[linux-dvb] [PATCH] 8PSK/BPSK DVB-S/S2 support

Johannes Stezenbach js at linuxtv.org
Sat Feb 25 01:37:33 CET 2006


On Fri, Feb 24, 2006, Alan Nisota wrote:
> On 2/21/06, Jake wrote:
> > What about DSS modulation support ?
> > Twinhan boards already support it and DST frontend setup need just one
> > bit changed to switch between QPSK and DSS mode ...
> The genpix board I'm using supposedly can support DSS as well (The
> broadcom chip it uses supposedly supports it).  I can set it to 'DSS'
> mode, but don't know what it would take to actually get it to start
> transmitting data.  As i don't have an available stream, I can't
> really comment further.

I don't know why you ignored Manu's reply. AFAIK DSS does not
just use a different modulation scheme. More importantly,
it doesn't use MPEG-2 transport streams, which means that
the dvb-core software demux and the demux API don't apply.
IOW, although it is a digital TV "standard", it has nothing to
do with DVB or ATSC.
http://www.coolstf.com/mpeg/index.html#dss

If someone can show that there is a neat way to add DSS
support to dvb-core I'm not against adding it, but please
don't start by pushing random bits into the frontend
API which are totally useless by itself.


Johannes



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