According to foreign media reports, for a mature technology dating back to the 1920s, television has never stopped developing and has grown most rapidly in the last decade. From 480i to 720p and the current 1080p, the next generation of 4K Ultra HD TVs will have dazzling picture quality and large screen size. But what is it? What can I do? how to work? The author summarizes the following guidelines to help users better understand 4K Ultra HD TV.

"4K" and "Ultra HD", are they different?

No, in fact, the two are the same. What people see is just two different terms that describe the same technology. Manufacturers just can't agree on how to call it. Basically, 4K or Ultra HD is four times the resolution of the existing 1080P, which technically supports 4096 x 2160 pixels, or 2160P, although the actual pixel level is lower than this, it is 3840 x 2160.

Recently, the Consumer Electronics Association decided that in order to end the confusion and ease of marketing, Ultra HD will become the official name of the new generation of resolution standards. Unfortunately, people have called 4K for too long, making the transition to Ultra HD not very smooth. Some manufacturers, such as Sony, insist on calling it 4K.

Do people need 4K?

No, the 1080P HDTV that people use today will continue to be used for a long time. And there are currently no plans to disable common HD broadcasts. However, once people sit in front of 4K Ultra HD TV, they still can't help but want to upgrade.

What are the benefits of 4K?

The main benefit is that better picture quality. 4K resolution means higher, compared with 20 million like a prime spot 1080P is displayed on the screen 80 million pixels. If people believe that 1080 has been a very sharp high-definition television and a meticulous, 4K can make this feeling even further because the pixels four times smaller than before. This is why part 4K Ultra HD technology is pushed to larger screen - the impact of extra pixels on the big screen more clearly.

More pixels don't mean better picture quality on a larger screen, and higher pixels may make it harder to see a single pixel when sitting close to the TV.

Which 4K Ultra HD TVs can I buy now?

Sony, LG, Samsung and Toshiba have all launched 84-inch giant 4K HDTVs (Samsung is actually 85 inches), but all are expensive - any one is priced from $20,000 to $40,000. A small number of manufacturers have introduced smaller and cheaper models, but they are still expensive compared to today's 1080P TVs. Best Buy has begun selling Sony's small 4K Ultra HD TV, which costs $5,000 for a 55-inch model and $7,000 for a 65-inch model.

More models will be introduced, and all major TV manufacturers are now agreeing to move to 4K. Since Blu-ray and High Definition Multimedia Interface (HDMI) issues will be resolved by the end of the year, autumn and holidays are probably the most likely season for promotion.

Can HDMI handle 4K video?

HDMI is the standard AV cable for existing HDTVs, but the current 1.4a/b version of HDMI cannot handle 4K video at 30 frames per second. In other words, 4K movies can be played smoothly (because they are shot at 24 frames per second), but some games or TV shows may have problems. Today's games render up to 60 frames per second, and some programs that are played on 720P TVs are also broadcast at 60 frames per second. People don't know what the future rendering technology will evolve, or whether TV stations will try to broadcast 4K content at 60 frames per second, but if they do, the 1.4a/b version of HDMI will be the bottleneck. Ultimately, 4K Ultra HDTVs need to be equipped with HDMI 2.0 - which will be available later this year - or some other wired or wireless cable that can handle larger data throughput.

Can 4K Ultra HD TV play standard or HD content? If so, what is the effect?

Yes, but not all TVs are manufactured the same in this respect.

Upgrade the low resolution signal to make it look better on a high resolution screen. For example, the standard resolution TV resolution is 480i and the DVD is 480p. When 720p and 1080p appeared, TV manufacturers were adding operator panel upgrades and some Blu-ray players. This makes standard-definition TV and DVD signals look better on 720p or 1080p TVs, even though they are not true HD signals.

The solution for 4K Ultra HD TV is no different, except that the existing HD 720p or 1080p signal is upgraded to 4K. The cheap 4K Ultra HD TV is impeccable when playing 4K content, but it plays poorly when playing the upgraded standard or HD signal.

The fact that local 4K content is lacking makes this consideration critical. Currently, customers see 1080p HD, 1080i or 720p content on 4K TV. If the TV is not doing well in terms of upgrades, almost all the quality of the content seen will be significantly lower than the 4K quality.

When it comes to local 4K programming content, where can people get it?

There aren't many options yet, but the wheels seem to be rolling. Some channels in Europe and South Korea have begun broadcasting 4K signals, and the British BBC has already planned to play some documentaries at this resolution.

When broadcasters seek their own path, the owner and provider of the content of the program are looking for other ways. This year, this will not include Blu-ray discs, because manufacturers and media companies have not decided what to do, or the disc will be compatible with existing ones.

Blu-ray player. These decisions should at least be made until later this year, so 4K Blu-ray Disc to early 2014, will be listed.

How about Sony's Mastered in 4K Blu-ray Disc?

Blu-ray discs released just a few weeks ago are really confusing for consumers. Specifically, this is not 4K Blu-ray, but a 1080p Blu-ray movie converted by 4K Mastere to work on existing Blu-ray players. Users can play them on an existing player and watch them on a 4K Ultra HD TV, but that doesn't mean you are seeing 4K images.

How about 8K? 4K is being deprecated it?

The resolution of 8K is four times that of 4K, 16 times that of 1080p, reaching 7680 x 4320 pixels or 4320p. Although this may seem difficult to understand, the technology already exists and the manufacturer is ready to invest in the product in just four years. This raises questions about the long-term survival of 4K, as it may become a stepping stone for 8K development, just as 720p is quickly replaced by 1080p. NHK, the national broadcaster of Japan, has been working to promote 8K. At the 2012 London Olympics, the BBC filmed quite a bit of good content in 8K.

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