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<div class="moz-cite-prefix">The simple solution would be to try to
contact the people behind some of these websites and simply asking
how they do it. That might provide useful answers to whether any
encoding solution will be taken up by implementers.</div>
<div class="moz-cite-prefix"><br>
</div>
<div class="moz-cite-prefix">A./<br>
</div>
<div class="moz-cite-prefix"><br>
</div>
<div class="moz-cite-prefix">On 10/10/2020 3:02 PM, Kent Karlsson
via Unicode wrote:<br>
</div>
<blockquote type="cite"
cite="mid:A04CA5BD-A928-4EC1-9327-E21E2E9B4CFA@bahnhof.se">
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<br class="">
<div><span style="font-family: Calibri, sans-serif; font-size:
11pt;" class="">Here are a few more web sites showing Teletext
pages from various European TV channels.</span><br class="">
<span style="font-family: Calibri, sans-serif; font-size: 11pt;"
class="">THE LIST IS SURELY FAR FROM COMPLETE, it is just a
sample. But it does show that Teletext</span><br class="">
<span style="font-family: Calibri, sans-serif; font-size: 11pt;"
class="">is commonly displayed as web pages, not just via TV
channels (whether "analog" or DVB).</span><br class="">
<span style="font-family: Calibri, sans-serif; font-size: 11pt;"
class=""> </span><br class="">
<span style="font-family: Calibri, sans-serif; font-size: 11pt;"
class="">I haven't seen these combined with web versions of TV
channels, but that would surely</span><br class="">
<span style="font-family: Calibri, sans-serif; font-size: 11pt;"
class="">be possible to combine. That would be especially
useful for optional subtilting, where</span><br class="">
<span style="font-family: Calibri, sans-serif; font-size: 11pt;"
class="">Teletext is still much used, as a useful
accessibility feature.</span><br class="">
<span style="font-family: Calibri, sans-serif; font-size: 11pt;"
class=""> </span><br class="">
<span style="font-family: Calibri, sans-serif; font-size: 11pt;"
class="">I have no prediction of how long any channels will
continue to produce Teletext content.</span><br class="">
<span style="font-family: Calibri, sans-serif; font-size: 11pt;"
class="">But optional subtilting seems to "survive" longer.</span><br
class="">
<span style="font-family: Calibri, sans-serif; font-size: 11pt;"
class=""> </span><br class="">
<span style="font-family: Calibri, sans-serif; font-size: 11pt;"
class="">I do not know what source format(s) may be used, but
it is surely not HTML</span> <span style="font-family:
Calibri, sans-serif; font-size: 11pt;" class="">*nor* close</span></div>
<div><span style="font-family: Calibri, sans-serif; font-size:
11pt;" class="">to the Teletext protocol. But see the Teletext
page edit tool referenced below.</span><br class="">
<span style="font-family: Calibri, sans-serif; font-size: 11pt;"
class=""> </span><br class="">
<span style="font-family: Calibri, sans-serif; font-size: 11pt;"
class=""> </span><br class="">
<span style="font-family: Calibri, sans-serif; font-size: 11pt;"
class="">Spain, RTVE:</span><br class="">
<a href="https://www.rtve.es/television/teletexto/100/" class=""
style="font-family: Calibri, sans-serif; font-size: 11pt;"
moz-do-not-send="true">https://www.rtve.es/television/teletexto/100/</a><br
class="">
<span style="font-family: Calibri, sans-serif; font-size: 11pt;"
class=""> </span><br class="">
<span style="font-family: Calibri, sans-serif; font-size: 11pt;"
class="">Sweden, SVT:</span><br class="">
<a href="https://texttv.nu/" class="" style="font-family:
Calibri, sans-serif; font-size: 11pt;" moz-do-not-send="true">https://texttv.nu/</a> <span
style="font-family: Calibri, sans-serif; font-size: 11pt;"
class="">(also as iOS app, same name)</span><br class="">
<a href="https://www.svt.se/svttext/web/pages/100.html" class=""
style="font-family: Calibri, sans-serif; font-size: 11pt;"
moz-do-not-send="true">https://www.svt.se/svttext/web/pages/100.html</a><br
class="">
<span style="font-family: Calibri, sans-serif; font-size: 11pt;"
class=""> </span><br class="">
<span style="font-family: Calibri, sans-serif; font-size: 11pt;"
class="">Iceland, RÚV:</span><br class="">
<a href="http://textavarp.is/sida/100" class=""
style="font-family: Calibri, sans-serif; font-size: 11pt;"
moz-do-not-send="true">http://textavarp.is/sida/100</a><br
class="">
<span style="font-family: Calibri, sans-serif; font-size: 11pt;"
class=""> </span><br class="">
<span style="font-family: Calibri, sans-serif; font-size: 11pt;"
class="">Denmark, DR:</span><br class="">
<a href="https://www.dr.dk/cgi-bin/fttx1.exe/100" class=""
style="font-family: Calibri, sans-serif; font-size: 11pt;"
moz-do-not-send="true">https://www.dr.dk/cgi-bin/fttx1.exe/100</a><br
class="">
<span style="font-family: Calibri, sans-serif; font-size: 11pt;"
class=""> </span><br class="">
<span style="font-family: Calibri, sans-serif; font-size: 11pt;"
class="">Norway, NRK:</span><br class="">
<a href="https://www.nrk.no/tekst-tv/100/" class=""
style="font-family: Calibri, sans-serif; font-size: 11pt;"
moz-do-not-send="true">https://www.nrk.no/tekst-tv/100/</a><br
class="">
<span style="font-family: Calibri, sans-serif; font-size: 11pt;"
class=""> </span><br class="">
<span style="font-family: Calibri, sans-serif; font-size: 11pt;"
class="">Finland, YLE:</span><br class="">
<a href="https://yle.fi/aihe/tekstitv" class=""
style="font-family: Calibri, sans-serif; font-size: 11pt;"
moz-do-not-send="true">https://yle.fi/aihe/tekstitv</a><br
class="">
<span style="font-family: Calibri, sans-serif; font-size: 11pt;"
class=""> </span><br class="">
<span style="font-family: Calibri, sans-serif; font-size: 11pt;"
class="">Switzerland, SRF:</span><br class="">
<a href="https://www.teletext.ch/" class="" style="font-family:
Calibri, sans-serif; font-size: 11pt;" moz-do-not-send="true">https://www.teletext.ch/</a><br
class="">
<span style="font-family: Calibri, sans-serif; font-size: 11pt;"
class=""> </span><br class="">
<span style="font-family: Calibri, sans-serif; font-size: 11pt;"
class="">Croatia, HRT:</span><br class="">
<a href="https://teletekst.hrt.hr/" class="" style="font-family:
Calibri, sans-serif; font-size: 11pt;" moz-do-not-send="true">https://teletekst.hrt.hr/</a><br
class="">
<span style="font-family: Calibri, sans-serif; font-size: 11pt;"
class=""> </span><br class="">
<span style="font-family: Calibri, sans-serif; font-size: 11pt;"
class="">Greece:</span><br class="">
<a href="https://www.greektvidents.com/Teletext_ERTEXT.shtml"
class="" style="font-family: Calibri, sans-serif; font-size:
11pt;" moz-do-not-send="true">https://www.greektvidents.com/Teletext_ERTEXT.shtml</a><br
class="">
<span style="font-family: Calibri, sans-serif; font-size: 11pt;"
class=""> </span><br class="">
<span style="font-family: Calibri, sans-serif; font-size: 11pt;"
class="">And more; I have not done a complete survey!</span><br
class="">
<span style="font-family: Calibri, sans-serif; font-size: 11pt;"
class=""> </span><br class="">
<span style="font-family: Calibri, sans-serif; font-size: 11pt;"
class="">There are also several apps for iOS and for Android
that display Teletext content from</span></div>
<div><span style="font-family: Calibri, sans-serif; font-size:
11pt;" class="">various (TV channel) providers.</span><br
class="">
<span style="font-family: Calibri, sans-serif; font-size: 11pt;"
class=""> </span><br class="">
<span style="font-family: Calibri, sans-serif; font-size: 11pt;"
class="">What the source format is for the Teletext pages as
produced today, I don't know. But I would</span></div>
<div><span style="font-family: Calibri, sans-serif; font-size:
11pt;" class="">guess</span> <span style="font-family:
Calibri, sans-serif; font-size: 11pt;" class="">that it is
likely "plain text" files, with Teletext specific markup, that
is then converted to</span><br class="">
<span style="font-family: Calibri, sans-serif; font-size: 11pt;"
class="">1) Teletext analog format, 2) Teletext DVB format, 3)
HTML. But that is just my guess.</span><br class="">
<span style="font-family: Calibri, sans-serif; font-size: 11pt;"
class=""> </span><br class="">
<span style="font-family: Calibri, sans-serif; font-size: 11pt;"
class="">Again note that Teletext is still commonly used for
optional subtitles. (DVB subtitles, a "bitmapped"</span><br
class="">
<span style="font-family: Calibri, sans-serif; font-size: 11pt;"
class="">format (i.e. the subtitles are sent as images, not
text) does not seem to be used much. At least, I</span><br
class="">
<span style="font-family: Calibri, sans-serif; font-size: 11pt;"
class="">haven't seen it.) This requires timing, which is not
part of the Teletext protocol, but must be in</span><br
class="">
<span style="font-family: Calibri, sans-serif; font-size: 11pt;"
class="">the source in order to control when a subtitle is
output as Teletext for optional display.</span><br class="">
<span style="font-family: Calibri, sans-serif; font-size: 11pt;"
class=""> </span><br class="">
<span style="font-family: Calibri, sans-serif; font-size: 11pt;"
class=""> </span><br class="">
<span style="font-family: Calibri, sans-serif; font-size: 11pt;"
class="">So</span> <br class="">
<span style="font-family: Calibri, sans-serif; font-size: 11pt;"
class=""> "But a teletext application for a modern computer
is not "normal use." It is reasonable</span><br class="">
<span style="font-family: Calibri, sans-serif; font-size: 11pt;"
class=""> for a non-standard application like this to
interpret characters from U+0000 to U+001F</span><br class="">
<span style="font-family: Calibri, sans-serif; font-size: 11pt;"
class=""> as the corresponding ISO 646 characters would be
in teletext."</span><br class="">
<span style="font-family: Calibri, sans-serif; font-size: 11pt;"
class="">is very false.</span><br class="">
<span style="font-family: Calibri, sans-serif; font-size: 11pt;"
class=""> </span><br class="">
<span style="font-family: Calibri, sans-serif; font-size: 11pt;"
class="">Further, the "object" overrides in the Teletext
*protocol*, in several levels, "objects"</span><br class="">
<span style="font-family: Calibri, sans-serif; font-size: 11pt;"
class="">prioritized depending on "implementation level", can
specify:</span><br class="">
<span style="font-family: Calibri, sans-serif; font-size: 11pt;"
class="">1) Bold, italic, underline, proportional font.</span><br
class="">
<font class="" face="Calibri, sans-serif"><span
style="font-size: 11pt;" class="">2) More colours (but only
16 levels per red/green/blue, no </span><span
style="font-size: 14.666666984558105px;" class="">transparency</span><span
style="font-size: 11pt;" class=""> though).</span></font><br
class="">
<span style="font-family: Calibri, sans-serif; font-size: 11pt;"
class="">3) Character substitutions (likely replacing spaces)
to be able to display characters from "G3".</span><br class="">
<span style="font-family: Calibri, sans-serif; font-size: 11pt;"
class="">These cannot be handled by "retaining" the
ill-designed control codes of Teletext anyway.</span><br
class="">
<span style="font-family: Calibri, sans-serif; font-size: 11pt;"
class=""> </span></div>
<div><span style="font-family: Calibri, sans-serif; font-size:
11pt;" class=""><br class="">
</span></div>
<div><font class="" face="Calibri, sans-serif"><span
style="font-size: 11pt;" class="">Have an </span><span
style="font-size: 14.666666984558105px;" class="">urge</span><span
style="font-size: 11pt;" class=""> to edit your own Teletext
pages? Here</span><span style="font-size:
14.666666984558105px;" class="">’</span><span
style="font-size: 11pt;" class="">s the web page for doing
just that:</span></font></div>
<div><font class="" face="Calibri, sans-serif"><span
style="font-size: 11pt;" class=""><br class="">
</span></font></div>
<div><font class="" face="Calibri, sans-serif"><span
style="font-size: 14.666666984558105px;" class=""><a
href="https://zxnet.co.uk/teletext/editor" class=""
moz-do-not-send="true">https://zxnet.co.uk/teletext/editor</a></span></font></div>
<div><font class="" face="Calibri, sans-serif"><span
style="font-size: 14.666666984558105px;" class=""><br
class="">
</span></font></div>
<div><font class="" face="Calibri, sans-serif"><span
style="font-size: 14.666666984558105px;" class="">You can
save your page in a handful of formats (plus as image). I
haven’t analyzed these formats,</span></font></div>
<div><font class="" face="Calibri, sans-serif"><span
style="font-size: 14.666666984558105px;" class="">but
presumably they are storage formats actually used for ”real”
Teletext pages that are converted</span></font></div>
<div><font class="" face="Calibri, sans-serif"><span
style="font-size: 14.666666984558105px;" class="">to be
transmitted (”analog” (outdated) or DVB) or given as web
pages (HTML, but no ”separated</span></font></div>
<div><font class="" face="Calibri, sans-serif"><span
style="font-size: 14.666666984558105px;" class="">mosaic”
characters, since they are not yet allocated in Unicode;
could use small images though...).</span></font></div>
<div><font class="" face="Calibri, sans-serif"><span
style="font-size: 14.666666984558105px;" class=""><br
class="">
</span></font></div>
<div><font class="" face="Calibri, sans-serif"><span
style="font-size: 14.666666984558105px;" class="">/Kent K</span></font></div>
<div><font class="" face="Calibri, sans-serif"><span
style="font-size: 14.666666984558105px;" class=""><br
class="">
</span></font></div>
</blockquote>
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