Bob Miller wrote: > But COFDM DVB-T was more robust at a higher bit rate > than possible with 8-VSB in 2000 as demonstrated by > Sinclair at the Hearings. 19.76 Mbps with a mobile > antenna while 8-VSB was only up to 19.34 Mbps in a > fixed position with a directional antenna. First of all, more recent comparison tests do not paint this picture across the board, and even these more recent tests are a couple of years old or more. You keep harking back to 1999, which of course is pointless. I refer you back to the CRC comparison tests documented in the September 2003 issue of IEEE Transactions on Broadcasting, and then keep in mind what 8-VSB receivers have done since then when you read their results. This was the test where they added in the effect of on-channel repeaters. But they also did a comparison before introducing the OCRs. I also refer you to the numbers documented in FCC 05-199 we saw yesterday, which are pretty hard for COFDM at 3.3 b/s/Hz (aside from echo tolerance). And to the numbers recommended in A/74 vs Nordig. But without getting bogged down in this incessant debate, the simple fact remains that the significant effort in 8-VSB is going to maintain a high spectral efficiency while increasing robustness. That's the real push, not E8VSB. Instead, in France and the UK, they are doing whatever it takes to get up to somewhere close to 3.3 b/s/Hz, in order to support HD. Their main handicap is the low power they want to transmit. So the inflexibility of 8-VSB is not an issue. Because reducing the bit rate to increase robustness is not where the world of TV broadcasting seems to be going. 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.