"4K this slogan industry has already shouted for many years, the resolution of 4K video is four times the resolution of 1080p, which can provide a clear visual experience that can be seen, and listening is quite attractive. However, since the long time, Everyone did not find a few, more do not seem to see what the chicken hairy hairy. Fortunately, the 4K era, finally came.
4K is not popular, because it is a variety of diversification. The biggest reason, is that the standard of 4K blue light is late - don't look at real life seems to be very small to buy CD, but the promotion of the video specifications of the video is inseparable from Blue-ray tissue.
Although from 2012, 13, the industry continued to push the heat of 4K video, but until 2015, Blu-ray organization officially released UHD BD, which is 4K Blu-ray specification - can say that the regular army of this 4K video Formal in the historical stage.
In 2016, 4K UHD BD film products began to appear; in 2017, the first Blu-rash drive for UHD BD was sold. The reason why the online is very small to circulate is very much because there is no one in the most important film source of 4k discs. Now, everything is ready. If you see the genuine UHD BD, you have seen the crack video from the UHD BD, you can say that the popularity of 4K video has been referred to.
Not everyone has leisurely, special to buy a Blu-ray player to see UHD BD dish, more people are used to appreciate 4K video. When the 1080p video is now popular, a bunch of computers are tossing. Now 4K video is coming, naturally, it will not be a toss. Today, let's talk about computer broadcast 4K to pay attention to something.
CPU and graphics card use: i7 / ryzen can get it?
To play 4K videos, you must naturally need to decode 4k smoothly. Here, the specifications of the UHD BD advocated by the Blu-ray tissue are referenced. The standards advocated by Blu-rash organizations have several key points, namely H.265 (HEVC) encoding, 10-bit color depth and HDR color (up to BT.2020 color gamut), and BD for genuine play users -XL (double layer 66GB 108Mbps / three-layer 100GB 128Mbps) and two key points of AACS 2.0. The computer is going to play 4K, you need to get started from these key points. Let's first talk about the relevant problems of the decoded part, that is, the problem of decoding H.265 / HEVC, 10-Bit color depth and HDR color.
Each new generation of video specifications appear, and for the computer, the biggest challenge is often an operational ability. The 1080p coding is H.264 / AVC, and its compression efficiency is more than doubled than the MEPG-2, and the living life has increased the decoding difficulty to be at least 3 times. The peak operation is required to up to 100GOPS, and a pile of Pentium D and speed dragons X2 is tossing to die. Today, H.265 / HEVC has the style of H.264 at the time, and the compression efficiency is still doubled. The decoding difficulty is deodorated and more than 3 times, and the peak operation has soared to 400 ~ 500 gops.
To decode 4K video, if you use the CPU purely, you want to get a good experience. It is recommended to use the I7 / Ryzen 5-level or more CPU (not necessarily meeting the peak operational demand). Soft solutions have a large consumption of resources. If the video code rate is large, the number of frames is higher, for example, the number of fuses is not necessarily eaten, and it is recommended to play. If you have hard solution, there are many more attention.
Hard solution and GPU are related to NV. NV hard solution technology is Purevideo, which is better to decode 4K HEVC 10-bit video, and requires PureVideo VP7 or above. So what NV graphics card supports this specification? The latest Paska, including GP102, GP104, GP106, GP107, GP108 core, all equipped with PureVideo VP8, hard solution 4K HEVC 10-bit video no pressure; but the previous generation is quiz, only GM206 (including GTX 950) , GTX 960) Supports PureVideo VP7, all of which only support VP6.
Let me talk about AMD's GPU. The hard solution technology of AMD GPU is UVD, only UVD 6.3 or above, can hardly solve the 4K HEVC 10-Bit video. AMD is currently only the RX 400 series, and the RX 500 series has the ability to solve, and the APU can not succumb.
Intel's GPU hard solution technology is Intel Quick Sync Video, only Broxton (the latest generation atom, discontinued), and Kaby Lake (seventh generation Core) can hardly solve 4K HEVC 10-bit video.
In addition to the model number, there is also a simple judgment to how the GPU can hardly solve the 4K HEVC 10-Bit video - using Dxvachecker's small software. If you see "4K" or "QFHD" in the "HEVC_VLD_MAIN10" column, then the GPU can hardly solve the 4K HEVC 10-bit video.
Playing software selection: not just XX video and audio
To play 4K videos, there is also something in software. Many friends are accustomed to players such as domestic XX audio and video, but these players may not allow graphics card hard solution video - domestic many players are stolen foreign FFMEPG filters as video decoding, and it is even quite old Old version. Therefore, it is a better solution using the LAV filter and the MADVR renderer using the LAV filter and the MADVR renderer.
The LAV filter is the most powerful video playback assembly under the Win platform. The LAV filter can perfectly achieve the hard solution of 4K HEVC 10-bit video; the MADVR is the strongest renderer, which can processes HDR colors. Question, including the color conversion of BT.2020-BT.709 - Many displays do not support BT.2020, and if they do not convert, video play will be gray and abnormal. LAV is going to be in version 0.64, with MADVR can automatically identify the conversion BT.2020 to BT.709 without manual settings. To hardly solve the HEVC 10-bit video, you need to set the LAV decoder to DXVA2.
Therefore, the author recommends playing 4K videos using PotPlayer, MPC, KMPlayer, and the like can play 4K videos with a player that can plug-in filter and renderer. Recommended with PotPlayer + LAV + MADVR, or MPC-HC + LAV + MADVR.
Video output interface: Careful motherboard HDMI interface pit
Successfully decode 4K video on your computer, but can you display 4K resolution on the display? uncertain. Not all video interfaces can output 4K resolution. If the mainstream video interface, only the HDMI interface and the DP interface can output 4K resolution. Among them, the HDMI interface only has a version of HDMI 1.4 to output 4K, only HDMI 2.0 can output a picture of 4K / 60 frames.
Therefore, if you use the HDMI to connect the monitor / TV, you must look for HDMI 2.0-7 generations to support 4K / 60 frames, but many of the HDMI interfaces of many 200-series motherboards are castrated into 1.4, which is unable to implement 4K / 60 frames. Output. Among them, HDMI 2.0a is better than HDMI 2.0B, and HDMI 2.0A has a larger bandwidth, which supports higher color depth, which has better support for HDR.
If you use a DP interface, DP 1.4 can support 4K / 60 frames / HDR perfect. The DP 1.2 bandwidth is also sufficient to support 4K / 60 frames, but HDR / BT.2020 is not supported. Comparing new graphics card DP versions are 1.4, no need to worry too much. Whether it is HDMI or DP, the version number is only related to the interface, the cable can be used in conformity, it can be universal without high-priced purchase of so-called dedicated boil lines.
Genuine UHD BD CD: Need to specify hardware and software
The above content is only for 4K video without copyright restrictions. Although there have been 4K UHD BD's cracking resources, the Crack method of UHD BD has not been announced, and the 4K resource cracked has not been emerging. Some friends will purchase the UHD BD genuine CD, and the DRM problem must be considered with computer playback.
The copyright protection of the UHD BD is AACS 2.0, and HDCP 2.2. If the computer cannot pass AACS 2.0, it cannot be read; the output interface does not support HDCP 2.2, and the resolution cannot reach 4K. At present, you can read the CD-ROM drive of the UHD BD genuine CD, but the quantity is less, this year's optical drive vendors began to launch the corresponding products, such as the pioneer launched several 4K UHD BD drive, everyone chooses the Opto-drive must be considered to support UHD BD .
In addition to the optical drive, the CPU also has more attention. At present, the UHD BD defines the SGX security technology to be Intel to play. This technology only exists in some Kaby Lake and Sky Lake CPU, all platforms such as all platforms, Intel's X99 and other platforms cannot play the copyright limit UHD BD. To see the genuine 4K blue disc, the a rice is not enough!
In terms of playing software, only genuine, the latest version of PowerDVD 17 can play UHD BD, and the crack version cannot be played. This software is not cheap, and the quarter is charged at 99 yuan. However, buy some UHD BD drive, you may get this software, you can pay attention to the manufacturer's activities and product descriptions.
Win10 must be used in terms of operating system. The video interface has nothing to say, support HDCP 2.2. It can be seen that the current computer play 4K video is a powerful life. Skating is just the most primary solution with i7 / ryzen, you need to play with a graphics card that supports 4K hevc hard solution, you need to configure the play software to decode video and rendering HDR, you need to have HDMI 2.0A / DP1.4 interface; If you are playing genuine, you also need to have a UHD BD drive, you need to support the SGX Intel CPU, require a specific genuine playback software, and the video interface also supports HDCP 2.2. Therefore, the computer is actually not playing 4K's best solution, the best solution is also a special blue machine.
Of course, this will change with 4K's popularity. When the UHD BD is widely crack, the 4K film is full of flights, the fool players will naturally keep up with the pace, just support 4K HEVC as now. For 4K unfriendly graphics cards, the interface will slowly be eliminated, and the computer will become a good tool for playing 4K sooner or later.
Original link: https://www.eeboard.com/news/4k-2/
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