No conforto de nossa casa, sentado no sofá e assistindo a um filme sem se preocupar em ficar contando pixels, é difícil dizer que há uma diferença. Lower resolution images, such as 1080p HD, can be upscaled on 4K TVs and 4K monitors. 26 October 2020, What is 4K? VP9, a free, open video compression codec developed by Google, was designed to support 4K video streaming with a 50% bandwidth reduction. It first launched on YouTube to support 4K video streaming, and it was officially released in June 2013. A Philips cria uma 3DTV com resolução nativa de 4K UHD. Nick Pino,  Entretanto o player de video do YouTube é limitado ao máximo de apenas 2048 × 1536 (3.1 megapixels). O YouTube permite uma resolução máxima de upload de 4096 × 3072 (12,6 megapixel, com aspecto 4:3). The selection might be more limited than the amount of HD content, but it's increasing day by day. The 4K resolution standard for television and monitors is 3840x2160 pixels. Scott Alexander originally contributed this article. Henry St Leger Pedro Cipoli para o CanalTech publicou uma avaliação negativa dizendo: (…)"Não é o que acontece com o 4K. UHD Premium: a helpful standard, or just confusing? The pixel aspect calculator makes it extremely easy to change any "W:H" format with custom a width or height. Pexels Videos makes it easy to find free stock footage for your website, promo video or anything else. (...) Os fabricantes e os estúdios devem convencer você que a troca vale a pena. 4K screens have about 8 million pixels, which is around four times what your current 1080p set can display. Digital television and digital cinematography commonly use several different 4K resolutions. Please deactivate your ad blocker in order to see our subscription offer, Samsung's new QLED TVs are 4K HDR with insanely high peak brightness levels of up to 2,000 nits, If you have the bandwidth, you can now watch many of Netflix's shows in Ultra HD 4K, 4K UHD screens provide far more detail than HD sets. You'll also find 4K content on Disney Plus, Hulu, Rakuten TV, and other TV streaming services like them – everybody's doing it! 4K Ultra HD, which is also known as 'Ultra High Definition' or simply '4K', is the way we describe the super eye-popping resolution found on 4K TVs. Think of your TV like a grid, with rows and columns. São 3840 × 2160 (8.3 megapixels na proporção 16:9) e é uma das duas resoluções de televisão de ultra-alta definição. 4K adaptive bit rate streams require between 10 Mbps and 20 Mbps of bandwidth. You'll see the term all over in-store televisions, and certainly in a lot of our TV reviews here at TechRadar. OLED – organic light emitting diodes – have been around for some time, but producing big screens using this technology has proven to be prohibitively expensive, something which has so far prevented OLED television from being a mainstream proposition. Atualmente são estudados dois formatos para distribuição de vídeo 4K no formato físico, o Archival Disc e o BDXL (outra versão do disco blu-ray), ambos sem previsão de lançamento. Currently, in order to adhere to the UHD Premium specification a product must have: Samsung and Panasonic are embracing the new standard, with both of their flagship lineups wearing their UHD Premium badges with pride. This question is made harder by the fact that so few TVs aren't 4K these days. HDMI 1.4 connectors support a 3820x2160-resolution at 30 frames per second (fps), while HDMI 2.0 can output video at Ultra HD resolution at 60 frames per second, and HDMI 2.0a is capable of HDR. Receive mail from us on behalf of our trusted partners or sponsors? We're talking about a similar jump in resolution as the one from SD (480 lines high) to HD (1080 lines high). No. 4K TVs do look nice. However, the numerical shorthand looks likely to stick. The 8K standard was, until recently, still primarily for the exhibition market (aka movie theaters).  O VP9 também foi desenvolvido para streaming 4k. That's why a group of companies decided to form the UHD Alliance with the expressed aim of defining what technologies should be included in the next generation of TV sets. Change the image aspect ratio via this Ratio Calculator . To put it another way, you could fit every pixel from your 1080p set onto one-quarter of a 4K screen. 4K UHD é uma resolução de 3840 × 2160 pixels (8,3 megapixels) e é uma das duas resoluções da Televisão de ultra-alta definição (UHDTV). Below you'll find a video outlining 4K in a nutshell, with more information about pixel count, viewing distances, and the difference 4K really makes below that. The speed of your connection, however, will depend on the types of connectors. , Em junho de 2004, a Sony divulgou o primeiro projetor digital 4K para o padrão das telas de cinema comum com resolução 3840 x 2160, e 70 pés (840 polegadas diagonais/20 metros de largura) 2 metros de largura a menos em comparação com o IMAX.. Not everything on the service will jump in resolution, though there's a decent amount of 4K content available – including Dark, Star Trek: Discovery, Altered Carbon, and much more. However, it might not be the raw resolution of 4K that ends up tempting you into your next TV purchase.  A resolução 4K foi recebida com críticas negativas. It might not be native 4K, but we think the results are excellent. Start my free, unlimited access. You won't get 4K on small TVs, for one – it's saved for 40-inch TVs and above, so you shouldn't go around looking for it on sizes smaller than that. Confusingly, an 8K display would also be considered 'Ultra HD'. Until the whole industry unambiguously backs the standard however, we'd still recommend you tread carefully to ensure maximum compatibility. They're certainly gorgeous, though pricing remains high even years after they first came to market – and it's generally accepted that they don't have the longevity of LCD screens. The result of this alliance was the UHD Premium specification announced at CES 2016. More importantly, at that same distance, your eyeballs won't be able to squeeze any more detail out of a 4K image than a 1080 one. Em uma imagem progressiva, as linhas da resolução da imagem vão do topo da imagem até o final. 4K is four times the pixel resolution, or twice the line resolution (2160p), of 1080p (1920 x 1080 pixels). We'll be sure to get 4K gaming on the next-gen Xbox Series X and PS5, too. HDR has also been included in the new Ultra HD Blu-ray standard. This chart shows how close you need to sit at any given screen size to see the difference. Online video streaming service provider Netflix requires an internet connection speed of 25 Mbps or higher to stream 4K content. Seria diferente, não? A TV desajeitadamente reforçava a película para transferir para o digital do filme de uma forma que fez os atores parecerem com os vampiros brilhantes daqueles filmes "Crepúsculo". One issue to consider is brightness, though. Brian Lam, do site TheWirecutter disse que é "impressionante o que se obtém de detalhes em telas maiores. There are two standard resolutions for 4K video. Here’s why. To put that in perspective, a Full HD 1080p image is only 1920 x 1080. 4K refers to one of two high definition resolutions: 3840 x 2160 pixels or 4096 x 2160 pixels. There's no shortage of acronyms in home entertainment, and it can certainly get confusing though. 4K UHD tem o dobro da resolução horizontal e vertical do formato 1080p HDTV, com quatro vezes mais pixels em geral.. Copyright 2008 - 2020, TechTarget High speed cables can do anything higher than 1080i. 4K and ultra HD are used interchangeably; however, ultra HD resolution can refer to resolutions above 4K. Netflix has tiered pricing plans, with 4K films and TV shows becoming available on the Premium tier. Because every 4K frame contains four times the information of HD, 4K content is four times more bulky than regular HD content in terms of its raw file size. Veja prós e contras da nova tecnologia», Eyes-on: Samsung's 82-inch QuadHD & 52-inch Ultra Slim LCD, https://pt.wikipedia.org/w/index.php?title=Resolução_4K&oldid=58494155, Atribuição-CompartilhaIgual 3.0 Não Adaptada (CC BY-SA 3.0) da Creative Commons. Filmes digitais 4K podem ser produzidos, digitalizados ou armazenados em um certo número de outras resoluções dependendo de qual formato de armazenamento é utilizado.. "(…)"Os fabricantes dizem que os consumidores devem comprar modelos 4K para popularizar a tecnologia. O Digital Cinema Initiatives estabeleceu um padrão de resolução de 4096 × 2160 (com proporção de tela de 256:135, aproximadamente 1,9:1) para projeção de filmes 4K. How replacing your file server can be the solution for the new world of hybrid working, Xbox Series X comes with a hidden button which doubles as an IR receiver. You will receive a verification email shortly. Cookie Preferences England and Wales company registration number 2008885. 4K TVs can also display lower-resolution content, such as that filmed in HD, but will 'upscale' to ensure it looks normal on a 4K screen. And what difference does it make to your viewing experience? Want to game in native 4K? Instead, the other cool technologies that are built-in, which include High Dynamic Range (HDR), Quantum Dot and OLED panels, might be what sways your purchasing decision in the end. 4K devices include dedicated hardware, such as a video scaler and image processing algorithms, to increase the pixel count in lower resolution images. Because the images are around 4,000 pixels wide. The Digital Cinema Initiatives standard for 4K resolution in the film and video production industry is 4096x2160 pixels . All rights reserved. We had 4K gaming on the PC for a while before consoles, but the more advanced versions of Sony and Microsoft's gaming machines can certainly compete. The other type of cable you can use is DisplayPort. But if you're sticking with roughly the same size of television, and are used to sitting pretty close, you may not see that much of a difference – especially if you're still mostly watching HD content rather than 4K video. A não ser que você seja um ninja, é claro. The idea then is that if everyone can agree on what features they think UHD should include, then Disney (an example member of the alliance) can produce a movie that Netflix will be able to stream through a Samsung TV, and the eventual image will be exactly what the director at Disney intended. OLED TVs are improving year on year, though, with reduced risk of burn-in and a new 48-inch size looking to make flagship OLED sets that little bit more affordable to average wallets. How many pixels are we really talking about? 2160p é um nome alternativo para 4K UHD, uma resolução usada em produtos UHDTV. Bath Here's a video outlining 4K in a nutshell, with more information about pixel count, viewing distances, and the difference 4K really makes below that. To view 4K resolution content, a 4K TV or 4K monitor is required. If you're sitting there thinking that all these new technologies and acronyms sound confusing, you'd be right. We're starting to see commercial 8K televisions come to market, though they'll cost you – and there isn't much in the way of 8K content to truly recommend them. There are two standard resolutions for 4K video. Imagine Hollywood e fabricantes como Samsung, LG e Sony em um esforço conjunto para a diminuição de preços dos aparelhos e criação de conteúdo em 4K. , Em junho de 2012, a Toshiba lança a primeira TV 3D sem uso de óculos com 9 imagens paralaxe.
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