8K TV is on sale! Recently, the first consumer-grade 8K TV has finally arrived, and 8K monitors have already appeared on the market. Although 4K has only just become popular, there are more eager users. Playing 4K has also been a bit tedious. So, some people have turned their attention to 8K. Now 8K TV is also being sold. Isn't it worth the early adopters? Unfortunately, 8k is still a chicken rib. Let's talk about it today.
Why is 8K video so rare?
There is no doubt that the current 8K video is extremely rare. One of the reasons that I believe many of my friends buy high-resolution devices is to watch videos. Why is there so little 8K video? This has a great relationship with video coding technology.
Whether or not a certain resolution video can be popular depends in large part on video encoding. With the increase of resolution and bit rate, video must use a higher compression ratio in order to obtain a more ideal volume - or a video at any time on the two T, the hard disk can not eat much, let alone network transmission.
For example, in the DVD era, video encoding was MPEG-2. By the Blu-ray era, the resolution was increased from 480p to 1080p, and it was necessary to use H.264/AVC for encoding. The compression rate was more than double that of MEPG-2; In the 4K era, H.264 couldn't hold on. It must use H.265/HEVC encoding to fit video into a 100GB BD-XL disc.
Compared with 4K, the resolution of 8K has increased by 4 times. If you use the most efficient H.265/HEVC encoding available, the volume will increase several times as much as 4K Blu-ray. No matter if it is an optical disc or a network, it cannot stand such a huge volume of video at all, but it can only reduce the bit rate madly, and 8K video can only be practical - but it means that the picture quality will be greatly reduced, which is not worth the candle.
Therefore, because there is no suitable encoding, 8K video is not suitable for the current carrier, which is why the 8K video is so scarce now. If you buy an 8K device, it is likely to be useless.
Can 8K video decode output successfully?
Some friends may say that although there is no 8K CD-ROM, there are very few 8K videos on the Internet, but 8K video is still there to use. However, 8K video playback and output may be a problem in itself.
First, an increase in resolution means an increase in decoding pressure. At present, the 4K HEVC peak computation amount is 400~500 GOPS. If it is the same encoding 8K video, then the amount of computation required is only high. This amount of calculation, relying on the CPU pure software solution, it is difficult to eat and lose, dropping the frame and even the slide is a common thing. CPU can not eat, can use GPU hard solution?
Does not. Whether it is NV's PureVedio, AMD's UVD or Intel's QSV, there is currently no support for hard-to-solution 8K resolution. At the same time, there are almost no devices such as Blu-ray players/TV boxes that support 8K video playback. Therefore, if you want to play 8K videos smoothly, you should first assess whether your device is overkill.
On the output side, the interface capable of outputting 8K resolution is HDMI 2.1, and DisplayPort 1.4. Compared with other 8K video playback conditions, the interface is relatively loose, although the HDMI 2.1 in the market basically can not see, but as long as it is a relatively new graphics card, DP 1.4 is still equipped. The 8K display basically also has a DP 1.4 interface, even if the interpolation can not meet the bandwidth, you can also use two DP 1.4 to achieve 8K/60 frames. However, the DP interface is rarely seen on TVs. At present, the HDMI 2.1 TV sets have disappeared. After all, the interface was only announced in April of this year. If you buy an 8K TV that doesn't have an interface, it would be too bad.
What user is suitable for 8K?
Although 8K video is rare, decoding is difficult, but in addition to 8K video, such a high resolution, there are other applications. For example, it is possible to play games. Some games support 8K resolution rendering, and using top-level configurations such as GTX1080TI SLI is not unplayable. The foreign media Digitalfoundry has done related tests. Under the 8K resolution, the dual GTX1080TI can run close to 60 frames in “Metal Gear 5: Phantom Pain†and run around 30 frames in “Tomb Raider: Risingâ€. In Crysis 3, he ran 30 frames and ran nearly 30 frames in Battlefield 1. If you lower the picture quality slightly, the performance will be better, and this frame rate is already available for playability.
For another example, for graphic designers and photographers, the high resolution of 8K is also quite practical. 8K resolution can provide more than 30 million pixels, which means that many digital SLR photos without scaling, you can point to the entire display in the 8K display. For high-quality 8K displays, it's a good choice.
When will 8K resolution be popularized?
Whether or not a new technology can be popularized depends on the development of the technology itself, on the one hand, and the history process on the other. From the historical perspective, the higher resolution of the popularization of the inevitable, so 8K can enter the millions of households, mainly depends on the maturity of the technology and large-scale commercialization.
We can refer to the popularity of 4K resolution. At present, the popularity of 4K can be said to have been a nail-biting thing. First of all, Blu-ray has officially established the UHD-BD standard, which gives 4K a stable specification and source. Secondly, the latest GPUs currently provide hard solution support for 4K resolution H.265/HEVC. There is no shortage of 4K players on the market, and Xbox One is a cost-effective playback device. Moreover, the mainstream HDMI 2.0 and DP 1.4 interfaces can output 4K video, and 4K display devices have been fully distributed, 4K. It was only with the prevailing conditions.
8K must also fulfill these conditions before it can gradually transform from a chicken rib into a practical technology. So when 8K is about to become practical? It is still too early to look at the time. 4K has only begun to gain popularity. 8K has no practical value in the last two or three years. The 2020 Tokyo Olympics will be the first to be broadcast on 8K programs. Perhaps it will accelerate the popularity of 8K resolution.
In short, apart from a few high-end applications, 8K resolution has no practical value. 8K resolution supporting hardware and software have not kept pace, it is too early to buy 8K products, hope that we can rationally buy 8K products.
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