[linux-dvb] Re: ATSC/DTV question

[Keith Craigie <kcraigie@mediabolic.com>]

Well probably the first course of action is to actually work on supporting
an ATSC-compliant DTV receiver board for Linux.  As there don't seem to be
any on the market - we're probably going to port Broadlogic's DTA-100
driver ourselves.

Our goal is to be able to receive the data IP packets from the
transmission, muxed in with the standard DTV video, and route them to a
LAN - and thereafter extract the contained data on the client machines.
>From what I understand, this simply involved demuxing the MPEG TS and
feeding it to a perhaps modified Linux TCP stack?  Is there support for
this in the current version of the DVB software?

Keith

On Fri, 19 Jan 2001 Rod.Walsh@nokia.com wrote:

> ATSC uses VSB8 modulation so you'll need a new tuning driver (just the same
> for DVB-T which uses OFDM+QAM/QPSK) - note DVB-S which uses QPSK.
> (Practically this is compiling with new or improved frontend.c and .h)
>
> Some of the DVB and ATSC SI tables are common (because they are both based
> on MPEG TS) and some are different so here's another place for work (VDR
> guys?).
>
> I am not an ATSC expert so I can't tell you exactly how ATSC encapsulates
> IP, but I guess you'll be needing modifications to demux.h and more
> significant ones to demux.c (as you might expect).
>
> Naturally, it would be great if the same API handled all DTV methods (anyone
> interested in the Japanese system?) so thanks to those who want this
> challenge.
>
> Good luck!!!
> Rod.
>
> PS For those confused: ATSC is the North American 'equivalent' for DVB-T.
> DVB-T is the terrestrial (i.e. standard antenna) version of DVB - the rest
> you can work out for fun :)
>
>
> > -----Original Message-----
> > From: ext Ralph Metzler [mailto:rjkm@convergence.de]
> > Sent: 19 January, 2001 4:43
> > To: Keith Craigie
> > Cc: linux-dvb@linuxtv.org
> > Subject: [linux-dvb] ATSC/DTV question
> >
> >
> > Keith Craigie writes:
> >  > Hi there,
> >  >
> >  > Now I know this is the DVB mailing-list ... but now that
> > ATSC is more
> >  > available, is there plans to start a parallel project on
> > linuxtv for
> >  > supporting the American standard?  Also, if anyone knows
> > any links to
> >  > projects/mailing lists for ATSC, I'd appreciate their
> > passing them on.
> >
> > According to the ATSC specs, it looks similar enough to DVB
> > that a lot of
> > the DVB software can be reused for ATSC.
> > There are some differences in the hardware as well as the
> > specifications
> > for service information. But I see no reason why the DVB API we are
> > using for our driver could not be used for ATSC as well.
> > I would welcome any discussion on this.
> >
> > Ralph
> >
> >
> > ---
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> >
>
>
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