On Mon, Oct 15, 2007, Manu Abraham wrote: > Johannes Stezenbach wrote: > > > > I'm very confident the output of the demod is a single TS in all > > cases, and this has nothing to do with the demux. > > Maybe, not very sure on that. Also the specifications additionally adds this: > > 5.2 SDTV and HDTV broadcasting with differentiated channel protection > > The DVB-S2 system may deliver broadcasting services over multiple Transport > Streams, > providing differentiated error protection per multiplex (VCM mode) (see > note). A typical > application is broadcasting of a highly protected multiplex for SDTV, and of > a less > protected multiplex for HDTV. Figure 17 shows an example configuration at the > transmitting > side. Assuming to transmit 27,5 Mbaud and to use 8PSK 3/4 and QPSK 2/3, 40 > Mbit/s > would be available for two HDTV programmes and 12 Mbit/s for two-three SDTV > programmes.
That doesn't contradict what I said at all. E.g. the HDTV TS is packaged with ISI 0x23 and the SDTV has ISI 0x42. The ISI for each TS is in the EN 300 468 S2 delivery desc. When receiption conditions are good you can receive both TSs, when they are bad you can only receive the SDTV TS (the HDTV one will have too many errors). In all cases the output of the demod is a single TS. Johannes _______________________________________________ linux-dvb mailing list linux-dvb@linuxtv.org http://www.linuxtv.org/cgi-bin/mailman/listinfo/linux-dvb
