With the Sony Z5 being rated as the best smart phone at IFA2015, its unique 4K resolution screen has once again made 4K the focus of various media talks. Since the 4k technology was born, the topic has been continuously and 4K has been applied. In television, projectors, movies and other fields. As more and more products using 4K technology are developed, do we really need 4K?
The history of 4K technology
4K was first appeared in the movie screening. To make the picture clearer, a lot of content in the movie field has long been released in 4K technical standards, and its distribution and copying can achieve two-way compatibility between 2K and 4K. The 4K TV technology has really become a hot topic. With the advancement of TV manufacturing technology, TV screens have been getting bigger, and TV screen manufacturing technology has been continuously upgraded. Materials such as LCD, plasma, and OLED have been thrown into the screen. In the midst of this, people’s demands for the definition of television content have been continuously improved.
The advantages of 4K technology
First of all, the most intuitive advantage of 4K is the high-definition picture quality. With 4x 1080P resolution, 4K picture quality will bring unprecedented visual experience. Secondly, the hard-screen 4k TV's viewing angle can reach 178 degrees, theoretically reaching a point where there is no dead angle. From any perspective, you can enjoy the ideal picture with accurate and consistent color. Finally, 4K can perfectly achieve 4K signal playback of 2D and 3D film sources, not only can display delicate and realistic 4K images in 2D, but also can display native 4K image quality 3D images, allowing users to easily experience cinematic 3D views. Shadow effect.
Through the above, it is not difficult to find that the advantages of 4K technology are numerous, and 4 the prospects are also very broad, but is it really useful to us at this stage to use 4K technology products? Can it really bring us an unparalleled sensory experience? With this question you will continue to look down.
Current limitations of 4K technology
China has always had an old saying: Swords are equipped with heroes, BMWs are equipped with saddles, and so is 4K technology. Although 4K is a mottled, muddy Moye, it is a trip to Lu. But is there really a swaying hero and a good saddle that doesn't compromise? Currently 4k TVs are commonplace, but even HDTVs advertised by IPTV have only 720P, and more are still old 4;3 signals. Although the PS4, etc. host computer support 4k video download, but its built-in resolution is only 720P. Even if the 4K resource is neglected, the 4K-quality TV program needs to consume 6M/S traffic. That is, the transmission rate per second for the bandwidth is 6M/S=6144kb/s. According to the 1M broadband transmission rate, 1Mb/s=10001000b/s=1000Kb/s=1000/8KB/s=125KB/s for conversion, the bandwidth of 4K picture quality should be at least: 6144÷125≈50M; therefore, transmission of one 4K TV requires more than 50M of bandwidth. . According to tests conducted by Akamai of the United States, the average speed of fixed broadband in China at the end of 2014 was 3.4 Mbps. According to the data released by the Ministry of Industry and Information Technology in July, the total number of broadband users in China with 20Mbps and above is only 21.1%. Finally, we turn our attention back to the earliest films that use 4K technology. Although for a long time, many contents of the film industry are issued in 4K technical standards, and its distribution and copying can achieve two-way compatibility between 2K and 4K. Only the audience could not see the 4K effect on the traditional screen below 10 square meters. According to briefings, at present, only a few hundred of the 16,000 movie screens in China can enjoy the 4K effect.
Conclusion
The 4K technology itself is a simple city of jade, but it still needs time to polish and sculpt, only when the 4k technology related bandwidth, resources, carriers, television signals, and the development of the 4k technology itself will only be truly To replace the old technology, at present, 4k technology is still far more famous than its own strength.
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