If you're planning to buy a TV recently, "4K" may be the word you hear most at home appliance stores. Compared with mainstream 1080P high-definition televisions, the 4K resolution is four times that of the former. Because of this eye-catching selling point, 4K TVs have been described as “the only wise choice†when you are faced with a number of features that are similar in price to the product. However, if you are somewhat concerned about the trend of television in recent years, you should remember that around 2010, manufacturers have also been so enthusiastic about recommending 3D TV. This can not help but make people feel guilty: Where is the new 4K TV? It will not be another short-lived innovation?
Where is the new?
What does 4K TV mean? 4K refers to Ultra HD resolution, and we often say that 720P, 1080P also refers to the resolution, 4K TV is the resolution of 3840 × 2160 TV. Current LCD TVs, whether they are 65-inch or 40-inch, have a resolution of almost 1080p (1920×1080). The 4K TV's long and wide pixels are twice that of 1080P, so all pixels are 4 times the size of 1080P. .
On the display screen of the unit area, when the current is 4 times that of the latter pixel, the screen will bring unprecedented visual impact to consumers in terms of brightness and clarity. The delicateness of the picture and its ability to express it will be qualitatively enhanced. The picture is clear and delicate, and the ability to reproduce the image of the object is superb. Even the fine movements of the hair and the fine lines of the eyes can be seen clearly.
In China, 4K TV is coming late. In 2012, there were less than 20 varieties of 4K TVs that could be purchased on the domestic market. However, after entering 2015, the market suddenly “detonatedâ€. The reporter recently found out in the Jingdong Mall that a total of 176 models of 4K TVs are available. Consumer choice. From the cheapest 2699 yuan Leroy 43 inches to the most expensive 120,000 yuan Sony 85 inches readily available. Among them, the mid- to low-end price ranges from RMB 4,000 to RMB 5,000. There are a total of nearly 50 varieties.
Having said so much, for the average consumer, the rest is just a problem: Since 4K TVs have already “jumped†prices, if you want to change TVs now, should you buy 4K TVs?
Watch cable TV, NO!
From the above data, 4K TV is undoubtedly advanced, but advanced is not the most appropriate. In order to enjoy the 4K resolution picture, in addition to the TV must be 4K, the source must also be 4K. The status quo is that film sources can not keep up with the rhythm. What is the status of the current film source?
If you are used to watching live shows on cable TV every night, then 4K TV is still free. At present, domestic TV stations are basically standard-definition programs. The resolution of the screen is about 460p. The high-definition programs provided by a few TV stations only reach 720P (1280×720). If you want to see a high-definition set-top box, you have to spend more than a month. Pay fees.
At present, 4K signals basically only exist in some science and technology news. From the birth of 4K to the current reports on 4K live broadcasting, they have been sizzling slowly. However, everyone knows that there is no TV broadcast signal with 4K resolution in China. It may be a problem that you cannot solve with money.
The resolution of cable TV signals has become far-reaching in popularity, not to mention 1080P and higher 4K resolution. Perhaps the TVs bought in 2015 were all retired and the cable TV signals could not reach 4K. So if your TV is mainly used to watch cable TV, then do not buy 4K TVs.
See 4K discs, NO!
There is no live broadcast on the cable TV. It is always a bit frustrating to see 4K discs.
To date, no 4K television channel has been opened in the world and no 4K Blu-ray disc has been launched. At present, Hollywood and other major film and television companies produce movies and TV shows, the highest resolution is basically 1080P, and currently there is no film and television company has released 4K discs, consumers see 4K in the appliance store TV display images are all 4K images produced by professional production companies for promotion.
Perhaps it is not the video coding technology that blocks it, but the dozens of GB of video files. The size of a 1080P format movie is between 10G and 30G. The size of 4K format is 4 times that of 1080P format, that is, between 40G and 120G. The problem of using 4K video files to occupy storage space is mainly due to the new video encoding format. At present, the most popular is the H.265 format, and Google's main open source format, VP9, ​​both of which can reduce video files to half of the traditional H.264 format under the same picture quality. Basically, a 4K movie in H.265 format occupies almost the same storage space as a 1080p movie in H.264 format; or slightly larger, it can be loaded with an existing Blu-ray disc.
Maybe this year, maybe next year, there may be some 4K discs released by film and television companies, and then another one or two years or more of the market incubation period. Therefore, major film and television companies will sell 4K sources in a large number, probably 2017. Year of things.
Watch online video, NO!
In the end, only the network is left. The situation of this channel is much better. This is the only place where you can still see 4K video except for shopping promotion demos.
Benefited from the H.265 standard released last year, many video sites in China have already supported 4K video resources for compression and compression with this standard. Today, iQiyi, LeTV TV and other video platforms have opened 4K channels. 4K's online source is indeed clearer than the so-called 1080P and ultra clear. If your 4K TV supports H.265, with USB3.0 and HDMI2.0 interface, and the speed of the home is above 20M, then theoretically, you should have no problem if you look at 4K at home.
However, the downloading of related content on the Internet is not small at present, but most of them are high-definition movies, there are a small number of 4K movie trailers, and movie footage loaded with pseudo 4K or true 4K, but the number of movies is extremely rare. The purpose of these 4K sources is more like making those 4K fans masturbate. If you experience the purchase of 4K TV now, most of the time you can contact is watching 1080P or even lower-definition video content.
in conclusion
After reading this, do you think it is necessary to buy a 4K TV? In fact, the current advantages and disadvantages of 4K TVs are equally prominent. With ultra-high resolution and large screen sizes, they provide consumers with an unprecedented fine picture effect. The visual effect enhancement and perception is also the most direct and a qualitative leap from the current mainstream FULLHD full HDTV. Of course, if the TV is basically based on watching TV, then it is absolutely unnecessary to waste 4K TV. If TVs often watch high-definition video through Internet TV boxes and computers, it is best to wait until 4K sources are popular before purchasing 4K TVs.
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