[linux-dvb] Re: constructing DVB-T transport stream from DVB-Sreceived streams

[h162@ied.com]

  Thanks Robert, I'll read up ... yeah, I'll have to rebuild 
the tables ...

    John

On Fri, 22 Oct 2004, Robert Schlabbach wrote:

> Date: Fri, 22 Oct 2004 10:59:44 +0200
> From: Robert Schlabbach <robert_s@gmx.net>
> To: linux-dvb@linuxtv.org
> Subject: [linux-dvb] Re: constructing DVB-T transport stream from DVB-S
>     received streams
> 
> From: <h162@ied.com>
> >   I was wondering whether anyone here could advise of a
> > strategy on how to create DVB-T TS (namely how to construct
> > program tables, network tables and what other control tables
> > there are in DVB-T), from a set of received channels from a
> > few DVB-S cards, so that standards-compliant DVB-T receivers
> > could play channels out of the box.
> 
> Just converting between DVB flavors is as simple as it gets: You only have
> to replace the NIT. Exchange e.g. the
> satellite_delivery_system_descriptor() with a
> terrestrial_delivery_system_descriptor(). That's all there is to it when it
> comes to converting between DVB flavors.
> 
> *HOWEVER* you will probably also have to adjust to bandwidth limitations,
> i.e. only take a _subset_ of the services received from e.g. satellite and
> feed them to DVB-T. In that case, you will have to rebuild the PAT, PMT and
> SDT, and possibly have to modify the video stream - but all this has
> nothing to do with the DVB-S vs DVB-T conversion anymore, and is mostly
> concerned with MPEG-2, but not with DVB (only the SDT is DVB).
> 
> >   Is there a spec for DVB-T control tables ?
> 
> Download ETSI EN 300 468 from http://www.etsi.org - it contains the
> specifications for the DVB NIT and the DVB SDT. As to PAT, PMT and MPEG-2
> video, you'll have to get ISO/IEC 13818-1 and ISO/IEC 13818-2 for that,
> respectively.
> 
> Regards,
> --
> Robert Schlabbach
> e-mail: robert_s@gmx.net
> Berlin, Germany
> 
> 
>