[linux-dvb] Re: What is happening on Astra 11837 h, PID 18?

[Johannes Stezenbach <js@linuxtv.org>]

Josef Wolf wrote:
> I am trying to parse the EIT that is sent on Astra Hor 11837MHz in PID 18.
> This is the transponder where the ARD channel is located.
...
>     574	pid:18 tid:080 ext:28106 snr:248 cnt:249 vers:47
...
> This says that version 47 of table_id=80, table_id_extension=28106 consists
> of 249 sections.  Sections 8,16,24,32 and so on were sent 574 times. But
> sections which can not be divided by 8 were not sent at all (section
> 89 is an exception here)
> 
> That is, every 8'th section of this table is transmitted over and over
> again.  But the other sections of this table are never sent.  So there
> is simply no way to cnstruct this table because most of the sections are
> simply missing.  Same thing happens for the other programs on this
> transponter.  Tables 80, 81, 96 and 97 are transmitted in this manner for
> all the channels on this transponder.
> 
> Any ideas what is going on here?  Why do I never see sections 1..7,9..15
> and so on?

The EIT is sliced up in segments. Read the chapter on "EIT Schedule
structure" in ETSI ETR-211.

Johannes