Vielleicht interessiert das hier auch jemanden... (auch zu dpike3)
Von: Wim Dewijngaert
Gesendet: Dienstag, 21. September 2004 09:24
An: rolandmeier
Betreff: Requests TUXTXT
Roland,
I saw you modifed some stuff in TUXTXT. I have a very small request. As a
developer (and out of curiosity), I'd also like to browse through the
hidden pages in a teletext service (the hexadecimal pages). Is there a
setting in the configuration file, or a 'secret' button to enable this
functionality? This would be cool!
Another request is Level 2.5, but I guess that means a lot of work...
Wim
Von: Meier Roland (BBU)
Gesendet: Dienstag, 21. September 2004 11:47
An: 'Wim Dewijngaert'
Betreff: AW: Requests TUXTXT
That would be possible of course, but there are a few problems:
These pages contain the information for the TOP text, and in some cases probably for different kinds of packet data service (for which you would need special software anyway).
At least in the first case, probably also for other data transfer, the data is hamming-coded (1 byte for 1 nybble) like the header information (in case of TOP text different parts of it depending on the kind of page) and cannot be displayed like the text pages.
Data services would probably also use the lines below 25, which are currently not stored.
If you are interested in the decoded TOP text information, you can enable DEBUG_BTT and DEBUG_ADIP in tuxtxt.h, then the information is printed and can be read via a nullmodem cable (I have removed this code in the newest release, but you can copy the two functions from the release before).
One other alternative might be to save the data from these pages to separate files in /tmp, from where you could fetch them.
But trying to display the content wouldn't make much sense.
Regarding level 2.5 I already mentioned in the thread that it is hardly used any more (because only few can display it and it costs lots of valuable bandwidth) and probably wouldn't be worth the effort (but feel free to do it, if you want
--
Mit freundlichen Grüßen
Roland Meier
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(o o)
==ooO==U==Ooo==
Von: wim
Gesendet: Dienstag, 21. September 2004 12:04
An: Meier Roland (BBU)
Betreff: Re: AW: Requests TUXTXT
First, thanks for responding!
I haven't introduced myself, but I've been working as a teletext developer for several companies, including MTV. Teletext is a real passion, I have been watching the first teletext transmissions in the 70's with an external decoder box... can you imagine!
Now, concerning the hexadecimal pages. It is true that - in most cases - they contain info beyond line 25 or encoded info like TOP. But in some cases, they ARE real pages, used in interactive applications or a quiz. It would be great if you could show the contents of the hexadecimal pages, just as if it were ordinary pages. It's ok that for TOP and telesoftware pages the page would be full of rubbish, I just am curious to see what the teletext services have "hidden" in the hexadecimal pages. So that's why I requested a "secret" button to keep the hexadecimal pages in the buffer and browse through them as if it were normal pages. Cannot be difficult to do I guess...
About level 2.5: it IS used on not ten, but HUNDREDS of teletext stations. In Germany, ARTE has developed a very nice level 2.5 service. I don't know about the situation in your country, but in Belgium and Holland level 2.5 is used as well. All new television sets have a level 2.5 decoder over here. So yes, it WOULD be a magnificent addition. However, I don't have any experience in C. I've already talked about this with LazyT, and he said it would take some work and he had no time to do it. So please, think about it again... I can send you all technical docs if you want to.
Wim
Von: Meier Roland (BBU)
Gesendet: Dienstag, 21. September 2004 12:22
An: 'wim
Betreff: AW: AW: Requests TUXTXT
Oh, sorry for boring you with my first answer
OK, I think that wouldn't be too hard.
You can send me any information that might be useful. I will check what effort it would be and decide...