» Mon May 21, 2012 3:07 am
I posted about this in another thread so ill duplicate my post here for yall.
with larger screens you can start to see the limits of sorce resolution which nesecitates higher resolutions to acheve the same percieved sharpness as you had on a smaller screen. viewing distance also plays a big part in your perception of picture resolution. there is a neat calculator for deturmining proper seating distance based on screen size, source resolution,and your eyes ability to make out fine details here, http://myhometheater.homestead.com/viewingdistancecalculator.html
I have a 65 inch DLP and at that size most DVDs are unwatchable for me where as it was still fine on my smaller 42 inch set. As a video calibrator/ Home theater enthusiast, I can give you some advice but it will only take you so far and will likely not remedy your issues as I believe them to simply be the nature of the source material.
first thing to do with any tv is turn all enhancements off such as color corrections or contrast inhancements. turn it all off, no exeptions.
If you have a movie mode or cinema mode that may be the closest to d65 ( the proper color of gray) and you should think about leaving your set on one of these modes. if you have a thx mode that will probably get you closer than other modes to rec709(industry standard for High Definition).
sharpness should usualy be all the way down unless it causes the picture to be noticably blurry. in that case keep it at the default setting. most sets these days should be set to 0 or off. If you want to be sure you need a test pattern. If you want a realy good one for free look here. http://www.avsforum.com/avs-vb/showthread.php?t=948496
from here on I will assume you are using the AVSHD709 calibraition disc linked above. many other patterns sources will work as well but the can be quite a bit different and its up too you to relate them to what I am saying.
Basicaly, using the sharpness pattern and sitting up close to the screen, you will want to adjust sharpness up to a point where white halos start to apear around the black lines in the pattern. Once that happens turn the sharpness down until the halos just dissapear. that is the proper setting for your sharpness. another thing that can have an effect on fine detail is wheather or not your display has a 1:1 pixel relationship with 1080p content. if it dosnt you will see a moir pattern when viewing a 1080p resolution pattern. if its correct you should litteraly be able to count the pixels with shuch a pattern. if your nose is to the screen, of course. Some sets have settings to correct this and some do not.
black level can only be reliably set with a pattern conforming to what source material you want to display within the capabilities of your set. if your display can display PC black levels (0 -255) you will get the most from your games with less banding as they where made in a PC environment and are actualy designed to be displayed nativly in this mode. however, you will need to set the ps3 up to match this setting. in this case RGB Full range (HDMI) should be set to full
Most sets dont display PC level black so if your set is like most you will want to set RGB full range to Limited. The only way to know what your set can display is to test it with a video test pattern designed to set black to very fine level. the AVSHD709 test patterns I linked to earlier have just such a pattern. what you want to do is see if your Display can resolve all the gray bars in the black level pattern all the way down to 0 if it cant than its most likely only capable of video black.. you should at a minimum be able to see steps 16-235.
If you cant see steps 16 and higher with your brightness control all the way up you have a serious problem. eather you have a device such as a audio reciever /pre amp or other device connected in line between your ps3 and your TV that is crushing black or your TV is a complete turd and you should emediatly throw it out the window.
if you can adjust gamma on your set you should probably set it before doing the following steps. Set gamma to 2.2 if available as thats what games will likely be expecting. If you watch in pure darkness and your display has enough dynamic range you may be able to get away with a gamma of 2.4 Bluray Movies are actualy mostly mastered in studio on displays calibrated to 2.4 to match a CRT's natural gamma curve.
If your set can resolve all the way to 0 in the black level pattern than you will want to adjust black down until the 0 gray bar in the black level pattern just disapears. but the next gray bar above it is still visible. if your display cant resolve all the gray bars down to 0 than you will want to adjust your brightness so that all the gray bars from 16 and above are visible and all the gray bars below 16 are invisible. if you cant see gray bars 235-255 try turning super white on in your ps3. if that doesnt help turn it off and set RGB full Range to limited on your ps3 regardless of wheather or not you can resolve gray bars down to 0. You may loose detail near white such as suttle cloud details or wrinkles in white fabrics if you dont. keep in mind, while doing this that you should always set black level in the room lighting you normaly view your display in and from your normal seating distance. I hope I havent confused you too much yet. thers easier patterns available to set black level but they arent quite as refined.
to set contrast you will want to display a 100% white field pattern with contrast maxed. Now, in your normal viewing position and room lighting. stare at this pattern for a few minutes. Ask yourself, Are your eyes hurting or fatigued from the pattern being to bright? If so, turn it down until your answer is no. now that you have done this check for crushing in the whites. you should still be able to see gray bars 0-255 if RGB full Range is set to Full in the ps3. you should at least be able to see gray bars up to 235 if RGB full range is set to limited if you can see more than 235 thats OK. if you cant in aether of these cases turn contrast down untill all the bars are visible. while doing this keep an eye out for discoloration of the gray bars in near white. as you increase contrast some displays will cause the lighter gray bars to start to change color. mostly it will start to look pink. turn contrast down further until there is no discoloration if you happen to see this.
to set your color and tint controls you need a blue color filter. you may be able to get one from the THX website or as an alternative, Joe kane Productions has a realy cool 3 color filter included with there Digital Video Essentials Calibration disc.
With a patern designed for adjusting your color decoder (color / Tint) and while looking through your blue filter, adjust the color control until the blue and white colors squares look the same and match in intensity with flashing kept to a minimum. do the same for the cyan and magenta color squares using the tint control.
Adjust geometry using the appropriate patterns to make sure the picture is centered and unform, if possible.
To do anything more would require an expensive color meter, special software and alot of experience in adition to access to the relevent grayscale and color management system controls. most sets dont have a full suite of controls available to an end user so Ill just leave that for you to figure out on your own if you wish. if you want to take it to the next level visit Spectracal.com where they can get you started but be sure to check to be sure your set actualy can be calibrated properly befor plunking down the cash. also, this is something for obsessive compulsive types like myself as it will take along time and alot of work for what may be only marginal improvements.
The last and the most frustraiting thing about calibraiting a display for games is that many game developers couldnt care less about conforming to established video standardsor just dont have a clue. Unlike movies, games are all over the place with regard to what settings will look right. This is why you see those gamma / brightness settings in many game menus. this is slowly changing and with time hopfully this problem will become a thing of the past.