This article is from the WeChat public account: 爱 范 儿 (ID: ifanr) , author: Moose
Better picture quality, higher brightness, and more brilliant colors are probably the slogans that most TV manufacturers are accustomed to. Now they have used similar descriptions in the promotion of 8K TVs. There are still some doubts about this new technology.
The biggest question is, can our naked eyes perceive the details shown by 8K UHD TVs? If it is compared with 4K TV, how much is the difference between the two?
Recently, Warner Bros., a well-known film production company, has launched a study that launched a “double-blind test” with Pixar, Amazon Prime Video, and LG and other companies to analyze consumers ’4K and 8K TV content. Perceive differences.
But the research found that most people have a hard time telling the difference.
The testing process used by Warner Bros. is more rigorous. They selected a total of 7 test videos from movies and TV shows such as “Dunkirk”, “Brave” and “Nature”, all of which are HDR10 encoded.
At the same time, Warner also showed the maximum content brightness of each video clip (MaxCLL) , and the maximum average content brightness of (MaxFALL) , which can basically cover most of the mainstream scenes.
A total of 193 people participated in the test. Each time, 5 viewers will be put into the room to watch TV for 30 minutes. Two of them will sit 1.5 meters in front of the TV, while the other three will stand 2.75 meters away.
The reason why these two distances are fixed is mainly based on the average data of the International Telecommunication Union. The latter believes that 2.13 meters is currently the distance most people would choose to watch TV at home, but it has nothing to do with the size of the TV.
In actual viewing, testers will see the 4K and 8K versions of the above 7 clips, which will be referred to by “A” and “B”, respectively, and users will give a “Which version is better” evaluation Just fine.
Of course, the playback order of the two versions is naturally disrupted. The tester only knows that he sees the A and B versions, and does not know which one is 4K and which one is 8K.
At the same time, Warner also introduced some random factors during the test. For example, only let users see4K version, but there will still be A / B switching on the screen. Warner believes that this “deception” can better let testers make judgments based on their actual feelings.
Another feature of this study is that Warner also performed a vision test on all test subjects, using a number like “20 / x” to quantify their “visual acuity.”
Among them, the person shown as “20/20” is a person with normal visual acuity, which means that within a distance of 20 feet, this tester can distinguish the same object as other people with normal visual acuity detail.
If it is “20/10”, it means that within 20 feet, he can distinguish what other people with normal visual acuity can only see within 10 feet, which means that his “visual acuity” will Higher than ordinary people.
From the results, 34% of the testers have a normal vision range of “20/20”, 39% will be low, and 27% will be higher than this number-it turns out that , These 27% of users will actually have a higher perception of 8K video than other testers.
But speaking back to the results of the entire project, the majority of people who think that “4K and 8K video effects are basically the same” still account for the majority, which is slightly higher than the range of “8K is better than 4K.”
Interestingly, there are quite a few reviewsIt falls within the range of “4K is not as good as 8K”. In response to this situation, Warner believes that this may be “users can’t see the difference at all, so they can only judge by guessing.”
So, can we think that 8K TV is worthless? The conclusion must be analyzed on a case-by-case basis.
In the view of the research group, users’ perception of 8K TV depends on the content to a large extent.
Although in this test, most of the video clips were evaluated as “the 4K and 8K effects are basically the same”, but only the 7th video was rated “8K is better than 4K”, which is exactly this video It is an ultra-high-definition natural landscape video, which contains more details, and this will indeed be more advantageous when played on 8K TV.
So, If you just stretch 4K content and play it on 8K TV, the improvement is really limited; but switching to native 8K video may give you more advantages of 8K TV.
Another reason for poor 4K and 8K perception is related to our distance from the TV.
Users are standing closer and can naturally detect the difference between two different resolutions, but if the line-of-sight environment and the size of the TV are fixed, simply upgrading to 8K does notWill bring significant visual improvements.
So TV manufacturers now tend to launch TVs of 70 inches or even 80 inches or larger, also to highlight the advantages of 8K resolution.
This article is from the WeChat public account: 爱 范 儿 (ID: ifanr) , author: Moose