Since the birth of the 4K TV a few years ago, there have been true and false 4K sayings, and from the beginning to the present, these pseudo 4K have also changed into a variety of tricks, and the ordinary consumers have been devastated enough. How can you avoid these potholes of pseudo-4K TV? With 4K TV, you must know the following four questions:
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Question 1: In addition to 4K pseudo-4K TV screen, the others are all fake
To be called a true 4K TV, in addition to the screen to meet the 4K resolution (3840 × 2160), but also able to input 4K image signal, can decode 4K video, otherwise it is "in the kettle boiled dumplings - there is no stock will not fall." However, at the earliest time there was a group of pseudo 4K TVs that could not input 4K image signals (the video interface did not reach HDMI 1.4), nor could they decode 4K videos (which could not be connected to the mobile hard disk to put 4K videos), but could only expand the ordinary 1080P images. 4K is displayed on the screen. This is the most pseudo-4K TV with no technical content. Now it is basically extinct.
Question 2: Pseudo 4K TV can only broadcast 4K with mobile hard disk
This kind of 4K TV is based on the former kind of added 4K decoding chip, but the HDMI interface is still the old version. Users want to enjoy 4K programs on them, but they can only plug in a USB flash drive or a removable hard disk and connect to a box that supports 4K. Since the TV video interface is old and cannot input 4K image signals, these TVs are still disabled 4K TVs.
Question 3: Pseudo 4K TV still uses H.264 encoding technology
H.263 coding technology has supported 720P. H.264 has brought the golden age of 1080P. Recall that H.264 has been born for more than 10 years. Today, when 4K is popular, can you forget the key H.265 behind it? The answer, of course, is negative. In the next five years, it must be H.265.
H.265 is an encoding technology that is almost one generation ahead of H.264. Without H.265, there is no 4K in the video industry, and hardware resolution is not easy to improve. However, the leading technology in coding technology is the key. At present, China's average speed is only ranked 91st in the world, and its average speed is only 3.7MB/s. Such a speed is a stretch for 4K. However, H.265 requires only half the bandwidth of H.264 to play the same quality video. This not only reduces the bandwidth cost of video websites, but also is extremely important for 4K smart TVs that are the main players in the Internet. However, in 4K TVs, the current availability of both 4K and H.265 format encodings has not yet been popularized.
Question 4: The lack of 4K content
Buying 4K TV but not seeing 4K content is indeed a difficult problem at present, but 4K content is not really "deficient". The real lack of 4K content is the distribution channel of 4K content. Traditional channels include TV stations, Blu-ray discs, and the like, but so far there has been no 4K television channel in the world and no 4K Blu-ray discs have been launched. This time, the Internet has taken the lead. Netflix abroad has taken the lead in broadcasting 4K "house of cards", Youtube also supports 4K, and domestic companies such as LeTV have launched genuine 4K content.