[linux-dvb] Re: wanting to contribute dvb-t tuning informationbut small problem with scan

[Johannes Stezenbach <js@convergence.de>]

Robert Schlabbach wrote:
> From: "Christoph Burger-Scheidlin" <c.burger-scheidlin@iu-bremen.de>
> > In fact I can only see 15 channels. 4 channels are discovered
> > twice with slightly different settings in channels.conf, differing
> > in the second FEC value.
> 
> I'd say this is a bug in the SI parser. ETSI EN 300 468 says that in the
> terrestrial_delivery_system_descriptor(), the second FEC bits shall be
> '000' for non-hierarchial channel coding (i.e. then the second FEC is not
> used). However '000' means FEC 1/2 _if_ it is used. So the SI parser needs
> to check whether a broadcast is non-hierarchial and then use "FEC_NONE" as
> the second FEC value instead of whatever value the 3 bits assigned to it
> would mean.

The SI parser is correct, I believe the FEC_NONEs came from the
initial tuning data.

Johannes