Apologies for jumping in the middle of a discussion, but just thought I'd throw in my 2c re some of the 2170P-3 edge controls, since I've been experimenting with these the last few days. This is still sort of a work in progress, so editing / retractions / updates (without notice) are likely, if not certain.
Some of the controls seem to operate with finer granularity depending on which SYSM setting is used, so I've broken them down into two categories based on that.
All of these controls seem to have their strongest effect in a horizontal direction and little or no effect in a vertical direction, so their behavior is usually easiest to see on vertical edges. And when I refer to "vertical edges" or "horizontal detail" below, I'm really talking about the same thing.
All of these observations were made using patterns/video content at 480p (input at 33.75khz) via DVI on a 34XBR800.
NOT (OR DOESN'T APPEAR TO BE) SYSM-SENSITIVE
SYSM-SENSITIVE


Some of the controls seem to operate with finer granularity depending on which SYSM setting is used, so I've broken them down into two categories based on that.
All of these controls seem to have their strongest effect in a horizontal direction and little or no effect in a vertical direction, so their behavior is usually easiest to see on vertical edges. And when I refer to "vertical edges" or "horizontal detail" below, I'm really talking about the same thing.
All of these observations were made using patterns/video content at 480p (input at 33.75khz) via DVI on a 34XBR800.
NOT (OR DOESN'T APPEAR TO BE) SYSM-SENSITIVE
- SHF0 seems to change the "frequency" of sharpening in the image, creating a subtle "loosening" or "tightening" effect on horizontal details. 0=loose. 1=tight. It's easiest to see the effect with Sharpness raised on a pattern like this with SYSM=1. Though you can also sense the tightening/loosening effect in video content at nominal Sharpness as well. I don't think this control "scales" with SYSM, but it does effect the character of edge-distortions (ie ringing/overshoot) with each SYSM setting.
- PROV is also easiest to initially see with Sharpness elevated. And seems to shift the "emphasis" to either the left or right of the edge in small increments. Like SHF0, the effect of this control is pretty subtle at nominal Sharpness settings, but it can be perceived as sort of pulling your eye towards either the left or right side of the screen. So it may have some value in achieving better "equilibrium" in the picture.
PROV may need to be tweaked differently depending on how SYSM and other controls are configured. Although it's easier to see the behavior of this control at higher Sharpness settings, I seem to get more reliable results adjusting it at nominal Sharpness, based on the way it seems to pull my eye toward either the left or right of the screen.
- LTLV functions differently depending on how LTMD is configured.
If LTMD=0, then LTLV seems to smooth out details that are similar in brightness/color, while sharpening those that are aren't. So you may be able to think of it as sort of a combination low-con noise-reducer/hi-con edge-enhancer. It particularly seems to reduce "noise" (and maybe also some clarity) in darker areas of the image, ie shadow detail.
If LTMD=1, then LTLV seems to have a more generalized sharpening effect, basically reducing softness in the picture across the board, including shadow detail. This could be useful for enhancing shadow detail on 480p sources with SYSM=1. Whether it would be beneficial with the other SYSM settings, I don't really know yet. Preliminarily it looks like it might perhaps be a little heavy-handed with SYSM=2.
To see any effect from the two LTMD settings, LTLV has to be higher than 0 (ie between 1 and 3). LTLV=3 has the strongest effect. And the behavior of these controls is probably seen most easily at nominal Sharpness probably with SYSM=1. You can probably get a better feel for the difference between the two LTMD settings if you set LTLV to 3, and then flip back and forth between LTMD=0 and LTMD=1 while watching something with a pretty good level of detail like AOTC.
SYSM-SENSITIVE
- F1LV seems to better define vertical edges, by boosting brightness on the lighter side(s) of the edge. Its effect can be seen fairly easily on patterns of fine dark detail or text against a lighter background, with Sharpness at nominal settings. This control is sensitive to how SYSM is set (ie it seems to operate at higher frequency/smaller granularity with SYSM=2/3), and it's easiest to see it's effect with SYSM=1.
Although this does increase "noise" in the picture (especially at SYSM=1), it may have some "defining" value in terms enhancing shadow details, especially at the higher granulity with SYSM=2/3.
- CTLV seems to control the saturation of color on fine horizontal detail where two different colors meet. You can see the effect fairly well on the attached CTLV patterns with SYSM=1 at nominal Sharpness. With SYSM=2/3, CTLV seems to operate at a higher frequency/smaller granularity (watch the thinnest lines in the CTLV1.JPG pattern with SYSM=2/3).



















....So i can't really keep it.



