[vdr] Re: Sky Digibox vdr support (was: Composite / S-VHS input ?)

["Andy Coates" <andy@bribed.net>]

> >> Are you sure there is not a separate chip in it that 
> decodes MPEG and
> >> turns it into RGB/Composite?
> >> That chip's input signal should be MPEG2, right?
> >
> >This is Sky we're talking about - they'll have developed 
> some special 
> >everything-on-one-chip solution to thwarte attempts by 
> people like us :/
> 
> Of course that there are many different designs of DigiBoxes for Sky 
> digital :-).
> 
> Old ones have a (ST Microelectronics) ST20TP2 or ST20TP4 
> (Microprocessor) 
> and then a STI3520 (MPEG Audio / MPEG-2 Video Decoder), wich 
> are linked by
> a parallel bus, transporting ES; this decoder deliver digital 
> video, that 
> then is feed to a video encoder chip (Philips SAA7102, SAA7120, etc),
> which produce the the Composite Video, S-Video and RGB outputs.

Sounds about right.  From what a friend has said the ST20TP2 is the only
ship which outputs a *TS* to an ICAM chip for decryption, which IIRC
strips out all unwanted PIDs from the stream and passes it onto the
various output chips.

I'm working with a friend on creating a circuit board to take a feed off
these chips (after decoding) and send it to a DVB-SPI card for TS
processing.

The DVB-SPI card I saw was a Dektec DTA-122 (www.dektec.com - about 1100
Euros), and apparently they'll have linux drivers before the end of the
year.  Maybe a VDR plugin could be made for it :)

Andy.



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