-size:10pt;font-family:sans-serif">Kind regards,</span>
<br>
<br><span style=" font-size:10pt;font-family:sans-serif">Roberto</span>
<br>
<br>
<br>
<br>
<br><span style=" font-size:8pt;color:#808080;font-family:sans-serif"><b>ESA
– European Space Agency</b></span>
<br><span style=" font-size:8pt;color:#00a1e0;font-family:sans-serif">Roberto
Camarero</span>
<br><span style=" font-size:8pt;color:#808080;font-family:sans-serif">Onboard
Payload Data Processing Engineer<br>
TEC-EFD / Electrical Engineering Department</span>
<br><span style=" font-size:8pt;color:#808080;font-family:sans-serif"><b>ESTEC</b><br>
Keplerlaan 1, PO box 299, <br>
NL-2200 AG Noordwijk, The Netherlands</span><span style=" font-size:8pt;color:blue;font-family:sans-serif"><u><br>
</u></span><span style=" font-size:8pt;color:#808080;font-family:sans-serif">roberto.camarero@esa.int
| </span><a href=www.esa.int/TEC/OBDP/><span style=" font-size:8pt;color:blue;font-family:sans-serif">www.esa.int/tec/</span></a><span style=" font-size:8pt;color:#808080;font-family:sans-serif"><br>
T +31 71 56 53508 | F +31 71 56 56791 | Room: Da213</span>
<br><span style=" font-size:10pt;color:#00a1e0;font-family:sans-serif">Join
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European Workshop on OnBoard Data Processing - OBDP2021 - 14-17 June 2021</u></span></a><span style=" font-size:8pt;color:#808080;font-family:sans-serif"><u>
</u></span>
<br>
<br>
<br>
<br>
<br><span style=" font-size:9pt;color:#5f5f5f;font-family:sans-serif">From:
</span><span style=" font-size:9pt;font-family:sans-serif">"Kiely,
Aaron B (US 332B)" <aaron.b.kiely@jpl.nasa.gov></span>
<br><span style=" font-size:9pt;color:#5f5f5f;font-family:sans-serif">To:
</span><span style=" font-size:9pt;font-family:sans-serif">"sls-dc@mailman.ccsds.org"
<sls-dc@mailman.ccsds.org></span>
<br><span style=" font-size:9pt;color:#5f5f5f;font-family:sans-serif">Date:
</span><span style=" font-size:9pt;font-family:sans-serif">08/04/2021
12:52 AM</span>
<br><span style=" font-size:9pt;color:#5f5f5f;font-family:sans-serif">Subject:
</span><span style=" font-size:9pt;font-family:sans-serif">[SLS-DC]
123B2 Corrigendum</span>
<br><span style=" font-size:9pt;color:#5f5f5f;font-family:sans-serif">Sent
by: </span><span style=" font-size:9pt;font-family:sans-serif">"SLS-DC"
<sls-dc-bounces@mailman.ccsds.org></span>
<br>
<hr noshade>
<br>
<br>
<br><tt><span style=" font-size:10pt">Dear Working Group,<br>
<br>
There is a minor issue with 123B2.<br>
<br>
The NOTE in 5.4.3.3.5.2 of 123B2 states that, “For high-entropy samples,
it can be shown that k_z(t)>=2.” In fact, as the standard is written
this isn’t true, it’s just extremely rare – it can only happen when
bit depth is D=3. (See Annex F of the Green Book.)<br>
<br>
We intended for the idea of this note to be normative, eliminating the
need to implement a code that would be used only for a very special case.
I believe we should request a corrigendum to do the following:<br>
1. In 5.4.3.3.5.2, change<br>
k_z(t) is the largest positive integer k_z(t)<=max{D-2,2}, such that…<br>
to<br>
k_z(t) is the largest integer 2<=k_z(t)<=max{D-2,2}, such that…<br>
2. Delete the NOTE in 5.4.3.3.5.2.<br>
3. In 5.4.3.3.5.1.4, change<br>
For t>0…<br>
to<br>
For t>0 and D>3, …<br>
<br>
Please let me know if this looks right, and if we have consensus I’ll
forward this to the Editor and Area Director.<br>
<br>
Thanks,<br>
Aaron[attachment "smime.p7s" deleted by Roberto Camarero/estec/ESA]
</span></tt>
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