- There are sample pictures below that show that it isn’t 4:4:4. However, I also believe that the M55 CAN do 4K @ 30 FPS 4:4:4 which most of the reviews have said it can’t do. When I hooked my computer to the TV at 4K @ 30 FPS it allows me to select YCbCr 4:4:4 or RGB. In YCbCr 4:4:4 the artifacts are much less noticeable than in 4K @ 60 FPS.
- 4:4:4 Test Pattern. The Extron 4:4:4 Test Pattern is an indispensable tool you can use to determine the color processing performance of your system. To ensure the best quality image, Extron scalers utilize 4:4:4 chroma processing which provides the most accurate reproduction of fine color detail.
Everyone knows that PS4 PRO presents two 2160p option in the Video Output Settings: I got some explanations from members (that I thank by the way) in another thread: some said that 2160p - YUV 420 is the one to use while most fo them said that that 2160p - RGB. That is when I got. Jul 01, 2018 Even 4:4:4 uses the limited range and can be further compressed to 4:2:2 and 4:2:0. If there are exclusions to this, Armenius is the man to ask. I would wait on his input before deciding. If he has nothing further to add I suggest using RGB full.
At the end of this article, I said that I had some doubts about the chroma subsampling used with the LG 49UB850V + GTX 970 at 4K/60Hz resolution. Was it 4:4:4 or rather a reduced format like 4:2:0 ? Today I found a test that brings the answer in no time. The test is simple. Just display the following image with any PNG viewer (by reading this page in your browser for example…) and if you can perfectly read the last two lines (with read and blue background, as well as some other lines like the blue and pink ones) then the chroma subsampling is 4:4:4. Otherwise the chroma is 4:2:0 or 4:2:2. |
So, I tested the LG 49UB850V + GeForce GTX 970 with this chroma torture image and here are the results:
1 – LG 49UB850V 4k @ 30Hz
At 4k @ 30Hz, the last lines are perfectly readable: the 4:4:4 chroma subsampling is in use.
2 – LG 49UB850V 4k @ 60Hz
At 4k @ 30Hz (the GTX 970 is plugged on the HDMI 3 port, with R344.75 driver for Windows 8 64-bit), the last lines are deteriored: no doubt, the chroma is not 4:4:4: but rather a reduced version (4:2:0).
According to some sources, the LG 49UB850V supports 4:4:4 at 4k / 60Hz. Maybe the guilty is the HDMI cable. I will do the test as soon as possible and update this post if necessary.
I found this chroma subsampling test on this page.
4ker 4.4 Gallon
4ker 4.4 Engine
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