Richard Hollandsworth wrote: > Many 1080i sets look as good as a 1080p set because they deinterlace in= to a picture buffer and then read it out at much higher than 30 fps, jus= t like a computer monitor can spit out the same image at 60, 72, 75 Hz, e= tc. > Note VirtualHD 1080p processing in my 2003 Hitachi 42-inch Plasma, whic= h is capable of 1280x1024@75 fps on the VGA port (see attached brocure). >=20 On a PC, once you have progressive frames in a buffer you can easily=20 output at any frame rate the video card supports, without any special=20 logic at all as long as you don't need any sort of "Natural Motion"=20 interpolation. We did this in the open source DScaler project for=20 instance, where 72 Hz was popular. But the hard part is getting progressive frames in a buffer when the=20 source is truly interlaced. Then it's a quality contest between=20 upscaled 60p frames vs the constructed frames created from 30i. And it=20 gets even more interesting when you have mixed material constantly=20 switching back and forth between interlaced and telecined material. I think interlaced material gets its advantage by allowing a little=20 vertical aliasing, sending material with more than 540 vertical pixels=20 of resolution. The human visual system can resolve some of the=20 ambiguity caused by this aliasing and we are politely willing to=20 overlook a small amount of artifacts in order to get the extra detail. I keep expecting this equation to change as we all start getting 1080p=20 displays since one of the driving forces to interlaced format will=20 disappear. So I still expect interlaced delivery to also eventually=20 disappear. But, for whatever reasons, my poll didn't support all this=20 conjecture yet. I believe Mark's explanation was likely on track there. If I thought there would have been enough respondents I would have had=20 the poll ask only about live sports broadcasts which seem to be all from = 30i or 60p video cameras. - Tom > PS: Sears has the similiar Hitachi 42HDM12 Monitor (Alis 1024x1024) on = sale for $1,979: > http://www.sears.com/sr/javasr/product.do?BV_UseBVCookie=3DYes&vertical= =3DELEC&pid=3D05775725000&subcat=3D38+to+51+inch+TVs >=20 > <holl_ands> >=20 > =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D > Tom Barry <trbarry@xxxxxxxxxxx> wrote:=20 >=20 > Manfredi, Albert E wrote: >=20 >>Mark Schubin wrote: >> >> >> >>> - This story from Connected Home Media I liked for one >>>of the headlines. Did you know 2006 will be "The Year of >>>HDTV"? >>> >> >> >>I think what the paragraph actually describes is the year of >>1080p. Which The Perfect Vision is also claiming. In which >>case, the interesting question (IMO) would be what looks >>better on a 1080 at 60p display? 720p upconverted, or 1080i >>deinterlaced? >=20 >=20 > I'm running an AVS poll on that very subject right now for those that=20 > recently got a 1080p display for Xmas, or wherever. The results=20 > strongly suggest (against my expectations) that deinterlaced 1080i is=20 > superior. Though the number of respondents is still small (30 with a=20 > 1080p display). See: >=20 >=20 >=20 > It is always a mystery to me why 1080i continues to do so well but it=20 > often looks better to me too. But I don't have a 1080p display yet. >=20 > - Tom >=20 >=20 >=20 >=20 > =09 > --------------------------------- > Yahoo! Photos =96 Showcase holiday pictures in hardcover > Photo Books. You design it and we=92ll bind it! >=20 >=20 > -- Binary/unsupported file stripped by Ecartis -- > -- Type: application/pdf > -- File: Hitachi 42HDT50 SpecSheet incl VirtualHD 1080p Proc.pdf > -- Desc: 3527817690-Hitachi 42HDT50 SpecSheet incl VirtualHD 1080p Proc= =2Epdf >=20 >=20 > =20 > =20 > ---------------------------------------------------------------------- > You can UNSUBSCRIBE from the OpenDTV list in two ways: >=20 > - Using the UNSUBSCRIBE command in your user configuration settings at = FreeLists.org=20 >=20 > - By sending a message to: opendtv-request@xxxxxxxxxxxxx with the word = unsubscribe in the subject line. >=20 >=20 ---------------------------------------------------------------------- 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.