[linux-dvb] Re: QAM Satellite Feeds

[Johannes Stezenbach <js@convergence.de>]

On Fri, Nov 22, 2002 at 02:57:58PM -0500, Salvatore Domenick Desiano wrote:
> I had thought that DVB-S was capable of time-division multiplexing on a
> single signal, whereas DVB-C was not. Which would mean that the DVB-C in
> the Motorola box is doing something odd to demultiplex the QPSK-QAM
> translated signal that another DVB-C might not know to do. And then
> there's the question of when the CAM is accessed... Any insight?

DVB always uses MPEG2 transport streams. In a cable network it is common
to keep the channel mapping of the analog system, e.g. 6 MHz per
channel. One channel carries one MPEG2 TS (usually with QAM64 or
QAM256 modulation), which can contain 3..5 programs.

Details about DVB-C/S can be found at http://www.dvb.org/ (list of the relevant
standards) and http://www.etsi.org/ (download of standard documents
by document number).


Regards,
Johannes


-- 
Info:
To unsubscribe send a mail to listar@linuxtv.org with "unsubscribe linux-dvb" as subject.