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Martin,<br>
<br>
<font face="Courier New, Courier, monospace">Are you sure you are
looking for ITU-R BR.<i>138</i>?<br>
<br>
I've found </font><font face="Courier New, Courier, monospace">ITU-R
BR.1384-2 that starts with the same digits and deals with the same
subject. Please see if it is this one, which has 4, 8 and 12
channels:<br>
<a
href="https://www.itu.int/dms_pubrec/itu-r/rec/br/R-REC-BR.1384-2-201103-I%21%21PDF-E.pdf"><br>
https://www.itu.int/dms_pubrec/itu-r/rec/br/R-REC-BR.1384-2-201103-I!!PDF-E.pdf</a><br>
<br>
Part 1,<br>
<a
href="https://www.itu.int/dms_pubrec/itu-r/rec/br/R-REC-BR.1384-1-200504-S%21%21PDF-E.pdf"><br>
https://www.itu.int/dms_pubrec/itu-r/rec/br/R-REC-BR.1384-1-200504-S!!PDF-E.pdf</a><br>
<br>
is also available but it has been superseded by the former.<br>
<br>
Regards,<br>
<br>
Feedrico<br>
<br>
</font>
<div class="moz-cite-prefix">On 23/07/2015 14:04, Martin Leese
wrote:<br>
</div>
<blockquote
cite="mid:CAAzqGd-5St0b0cc+f6MO5JhLh0qTNF=tsCV-5MYemKvCRcswdQ@mail.gmail.com"
type="cite">
<pre wrap="">On 7/16/15, Martin Leese <a class="moz-txt-link-rfc2396E" href="mailto:martin.leese@stanfordalumni.org"><martin.leese@stanfordalumni.org></a> wrote:
</pre>
<blockquote type="cite">
<pre wrap="">Martijn van Beurden wrote:
</pre>
<blockquote type="cite">
<pre wrap="">I would propose: 0000-0111 : (number of independent channels)-1.
The channel order is defined through the
WAVEFORMATEXTENSIBLE_CHANNEL_MASK vorbis comment, if defined. If
no WAVEFORMATEXTENSIBLE_CHANNEL_MASK is present, the channel
order follows SMPTE/ITU-R recommendations, which are as follows:
</pre>
</blockquote>
<pre wrap="">
This looks like an excellent proposal.
</pre>
</blockquote>
<pre wrap="">
I tried to find the specific SMPTE/ITU-R
recommendation on channel order. I found a
reference to "ITU-R BR.138", but this is not
available from the ITU-R Recommendations
website. Does anybody have a copy of this?
I found lots of places which state the
SMPTE/ITU-R recommendation on channel
order. But all these are only for 5.1, and
are the usual front left, front right, front center,
LFE, surround left, surround right. I therefore
suspect the SMPTE/ITU-R recommendation is
only for 5.1.
With this in mind, I now propose the following
wording in the FLAC spec:
0000-0111 : (number of independent channels)-1. The channel assignment
and order is defined through the WAVEFORMATEXTENSIBLE_CHANNEL_MASK
FLAC tag. If no WAVEFORMATEXTENSIBLE_CHANNEL_MASK is present, the
channel assignment and order follow SMPTE/ITU-R recommendations (where
defined) and are as follows:
Regards,
Martin
</pre>
</blockquote>
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