John, Your comparison between DVB-hierarchal modulation and E-VSB is nebulous. You have no quantitative data to support your assertion. I recall the NAB demonstration. I was impressed but show me the direct C/N ratio, BERs and bandwidths employed for a direct comparison. I suspect that you will find that E-VSB is more robust under the comparison you describe. Terry Harvey ---------------------------------------------------------------- At 04:18 PM 4/8/2004 -0400, John Shutt wrote: >I also equate E-VSB to DVB-T HM, but in concept only. ATSC takes a bigger >hit in the high capacity bitstream to provide the robust stream than DVB-T >HM does. > >For every Mbps of robust in ATSC, you subtract 2 Mbps from the standard >stream. So for 4 Mbps of robust ATSC you get 11 Mbps of standard stream. > >For DVB-T, the mode that was demonstrated in Las Vegas (almost exactly) 4 >years ago at NAB 2000 had 13.6 Mbps in the LP stream and 4.5 Mbps in the HP >stream. > >John Shutt > >----- Original Message ----- >From: "Manfredi, Albert E" <albert.e.manfredi@xxxxxxxxxx> >To: <opendtv@xxxxxxxxxxxxx> > > I equate E-VSB to hierarchical mode in DVB-T. For DTT, the > > price you pay in payload reduction is apparently not worth > > it to real operators. > > > > Bert > > > >---------------------------------------------------------------------- >You can UNSUBSCRIBE from the OpenDTV list in two ways: > >- Using the UNSUBSCRIBE command in your user configuration settings at >FreeLists.org > >- By sending a message to: opendtv-request@xxxxxxxxxxxxx with the word >unsubscribe in the subject line. ---------------------------------------------------------------------- You can UNSUBSCRIBE from the OpenDTV list in two ways: - Using the UNSUBSCRIBE command in your user configuration settings at FreeLists.org - By sending a message to: opendtv-request@xxxxxxxxxxxxx with the word unsubscribe in the subject line.