At present, there are many kinds of 4K resolutions in the fields of digital TV and digital photography. Emerging ultra-high resolution standards for digital movies and computer video, in order to cooperate with ultra-high definition TV, the common resolutions of 4K function TV (2 160p) are 3840×2 160 and 4096×2 160 pixels.
The 4K display panel is made of oxide thin film transistor (TFT), which has the advantages of fast electronic movement, high resolution, thin frame and ultra-thin texture, which can make the TV thinner and richer in details.
4K display screen is very common on TV, but if 4K display effect is adopted on ordinary TV at the same level, its price and performance will be much better.
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Identification of "true and false 4K TV";
A few years ago, when 4K TV sets were first introduced, some models were only equipped with 4K screens, but the built-in chips did not have 4K video playback capability, or the decoding format was incomplete, which was dismissed as "fake 4K" by the industry.
In the era of 1080p, the video coding format of H.264 was the mainstream, but after entering the 4K era, H .265 was a coding format specially designed for 4K. According to technical data, the video file encoded by H.265 with the same definition is only half that of H.264, which is convenient for network transmission or file storage.
If 4K TV doesn't support playing 4K video in H.265 format, it can basically be characterized as fake 4K ",which will be embarrassing after H.265 becomes mainstream in the future.
Another recent "fake 4K" is to tamper with the screen. This kind of screen uses adjacent pixels * * * to reduce costs in sub-pixels. The whole screen has only more than 6 million pixels, while the real 4K screen should have more than 8.2 million pixels.
For the previous fake 4K, we can read the product information carefully. If it is mentioned that it supports H 265 format 4K decoding, then don't worry. A safer way is to download the 4K short video in H.265 format on the Internet, install it on a USB flash drive, and take it to the mall for on-site testing.
The latter's fake 4K is very confusing because it is difficult for the naked eye to tell the difference between 6 million pixels and 8 million pixels. Moreover, because the current standard of 4K is not strict, such TV sets can also be marked with 4K Ultra HD logo.
At present, the identification method is to see whether there is the word "RGBW" in its promotional materials or screen specifications. The normal pixel arrangement of 4K TV is RGB mode, and the pixel arrangement of this screen is unique RGBW mode.
References:
Baidu Encyclopedia -4K Resolution