Originally Posted by ewto16
What is BFI? Sorry, I'm lost on many of these acronyms.
I did watch some of Orphan Black last night on Amazon in UHD. I was pretty blown away by how it looked. I caught one time where the TV struggled to handle the movement properly, but otherwise things looked fine. I set the judder to 4.
Should the de-blur be at 0 or 10? I think I read it both ways in this thread? Are there any other settings I should turn off in the ISF Dark Mode?
I assume for PS4 games, I should set the picture to Game mode?
Imagine you have an object 'A' moving from the left to the right of the screen.
What your TV will actually display is a succession of static pictures, that your brain will interpret as a continuous movement :
'In real life', your eyes need to follow such a moving object to get a clear picture of it. This i's because of persistence of vision (when your photoreceptors gather light they stay excited for a certain time (it decays progressively) even if there is no more light coming). If your eyes don't move, what you will see is a 'blurred trail'. (In the case of the TV, a superposition of pictures 1, 2, 3...)
So your brain will tell to your eyes to move and to follow this object 'A'...and this is where it starts to become tricky!
Unlike plasma or CRT display, OLED and LCD displays use 'sample & hold' display method.
This means that they display 'picture 1' continuously, until it is replaced by 'picture 2', then 'picture 3', and so on. In other words, it means that they will display for a significant amount of time a static object 'A', that will jump from one position to another when a new frame is displayed...while your eyes will try to follow the very same object 'A' in a continuous movement.
This will cause blur, because your eyes move while object 'A' is static and persistence of vision kicks in. No matter how fast the display response time is, it will be blurred. Even if with an OLED display whose response time is insanely fast.
They are several way to improve that.
First way is to improve framerate :
Every single picture is displayed for a shorter amount of time. Distance between to occurrences of object 'A' is shorter. Thus, the blur caused by your eye movement is reduced. This also produced way smoother movement, not jerky jumps.
The problem is: how can you do that if your source framerate is let's say a 24fps Blu-ray disc?
Solution is frame interpolation. Your source contains (for example) 'picture 1' and 'picture 3' and your TV tries to guess what 'picture 2' should look like.
Drawbacks are artefacts (interpolated frames are not accurate, especially if you have moving objects on static background) and 'soap opera effect' (we are not used to hyper-smooth movies, plus our brain is not 'tricked' the same way by what we see when we get smoother and sharper perception...).
The second option is to display every single frame only for a very short period of time, then only display black until the next frame comes. The shorter the frame di displayed, the sharper it will look because meanwhile this short duration your eye movement will become negligible. Persistence of vision will make that you don't see the display flicker.
This can be done by shutting off the display/adding black frames between each frame...this is what BFI (Black Frame Insertion) is.