|Originally posted by Syzygy
My contention was and is that no consumer display device currently available has 1080 lines of actual resolution. I wonder what the best available resolution is right now -- both horizontal & vertical?
You might try what another member does: Borrow or rent a high-quality HDTV generator and test sets. He (LB) ran some horizontal resolution results two years back (his 12/05/00 post)
, provides one update in this current thread
, and might update his earlier performance data.
I've taken the continuing claim by my set manufacturer that it can display all of 1080i's 2 million-plus pixels with a grain of salt. While the RPTV set, a Philips 64PH9905 has 9-in. CRTs, they're electrostatically focused, which can't be adjusted to the needle-sharp beams of electromagnetically focused CRT models such as Sony's high-end, graphics-grade G90s. The set does seem to have the electronic bandwidth required, though, plus a lenticular screen with fine enough pitch (0.51 mm). LB, some time back here, recounts seeing one (or a similar Philips model) display 1500-1600 lines of horizontal resolution at a show.
So what can higher-end RPTVs or other sets display? IMO, you also have to ask what the signal source is. Recently, in "HDTV programs can't provide 1920 X 1080 because..."
, I outlined some limits on actually viewing original 1080iX1920 resolution because of filtering, compression (MPEG-2), and other factors. How test pattern signals translate into viewed on-screen resolutions, at least with display gear used for approving of the U.S. HDTV standard, is also shown. In addition to all these limitations, resolution measurements might differ if you inject a test signal almost directly into the display (component inputs) or feed a RF test signal into the HDTV tuner, bringing different filtering into the testing.
So, pending the arrival of HDTV DVD test discs, or easy access to high-end test gear, it appears few really can test the limits of their hardware. A pleasant surprise would be for CBS to turn one of its HDTV cameras on a HDTV test pattern during the upcoming Master's golf game. Better yet, as I've suggested before, networks should build a HDTV resolution test pattern into the HDTV-oriented graphics they periodically display before station breaks or as time-fillers. These could be the updated equivalent of the "Indian-Head" resolution charts for NTSC broadcasts, and while they might appear only briefly you could adapt to reading them after several viewings. -- John