Originally Posted by eliau81
ratings.com updated that the vizio p series actually don't display 4k @ 60Hz @ 4:4:4
''Update: From further testing we have concluded that all current Vizio TVs that we have reviewed do not display 4:4:4, but 4:2:2. This is due to the TV inputs accepting 4:4:4 but actually displaying 4:2:2. 4:2:2 is better than 4:2:0, but slightly blurrier for text than 4:4:4. The following images will demonstrate our findings.''
is vizio aware of that?
can thay fix it with an update?
I took several images last night of my computer hooked up to the P75. Here is proof that what RTINGS.com is saying about it being 4:2:2 is not completely accurate.
The first image shows true 4:4:4. It looks nothing like what the RTINGS.com image below that looks like.
What the P75 actually looks like with a 1080p @ 60 FPS 4:4:4 input
What RTINGS.com says the Vizio P-series does from a 4K @ 60 FPS 4:4:4 input
Next we have a picture of what true 4:2:2 on the P75 looks like. It actually doesn’t look that bad and even it still looks way better than what RTINGs.com posted as the 4:4:4 input converted to 4:2:2. However, on certain text you can in fact see issues with a type of rainbow effect. Look at the picture below that and notice the edges have color bleed even from black text. This issue does not appear with a true 4:4:4 input.
Finally, we have a true 4K @ 60 FPS 4:2:0 input and it is obvious how bad this looks. Interestingly it looks very similar to what RTINGS.com posted as their 4:4:4 input. This may have been an honest mistake though. I have encountered situations where I selected 4:4:4 or RGB but it actually got stuck in 4:2:0 mode and looked like this. However, I tested it further to determine if the TV is actually 4:2:2 in ALL situations or not.
Most of those situations occurred when I either switched on “HDMI Color Subsampling” for that input while it was hooked up to the computer or when I altered the Windows Scaling options. However, I didn’t encounter the issue when I switched “HDMI Color Subsampling” on while on a different input. The moral of the story is don’t mess with those settings and then assume that you haven’t messed it up yourself.
If you need to change those settings then do so and then shut everything(Computer, TV, receiver,...etc) down and then restart all of the devices. If you still see issues then back out the changes you made and restart everything. There are some bugs there but the 2016 P-series is most certainly capable of 4:4:4 for some if not all resolutions and frame rates(except no 1080p @ 120 FPS) on HDMI inputs 1-4 and for up to 4K @ 30 FPS on HDMI 5.
I still say that RTINGS.com produces some very good data for most of their test cases. However, when you have to rely on them to draw a subjective conclusion about that data they sometimes are not as complete as I would have liked them to be.
This post has been edited to soften up the language I used against RTINGS.com since they responded with a much appreciated rebuttal of this data.