[linux-dvb] Multiproto API/Driver Update

Uri Shkolnik urishk at yahoo.com
Thu Sep 18 21:11:02 CEST 2008




--- On Fri, 9/12/08, barry bouwsma <free_beer_for_all at yahoo.com> wrote:

> From: barry bouwsma <free_beer_for_all at yahoo.com>
> Subject: Re: [linux-dvb] Multiproto API/Driver Update
> To: "linux-dvb" <linux-dvb at linuxtv.org>, urishk at yahoo.com
> Date: Friday, September 12, 2008, 12:17 PM
> --- On Thu, 9/11/08, Uri Shkolnik <urishk at yahoo.com>
> wrote:
> 
> > > It is from my perspective in Europe that I write,
> > > 
> > I'm not so sure. As I see it, if it depends on
> number
> > of users DVB-H comes last after CMMB and ISDB-T.
> 
> Then let them add their support ;-P   I just discovered
> that
> I should be within reception range of a (subscription)
> DVB-H
> mux, though sticking a directional antenna out the window
> did
> not show any signal (but also not on other
> previously-received
> frequencies) -- but climbing a nearby hill should net me a
> useful signal, maybe two.
> 
> For DAB, a simple paperclip antenna will get me one
> ensemble,
> a second should be receivable as well, and perhaps with a
> good
> antenna, some others may appear.
> 
> So, I can test real-world broadcasts and get the actual
> hands-
> on experience I need to understand and be able to help --
> which is more than I can for the other missing standards,
> as
> I'm not so good with the theoretical...
> 
> 
> 
> > I know the TerraTec device you refer to, and
> theoretically
> > it can be used as DAB radio receiver. The current
> LinuxTV
> > lacks the code to support it.
> [...]
> > There is a open source module from Siano that enable
> DAB @
> > Linux.
> 
> Is this something I would be able to download?  (Feel free
> to
> mail me privately if you don't want it available to
> other
> developers, though they could certainly fit it into a
> suitable
> API much better than I could)
> 
> I've searched with g00gle but haven't found any
> source to
> download.  (And if drivers under Linux for the other modes
> (T-DMB, DVB-H) are available, they may help me to better
> understand those modes as well)
> 
> 
> >   The problem is that this module is not a part of DVB
> > and does not communicates with DVB in any way, but it
> uses
> > its own character devices in order to communicate with
> user
> > space applications. It may be converted of course to
> > something that uses DVB, and also be more generic.
> 
> There is another USB DAB device out there (apparently no
> longer available, and if so, at an `early-adopter'
> price)
> with kernel support.
> Perhaps there's some shared functionality that can be
> combined, somehow, and make easier possibly adding support
> for some of the small handful of other DAB-able devices.
> 
> 
> Anyway, if I'm able to start to play with my device and
> DAB
> under linux, that should keep me busy and quiet for some
> time
> 
> thanks,
> barry bouwsma

[ Sorry for the late response ]

Regarding DAB support -

In order to add full support for DAB ( / DAB+ / T-DMB / DAB-IP / any other ensemble based transmission) you need to have an ensemble parser. This is quite a problem since I'm not familiar with any such decent open source parser.  

Anyone?

Uri


      



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