[linux-dvb] How to descramble?

Andreas Oberritter obi at linuxtv.org
Fri Oct 14 16:13:57 CEST 2005


Hello Henrik,

On Fri, 2005-10-14 at 13:52 +0200, Henrik Sjoberg wrote:
> If the PMT contains no CA descriptor on programme level and common CA
> descriptors on stream level, the stream level common CA descriptors are
> now moved to programme level.

This is wrong, because different ES PIDs can use different ECM PIDs.
Moving the CA descriptors to the program level destroys their
association to an ES PID.

I don't know whether any broadcasters use it, but the fact that stream
level CA descriptors exist proves that is is intended to make that
possible.

Regards,
Andreas




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