Tom Barry wrote: > I think interlaced material gets its advantage by > allowing a little vertical aliasing, sending material > with more than 540 vertical pixels of resolution. The > human visual system can resolve some of the ambiguity > caused by this aliasing and we are politely willing to > overlook a small amount of artifacts in order to get > the extra detail. That seems reasonable, and also the 1080i has more horizontal resolution than 720p, as Mark said. But in addition to this, I would expect that the type of material transmitted would also favor one or the other format, perhaps. Anything with significant amount of vertical motion might favor upconverted 720p. While material with horizontal motion primarily, even if fast, would favor deinterlaced 1080i. That's my guess. I'm not sure which network transmits which HD formats, but in my short time with a steady diet of HDTV, I have found that not all HDTV is created equal. The best HD material, from what I've seen so far, seems to be the David Letterman show and just about anything on the PBS HD subchannel. 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.