Are you ready to change television? You still need to understand these basics

A few years ago, 4K and UHD (Ultra HD) were still very avant-garde words for most consumers. Now they have become new television standards. As long as you want to buy more than 40-inch TV, almost all of these two keywords can not be separated. So, if higher resolution means better? Is it more worthwhile to purchase a TV with more advanced technology? Let us discuss these issues below.
What is the difference between 4K and UHD?
In consumer products, they are no different and are almost interchangeable. However, from the perspective of professional fields such as video and film production, 4K on consumer-grade products is not a true 4K.
In the professional field, 4K refers to a digital imaging standard of 4096 x 2160 pixel resolution, 4096 is long, 2160 is wide, and the ratio is 1.85:1. From the numbers we can see why it is called 4K, and its length and width are twice that of 2K (2048 x 1080).
The screen ratio of consumer TVs is generally 16:9 or 1.78:1. Its length is not as good as the standard 4K. The final resolution is 3840 x 2160 pixels. Both the length and width are 1080p (also known as Full HD, 1920 x 1080 pixels. Twice. Therefore, many businesses have claimed that the resolution of 4K TV is four times that of 1080p, as a selling point.
In 2013, the Consumer Electronics Association of America (CEA), now known as the Consumer Technology Association (CTA), decided to end this confusion by referring to 4K and UHD as UHD (hereinafter collectively referred to as UHD). However, the concept of 4K has been deeply rooted in people's minds, which has caused a lot of trouble for the unified name. In addition, there are some manufacturers (such as Sony) insist on using 4K.
Is UHD TV necessary to buy it?
Cooking at home is good enough. Why go to restaurants every day? The choice of TV is also a reason. In 2009, the United States formally stopped the broadcasting of analog signals. The risk of 1080p digital signals has not been replaced for the time being. Of course, UHD TV is a better choice if you want to be in one step.
In simple terms, if you are satisfied with the 1080p TV in your current home, then there is no need to change; if you are ready to buy a new TV, then it is better to buy UHD TV.
What are the advantages of UHD TV?
Compared to HDTVs, the most obvious and intuitive upgrade of UHD TVs is high pixel. In the same area, 1080p TVs can only accommodate 2 million pixels, while UHD TVs can accommodate 800 pixels. Obviously this is a huge improvement, especially when watching local 4K content, because the pixels in the same area are quadrupled, so the details of the image are more abundant.
Although in order to see more details of the picture, the user needs to sit close to the TV. But don't forget that UHD TVs have a better color gamut in addition to a large screen, better color depth, and some models also support HDR.
Some people have said that UHD resolution does not have much effect on screens below 55 inches and traditional viewing distances. In actual tests, we put the 1080p TV and UHD TV together. The former plays 1080p Blu-ray video, while the latter plays the UHD version of the same movie. The viewing distance is the daily distance. The results show that there is a big gap between the playback effects of the two.
Which brand of UHD TV is better?
In the past, UHD TVs were exclusive to some manufacturers, and the market has undergone tremendous changes. Although you can still find some 1080p TVs in the market, most of them are low-end models. At present, most mainstream TVs of mainstream TV manufacturers use UHD resolution. Of course, the best brands are still Sony, LG and Samsung, followed by Vizio provides a good price, Hisense and other Chinese manufacturers also have good quality products.
Can HDMI cable drive UHD video?
The answer is yes, but you have to choose the right version. The HDMI 1.4 standard can only transmit UHD video content at a rate of 30 frames per second. In order to better utilize the higher frame rate and color gamut of UHD TVs, HDMI 2.0 is an inevitable choice. However, HDMI 2.0 can only be half as successful, because if the device only has HDMI 2.0 interface, but does not support the HDCP 2.2 standard, then in the future may not be able to transfer 4K content that supports the HDCP 2.2 copyright protection program.
What is HDR? Does all UHD TVs support it?
HDR is an abbreviation for High Dynamic Range. In simple terms, HDR is a technique that makes white white and black even more black and improves color and contrast. In fact, HDR brings greater upgrades to TVs than UHD resolutions, so it's best to look for this feature when buying a TV.
Not all UHD TVs support HDR. Only mid-to-high-end models will be equipped with this technology. HDR currently has two standards, namely HDR10 and Dolby Vision. Currently, there are more HDR10 TVs on the market.
Where does the video content get?
In addition to streaming services such as Netflix and Amazon Instant Video, many vendors have also come up with their own UHD Blu-ray players, including Samsung, Philips, OPPO and Panasonic.
In addition to special sports events such as the Olympics, there are currently very few UHD content on live TV. With the popularity of the next-generation TV standard, ATSC 3.0, more and more UHD content will be on TV.
How about 8K TV? Will it make UHD outdated?
The 8K resolution is 7680 x 4320 pixels, so it is also known as 4320p. Its pixels are 4 times that of UHD and 16 times that of 1080p. It's a bit strange to stand up, but this technology does exist, and some vendors have also introduced prototype products.
When 1080p appeared, 720p quickly exited the stage of history, so people have reason to worry about whether UHD will follow suit. At present, Japan’s NHK TV station is working hard to promote the popularization of 8K, among which the crucial H.265 coding technology has achieved a breakthrough. NHK first transmitted 8K content in August last year and plans to broadcast the Tokyo Olympics in 8K resolution by 2020.
However, for those who have already purchased UHD TVs, there is nothing to worry about. At present, 1080p still occupies a large number of markets. The popularity of 4K has not yet been realized, let alone how far 8K is from us.

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