Terry, "Nebulous"? Am I wrong about the HP to LP data ratio with E-VSB? Am I wrong about the demos at the 2000 NAB? For the modes used at the 2000 NAB demo, see: <http://www.dvb.org/documents/white-papers/WP01%20(DVB-T%20Hierarchical).pdf > Modulation: 64 QAM/QPSK Guard Interval 1/32 LP code rate 3/4 HP code rate 1/2 LP bit rate 13.6 Mbps HP bit rate 4.5 Mbps LP Gaussian noise performance 19.6 dB SD Gaussian noise performance 10 dB (this number is on the document I point to on the link above, but was not on the original March 2000 document which I still have.) However, it is a moot point, Terry, as E-VSB is as dead in the United States as DVB-T is no matter how well it may perform. Cheers, John Shutt ----- Original Message ----- From: "Terry Harvey" <tjharvey@xxxxxxx> To: <opendtv@xxxxxxxxxxxxx>; <opendtv@xxxxxxxxxxxxx> Sent: Saturday, April 10, 2004 2:24 AM Subject: [opendtv] Re: PR: Enhanced AC-3 Audio Specifications Serve Multiple Applications > 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 ---------------------------------------------------------------------- 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.