First off, you don’t need to be rude.
Second, I have read the first post; about four times.
According to the first post response time IS related to lag because the post talks about 17ms being about one frame and he states that if your TV?s response time is 8ms or less then this is an ideal TV. More than 34ms and your TV?s response time is unacceptable. He also states that the ?digital signage? TV he purchased has a 4ms delay which is amazing. So, why would he give everyone a frame conversion chart AND say that the TV he bought and recommends is good because it has a 4ms delay if response time has nothing to do with lag? Isn?t that what lag is? Dictionary.com defines lag as failing to keep up with or to fail to maintain a desired pace. So if I press punch on my controller it sends it to the ps3 which processes it and sends it out and the TV takes 4ms to respond that means my TV?s lag is at 4ms. If I am making no sense I am sorry and please someone correct me.
The pixel response time of the LCD panel is approximately how long it takes to change a pixel from its current state to a new state after it has received all of the video data and is ready to display it.
This response time is acceptable on most LCD panels now, even though lower is still better.
What affects current high-definition displays the most right now is processing lag (aka “input lag”). After receiving the raw data from the output device (your PS3), your TV starts processing the data. It may resize it, deinterlace it, enhance color, enhance sharpness, whatever, before even attempting to display it, and this is what takes up the most time. ALL high-definition displays (including CRTs) have processing lag, the question is how much lag.
Thanks for your response Robo. I think I understand better what the original post is talking about but I do have another question that the original post does not seem to address. If I am shopping for a tv how do I find out how much processing lag there is? I don’t see this advertised on the sample tv he posted nor can I find it advertised on any other tv spec sheet on newegg or bestbuy. Can I call the manufacturer and ask them? Or do I have to actually ask bestbuy to let me bring in my PS3 and rockband to so I can hook it up to a tv I want to buy and test it while I am there?
This isn’t something they advertise right now because not enough people know about it to make a stink and the gaming community is a fraction of the TV market. The best way to figure it out is to do just as you said, bring in RB2 and see for yourself. Alternatively, you could look on some AVS forums to see if your TV has already been tested.
It isn’t an advertised spec. It can vary within the same display depending on the configuration settings as well. It can even vary on the same set with the same settings, for each input, and for each display resolution on each input. And the processing chips between differing models in the same model lineup (e.g. 42" vs. 60") will differ, or their programming will differ, and thus the processing lag will differ. This is why lag has to be tested on a per-model basis, and is a giant pain in the hole to assess when shopping for a new display. 
I just ran the Rock Band 2 test thingy on my PS3 and Toshiba 40RV525U (1080p native). According to the OP, there is a test which requires no user input if you have a mic or guitar, but I don’t have either, so I did the lag test by hitting the X button when I heard the drum (for audio lag) and when I saw the ticker swing to one side or another (for video lag). So the caveat here is that my results are likely user-dependent to some extent. I did the test many times, and here are some results.
Audio lag was 80 to 90 ms. I’m not too worried about audio lag. Should I be?
Video lag was 35-40 ms. This was done with game mode on and HDMI hook up. I displayed the game in 720p and 480i and didn’t see much of a difference.
Hopefully I can borrow a guitar to check the automatically measured lag. Does this function really exist in RB2? I don’t know if I misunderstood the OP.
It does exist, but you must have the official RB2 guitar in order to run it. Any other controller (including older guitars) will get you the manual test.
Rock Band automated and manual tests as well as GH tests will never give you the correct numbers for your HDTV. (and they will almost always disagree with each other as well) Only use these tests if you have no real way to do it correctly.
What other reliable way is there?
The most reliable way is to create controller with an LED that lights up when you press a button or input a direction on the joystick.
You then film the controller, LED, and HDTV all in one shot with a camcorder at 60-120 frames per second.
You then count the frames in between the time you press the button and the LED lights up to the time the character performs the move on screen. If character reacts on screen later than a frame after the LED lights up you know you have input lag.
This not only tests your HDTV for input lag, but it tests if the game has built in lag in it as well which is something people have accused HDR of having.
I know NKI tested out CCC for lag and I would be interested in knowing if this is the way he did it.
That still sounds pretty unreliable. You would have to know that the move you’re doing has 0f startup and has 0f to be displayed onscreen. And even then chances are you pushed the button inbetween frames, so it’s going to take up to 1f or 1/60th of a second to update regardless so your accuracy only is within 1 frame. So it would be more accurate to say that if your character reacts more than 2/60ths of a second after the LED lights up you DEFINITELY have some sort of lag going on. Anything less than that has too many variables to know for sure.
How do the automatic RB2 tests work? Cynn cites them as unreliable. Should I even bother?
How does reading work? Do I have to read that informative 1st post of the thread or can I just post like a dumbass?
Sony KDL-40S2000 (VGA input running in native res. 1360x768)
i dont have rb2 to test so i wonder what the difference is compared to running it vga and component/hdmi
im upset to see such a huge difference… 31ms is huge to me… what to do … what to do…
http://img257.imageshack.us/img257/7978/dsc02179.jpg
http://img6.imageshack.us/img6/5866/dsc02184onw.jpg
has anyone done tests using HDMI vs Component on a Digital display (HDTV)
I keep reading component would offer less lag than HDMI. I know the ps3 outputs in digital, and if i use component it would have to convert the signal to analogue, then my HDTV would have to convert that signal back to digital? Is this true, or am I just confused.
Yeah that’s what he did
http://forums.shoryuken.com/showthread.php?t=144797
It works better if you have something to compare it with.
Hook up your ps3/360, hdtv, and game that you want to test. Separately, hook up console, tv, and game that you know/believe doesn’t lag. Y-Connect two buttons (or directions), one on each controller together so that one press activates both simultaneously. Record both tvs after pressing the button and count the number of frames (if any) it takes the hdtv to display the input after the lag-free display.
Based on NKI’s results, Ryu’s cr.hk on PSX ST begins about the same time as the arcade when using a sony controller. So, compare this with SFHD classic mode on your hd setup as an example.
It’s pretty straightforward if you can record at 60fps. If you’re recording at 30, then figure 1/30sec for each frame. You’ll have to record multiple presses to account for not knowing exactly which of the two frames the button was pressed in this case.
So I bought a Sharp Aquos lc-42d65u. Awesome t.v. Need to do a lag test to see how it responds.
I currently have my PC hooked up to it (vga) until I get a new t.v. stand or computer desk (the computer desk I was using was perfect for this t.v. But 42’’ just for the pc is wayyyyyy to big). I can’t seem to get my PC image to display in a 16:9 aspect ratio. Right now the t.v’s view mode is in ‘dot to dot’ and my pc’s resolution is at 1280x1024 which displays at a 4:3 ratio.
What do I need to do to get it to fill the screen without having to stretch the image?
Update your drivers? You should easily be able to run a widescreen resolution on an even kind of recent system.
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Can’t figure it out. The closest res. setting to 16:9 I guess would be 1280x720, but the t.v. says ‘image not compatible with this signal’. I even tried adding a 1920x1080 resolution, I guess I would need DVI or HDMI?
I was thinking of using street fighter iv itself to check reaction times, it’s not accurate, but I figured if I could cancel fine within 1 frame then it’s not an issue anyway. I’m sure someone will correct me if this is wrong:
Playing with ken do fp.srk, the frame data says that the 2nd hit should only have two frames. So when you see the first frame of the 2nd hit fadc. If you can do it consistently, you’re timing in the game is probably not affected much by your input lag.
Again, it just seems practical to me, but it doesn’t really measure how much input lag your tv has since I don’t know if capcom gave some space for after each frame to let you cancel.