See 4K TV (showing a picture in the resolution is four times higher than HD) – it’s like a discovery. The video with the urban landscape, shown earlier this month at a press conference, Samsung, one could see some windows in most buildings, as well as individuals, members of the skyscrapers and out of them. In consisting of eight million pixels it is very difficult to see the network structure (of course, if you are not looking at very close range), and the image looks like a clear picture, but only in the movement.
However, the world that can be seen on the screens 4K TVs, is to a large extent, is just an illusion – perhaps created from multiple clips, movie cameras filmed a high-end class.
Price is the key factor to keep us from the immediate purchase 4K TV (which is so called because of the fact that its diagonal Screen – about 4000 pixels). Typically, such a television costs at least twice as much as a similar class capabilities and HD-TV (the same size, with high-quality panel, access to the Internet and the same set of functions). However, even if we imagine that the money does not play a role for you or that the prices suddenly fell (and it is not a fantasy – small companies are already selling models at lower prices), there are still four reasons that should make you postpone the purchase of 4K -TV.
The lack of 4K content
On the market today there are no Blu-ray discs, video streaming platform, TV, and even more or less easy to use camera that would support the resolution in pixels 3840h2160. And it is – the first reason to hold off on buying a 4K TV and wait. This wait can be quite long.
Currently, companies that produce TV equipment, trying to provide some limited number of 4K video to iPods containing hard drives. The company Sony, for example, offers a 4K / UltraHD Media Player, on the hard disk is written 10 films in 4K format. The unit is sold at a price of 700 dollars. Sony also promises before the end of the year to provide an opportunity to download the player from the network to a further 100 films (of the stream can be viewed while only dream of – file sizes are quite impressive). However, $ 700 – too much money to spend on the purchase of a device that can show only a small collection of movies.
This media player with a hard drive inside the plans to introduce in the near future, and Samsung.
Little
additional benefits for the usual HD-content
Currently, 4K TVs can scale any HD-video up to 4K by “building” additional image pixels based on assumptions about their content (as well as it does when you are watching on the screen HD-DVD with a regular old standard definition video). The results look quite acceptable on some televisions, in particular, such as the AQUOS Ultra HD LED TV production company Sharp with a diagonal of 69.5 inches (1.8 meters). This model has been certified by the laboratory THX, confirming the quality scale, and costs 8000 dollars. However, if you pridvinetes closer to the screen (as you allow pixels), you will notice the grain structure of the scaled video.
Even the scaled video to 4K the screen will allow you to sit comfortably to this screen at a closer distance than in the case of HD- TV, but not so close that it was possible to speak as about something worthwhile. House of standards under the International Telecommunication Union recommends looking at 4K screen from a distance of not less than one and a half times its height (not to see the individual pixels), and in the case of HDTV, it is desirable to sit at a distance that exceeds the height of the screen not less than three times.
Thus, if you have a TV with a diagonal of 55 inches (1.4 meters) – such diagonals have a starting model from Sony and Samsung, you will be seated at a distance of 1 meter from the screen if it is 4K TV or about 2 meters from the screen, if it is HD-TV. And therefore, if you do not want to sit closer than 2 meters from the TV screen, and you do not spend the extra money. The company Samsung, for example, has only recently started selling the model 4K TVs with a diagonal of 55 inches and they cost 5600 dollars. This is the best model of HD-TV production of the same company with the same diagonal is 2800 dollars (in addition to the lineup of models with 55-inch screen from Samsung, there are cheaper).
4K video can be intermittent
Unfortunately, you can not see on their screens 4K ideally as even the small amount of video 4K format, which is available on the market today. That’s because even the latest models of HDMI-cable (version 1.4) can not pass without problems a large amount of data. The signal on the majority of HD-TV with devices such as player Blu-ray, is passed at a speed of 60 frames per second. However, when transferring video to four times the resolution over HDMI-cable is the only way out is to cut by half the frame rate. But you must admit, at 30 frames per second video will not be quite so smoothly.
4K video can suffer from a lack of color
One more compromise – the details of color. Because of limited bandwidth connection through HDMI 1.4 can transmit 4K signal in which the color data trimmed to 8 bits (256 levels) for each of the three components of a pixel (red, green and blue). Combinations of these basic colors give the range of 16.7 million colors. Perhaps at first glance it seems and well, but the modern liquid crystal panel capable of displaying 10-bit color palette (about one billion colors). Thus, ultra-high resolution video will coexist with relatively poor color palette.
However, engineers and scientists are working to solve these problems. The new version of HDMI, none that will be called HDMI 2.0, will be able to transmit 4K video at 60 frames per second. However, the improvement in the transfer of the color palette, probably not foreseen until the next update of the standard interface.
Here are some basic facts about the new standard HDMI 2.0:
- Resolution 4K @ 50/60, (2160p), which is 4 times the picture quality razreshenie1080p / 60.
- Up to 32 audio channels will help to achieve the effect of total immersion in a multi-faceted range of sound.
- The sampling frequency up to 1536 kHz audio help achieve superior sound clarity.
- Ability to simultaneous transmission of dual video streams for multi-screen.
- Simultaneous multi-stream audio to multiple users ( up to four).
- Support for wide theatrical video aspect ratio 21: 9.
Dynamic synchronization of video and audio streams. - Enhanced bus CEC offers more control and control from a single point of various consumer electronics devices.
The prospect of a new interface standard HDMI – a warning to those who buy today, televisions and other electronics containing HDMI-port standard type. While some companies are willing to spend to upgrade the unit output port technology today. For example, all 4K TVs by Samsung has an external unit, which includes a video signal input ports and performs some processing on this signal. In the case of the new standards will have to input the user interface just to buy a new unit.
However, this is not such a good way to get consumers to pay at least twice more for television, for which today there is not a lot of native content that displays this content with some “pull is enough” and the lack of color, so that in time, with the emergence of new advanced technologies, pay again – have upgrade for your model. All the more so by the time available on the market 4K TVs in any case will cost much less.
Author: Sean Keptin
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