[linux-dvb] DVB-S2 and other (new) modulation standards
js at linuxtv.org
Wed Nov 23 18:45:09 CET 2005
On Wed, Nov 23, 2005, Steve Toth wrote:
> >>>Of course the current method used to distinguish the device
> >>>types in VDR (FE_QPSK = DVB-S, FE_QAM = DVB-C and FE_OFDM = DVB-T)
> >>>wouldn't work any more, so other criteria might be necessary.
> >>>But basically a DVB-S device would be just one single device
> >>>(with only one single frontend), whether it can only do the
> >>>"old" DVB-S, or both DVB-S and DVB-S2.
> >>>At least that's how I would hope this would behave in the future.
> >>afaik dvb-s2 is backwards compatible to dvb-s
> For what it's worth, on the multiple frontend issue (not s2 related)...
> A board will appear with some or all of the following features before
> you know it. Analogue PAL, DVB-T and DVB-S on a single bridge.
> Personally, it's more logical to me two have two different frontends,
> one for S and one for T. Anything else feels like a hack.
Think of a frontend as a device which outputs an MPEG-2 TS.
The number of TSs you can receive simultaneously determines
the number of frontend devices.
> Analogue tends to take care of itself through v4l, this probably should
> change longer term.
Analog and digital TV with one tuner is not optimally integrated, but
I don't think you should replace v4l with something else because of this.
There isn't that much left to do.
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