[linux-dvb] Possible patch for CAM/CI issues

Ralph Metzler rjkm at metzlerbros.de
Tue Nov 8 00:25:23 CET 2005


irk writes:
 > From: "Andrew de Quincey" <adq_dvb at lidskialf.net>
 > 
 > >> I wonder if it would be possible to simple have some form of 
 > >> retransmission
 > >> at the application level... I'll have a look at en50221.
 > > Hmm, I've had a look. Unfortunately, even though the CAM control protocol 
 > > is
 > > massively overdesigned for what is needed, it doesn't seem to provide any
 > > support for error detection or retransmission of corrupt messages!! :(
 > 
 > 
 > So again the question posed before: How the set-top folks do this that there 
 > are no
 > visible problems?

I had similar problems with a Nokia receiver and Irdeto CAMs a few
years ago. One worked fine and the other had artifacts like you
described. So, the "set-top folks" don't always manage it to work with
all CAMs either.


Ralph



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