Manfredi, Albert E wrote: >Barry Wilkins wrote: > > > >>Kon, >>Exactly why then is HDTV being pushed in the USA? Especially >>when it has such an inflexible DTTV transmission arrangement. >> >> > >My answer is that the sale of "flat panel" televisions, which >accounts for a healthy percentage of TV sales now, >simultaneously increases people's awareness of image quality. >People may not be screaming for the best possible HD, as Doug >does, but they are demanding more than SD or sub-SD quality. > >I don't think DBS can compete unless it accommodates these new >flat panel owners. > >When Dish and DirecTV wanted to merge, one of the arguments >they used was the spectrum needed for local into local and HD, >IIRC. It didn't fly, but at least it does show that they're >well aware of the spectrum crunch they face. > >Not to say there won't be a constant battle between more >channels and decent quality. I just think the sweet spot has >moved toward better quality in each channel. Cable can provide >more b/s per channel. > >As to "inflexible" DTT arrangement, as inflexible as it is, it >does favor HD. Because the inflexibility of 8-VSB is toward the >high end of the spectrum efficiency curve, not the other way >around. > >The effort in 8-VSB is to make the scheme as robust as possible >while not reducing the b/s per channel. Conversely, the effort >in Euro COFDM plants is to increase the spectrum efficiency in >order to accommodate HDTV. > >Bert > 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. Bob Miller ---------------------------------------------------------------------- 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.