[linux-dvb] dvb-h demodulator commercially available and supported by linux driver?!

Andrea Venturi a.venturi at cineca.it
Fri Nov 11 18:52:02 CET 2005


Patrick Boettcher ha scritto:
> Hi,
> 
> Andrea Venturi wrote:
> 
>>> The DiB7000 was at first just used for DVB-H and currently DiBcom is
>>> also using this demod for DVB-T devices (because power consumption is
>>> lower with this design and there is also the DiB7700 and DiB7710 which
>>> is demod and USB/PCI bridge in one chip - devices are really small).
>>
>>
>> so this kind of DVB-T card are not actually supported by the linux
>> driver?
> 
> 
> Yes. Afaik, the dib7000 is not register compatible with the dib3000, so
> there has to be another new demod-driver for that.
> 
>> anyway, are there DVB-T devices ALREADY on the market using DiB7000, in
>> the enanced 4K version, or they are just the old 2k-8k only version?
> 
> 
> Just for reference designs for OEMs I think. DVB-T won't use 4k FFT. As
> far as I can see from now, as soon as the first dib7000-device will hit
> the market, a linux-driver for that will be ready... - Problem then will
> be if the silicon-tuner-manufacturer wants to reveal information about
> that (see current problem with Microtune and their MT2060).
> 
>> do you have a dump of a complete TS of such a "DVB-H like" transmission?
> 
> 
> No, sorry.

i just see this presentation from t-systems about the berlin trial.

http://www.ipdc-forum.org/resources/documents/9-T-SystemsDVB-HPilotBerlin.pdf

in slide 6, they show the technical detail. it's a 8K

> 
>>> The main differences/additions (from memory):
>>>
>>> - every data transmitted with DVB-H is encapsulated in IPv6 MPE sections
>>> - a sophisticated RS FEC is used for error correction of the
>>> MPE-sections
>>> - 4k-mode
>>>
>>
>> yes, i read somewhere, and there's the sychronization stuff etc.., but i
>> was oversimplyfing just to give an idea
> 
> 
> Yeah, right, I forgot the time-slicing, which is used to save battery on
> devices. time-slicing was used for the test-signal in Berlin - so every
> 2 seconds I saw bursts of data coming in on different PIDs.
> 
> Patrick.
> 
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