On 11/10/06, Manfredi, Albert E <albert.e.manfredi@xxxxxxxxxx> wrote:
John Shutt wrote: > Bob had 5th gen LG boxes, using the same LG block that is in the > DirecTV boxes. Bob's problem was that those "5th generation" > chips didn't work nearly as well as the prototype "Cold Fusion" > 5th generation box that got both Mark Schubin and Sinclair so > darned excited two years ago. I know he tried some no-name clones with the 5th gen LG chip, and that those clones didn't do "as well as" the prototype. But that doesn't mean they are crap, either. We have all surmised the reason to be that they weren't using the better tuner designs. AND The 5th gen LG-based USB receivers for PCs have been reviewed by the trade press on several occasions, and they all do very well. I keep repeating, over and over, that reception of TV stations from 80 Km using only a (single) indoor antenna, reliably, from these LG 5th gen-based designs is nothing to sneeze at. AND The 5th gen LG do not measure as well as the Samsung Gemini in certain very key areas. AND The training techniques used in 5th gen sets can also be improved upon, at least as far as I know, even without changing anything in the bit stream. Put all of this together and it is ridiculous to think that the only way to get acceptable DTT here is to use only A-VSB. That's just the sort of annoying rhetoric certain politicians seem to crave. I try to ignore it and not respond to it. I try. A-VSB is instead comparable to either HM or to 16-QAM modes in COFDM. For example, tuning the spectral efficiency down gradually to increase robustness, using the SRS mode of A-VSB, is very similar to increasing FEC in COFDM, and even backing down to 16-QAM. Same gradual improvement in robustness. Yes, A-VSB can be used. No, it is not mandatory. And if you are after spectral efficiency, you want to minimize use of A-VSB. Bert Minimal use of both 8-VSB and A-VSB is recommended and most likely.
Bob Miller ---------------------------------------------------------------------- You can UNSUBSCRIBE from the OpenDTV list in two ways:- Using the UNSUBSCRIBE command in your user configuration settings at FreeLists.org
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