Craig Birkmaier wrote: > Over the years, Bert has often cited articles by Doug Lung when we > discuss RF standards - the infamous 8VSB vs COFDM debate. > > So I expect Bert will find this three part series by Lung, on a what > would be required for broadcasters to transition to a new COFDM > broadcast standard, to be of interest. > > Lot's of interesting stuff here for further discussion, but the fact > that Lung is tackling this issue says volumes... BTW, certainly Doug has a point that use of COFDM would be better for mobile reception of TV than even ATSC-MH, but there is no reason at all to expect that the wireless ISPs would allow their blessed handsets to have the needed tuner anyway. And, users of handhelds, while they are on the run, don't really seem to want "by appointment" TV anyway. Another point: did you notice how mobile reception suffers when the COFDM mode goes to fewer subcarriers? Which means, a scheme optimized for mobility will not be optimized for static indoor reception. You actually lose some resistance to multipath if you want to support reception at freeway speeds. Not good for indoor reception with handheld devices, in other words. We already discussed this some time ago. Not that conducive to a single RF infrastructure for all wireless TV. Also, I just got the current issue of IEEE Communications Magazine, which features articles on LTE-Advanced Release 11. This is the one that includes a bunch of new features, included in which is the multicast-broadcast mode and the FDD and TDD modes. Which makes piggybacking on wireless ISP nets, by broadcasters, that much more feasible. (I would expect only very few streams "need" to be broadcast on the infrastructure at any given time. E.g. only two or three per market, for late-breaking news that really matters, or for that Superbowl event). Perhaps OTA station groups can seriously think about morphing into wireless ISPs, and also become TV OTT Internet sites. 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.