Quote:
Originally Posted by rixrex
Lots of sets on the market with less than desirable built-in enhancers and/or de-interlacers, etc, and the same is true of players that do such.
|
Yep, that's why we talk about the de-interlacing capabilities of DVD players and TVs so we can best know how to "mate" them, so to speak.
That's also why the Panasonic DVD-RP82 and DVD-XP30 (and related) DVD players were so popular, they offered de-interlacing capability most HDTVs on the market just couldn't match, with the exception of a Pioneer Elite CRT RPTV, I believe.
Quote:
|
For example, an enhancer taking original SD-DVD image of 480 lines could simply repeat a set number of lines to enhance to 720 or 1080, and so it could play on 720 or 1080, but look like it was "zoomed" or "blown up". A quality enhancer actually compares the frame by frame images for motion, and also the line by line images, and then creates the additional inserted image lines based upon how they would actually appear.
|
A cadence reading de-interlacer does this, but a flag reader doesn't. That's another reason why the Panasonic players I mentioned above were so "hot" (back then), they were (are) cadence readers and as such didn't "suffer" from bad flags, as flag reading de-interlacers do or can.
Quote:
|
I'm not surprised to hear about artifacting effects with 1080i that are gone in 720p. You have 1080 lines total, but that's 540 odd and even alternating, each 30x per second, whereas 720p is 720 lines at 60x per second. The math shows 720p to be preferable for smooth imagery. I'd bet those effects have more to do with the alternating fields than any actual DVD artifacting.
|
I'm not talking about "DVD artifacting" but combing and other artifacts as a result of de-interlacing. Considering the HDTV in question has a native resolution of 1080p, it's taking the 1080i input (from either the DVD player or the cable box) and de-interlacing it to 1080p. In the case of a 720p signal, it's got to upscale that to 1080 and maybe de-interlace that if it converted to 1080i first (not sure what this TV actually does when going from 720p to 1080p). If the de-interlacing of 1080i by the TV was as good as one would hope, I wouldn't expect to see what I did, namely combing.
Peace...