Collect
Check out my collection
0
Useful +1
4K resolution is ultra-high definition resolution. At this resolution, the viewer will be able to see every detail in the picture, every close-up. If the cinema adopts 4096×2160 resolution, no matter where in the cinema, the audience can clearly see every detail of the picture.
4K resolution refers to horizontal direction per line
Pixel value
At or near 4096, regardless of frame ratio. Depending on the range of use, 4K resolution also has a variety of derived resolutions, such as Full Aperture 4K 4096×3112, Academy 4K 3656×2664 and UHDTV standard 3840×2160, all belong to the category of 4K resolution.
- Chinese name
- 4K resolution
- Foreign name
- 4K resolution
- Full title
- 4K pixel resolution
- class
- Ultra HD resolution
- Advantage point
- You can see every detail in the picture
- exegesis
- The horizontal pixel value of each row reaches or approaches 4096, regardless of the frame ratio
4K, the resolution standard for the next generation of Hollywood blockbusters. It is different from the so-called high-definition television we watch at home (1920×1080 resolution), and it is different from traditional digital theaters
2K resolution
The large screen (2048×1080 resolution), but has a 4096×2160 resolution of the hyperfine picture. Traditional HDTV is a 2.07 million pixel picture, while in the traditional digital theater you can see a 2.21 million pixel picture, and in the 4096×2160 resolution theater, you can see a high-definition picture of 8.85 million pixels.
in
Digital technology
The field is usually adopted
Binary system
And the size of the digital image is described by the pixels that make up the image. Because of the large number of pixels that make up a digital image, it is usually represented by K. 2 to the power of 10 is 1024, so: 1K=2^10=1024, 2k =2^11= 2,048, 4k =2^12=4096.
The way to define how many K a video has is: the number of horizontal pixels is how many 1024. In the case of 2048×1080 resolution, 2048 represents the number of horizontal pixels, 1080 represents the number of vertical pixels; Similarly, when the resolution is 4096×2160, 4096 represents the number of pixels in the horizontal direction and 2160 represents the number of pixels in the vertical direction. In the actual digital master production and digital projection, it is necessary to adjust the number of pixels in the horizontal direction or vertical direction according to the different aspect ratio. Therefore, the resolution of 8847360 pixels close to the 4K image can also be called 4K, such as the common 3840×2160 on the market can also be called 4K resolution. The standard 4K resolution is exactly four times the number of 2048×1080 pixels of 2K resolution, and 16 times the number of 1024×540 pixels of 1K resolution.
"Definition" is not equal to "standard", a standard can only be applied in a certain range, there is no universal 4K resolution standard in any field in the world, but no standard does not mean that you can not follow the standard, such as computer monitors are mostly following the TV standard, but there are monitors that do not follow the TV standard.
4096×2160 is promoted by the Digital Cinema Initiative (DCI), which includes Disney, Twentieth Century Fox, Metro-Goldwyn-Mayer, SONY Entertainment, Universal, Warner Bros. and others.
DCI Digital Cinema System Specification (DCSS, Digital Cinema System Specification) clearly stipulates that digital film distribution master (DCDM) should use a hierarchical image structure, that is, it supports both 2K/4K image formats. 2K/4K Digital Movie Packet (DCP) can be decoded and digitally projected on both 2K/4K cinema playback server and 2K/4K digital projector.
The 4096×2160 resolution delivers more than 8.8 million pixels for cinema-quality, which is more than four times the current top-of-the-line 1080p resolution. Of course, the cost of ultra high definition is not cheap, the amount of data per frame has reached 50MB, so whether decoding playback or editing requires a top configuration of the machine.
The 1920×1080 resolution can display an effective pixel of 2,073,600, the Quad Full HD can display an effective pixel of 8,294,400 (3840×2160), and the 4096×2160 resolution can provide a display quality of nearly 10 million pixels, and the display delicacy is more than 4 times that of 1080p. 4K Resolution is an emerging resolution standard for digital movies and digital content, and the name 4K comes from its horizontal resolution of about 4000 pixels (pixel). Common 4K resolutions in the film industry include Full Aperture 4K (4096×3112), Academy 4K (3656×2664) and many other standards.
In most cases, 4K ultra HD digital movies refer to digital movies with a resolution of 4096×2160, that is, there are 4,000 pixels horizontally. Most of the domestic digital movies are 2K, the resolution is 2048×1080, and some digital movies are 1.3K (1280×1024), while the so-called rural movies are 0.8K (1024×768). A true 4K movie is shot with a 4K camera and projected with a 4K projector. Other 4K movies are shot on 35mm film and converted to 4K digital format. Since the resolution of film movies is roughly equivalent to or slightly better than 4K, the clarity of the film can be guaranteed after transcription. For mainstream home appliance manufacturers, they are more inclined to manufacture Quad Full HD (3840×2160) devices, because the display ratio of this resolution standard is 16:9, which is closer to the current viewing ratio accepted by consumers.
In the 1990s, The American Society of Motion Picture and Television Engineers "Digital image hierarchy structure" task force has studied the spatial resolution requirements of imaging systems. The group divides the display into four levels from the perspective of resolution: low resolution (less than 0.8K), regular resolution (less than 2K), high resolution (2K) and ultra-high resolution (4K or even higher). The team proposed a spatial resolution hierarchy based on the following basic concepts:
- I level integer progression based on common digital processing and storage architectures;
- Support for various aspect ratios and spatial resolutions based on image tiles;
- The ability to build a display for any application with a suitable: E resolution patch, by using the patch and only four resolution levels, it is possible to build a new display for any purpose, and this display can also be used to display images from any other level.
The United States Digital Cinema Organization (DCI) requires that the resolution of digital cinema projection systems be 4K or 2K, which is an ultra-high resolution or high resolution level.
In fact, the current projection or high-end large-size TV has met the display effect of 4K resolution movies. And from the film material, the current is generally 35mm film shooting material, in theory has reached this requirement (in fact, it is difficult, should choose 70mm film), but there are still too many factors to limit the popularity of 4K film.
Not only the players in the current home, but the projection equipment in many movie theaters mostly stays at the level of 2K resolution. Most 4K resolution playback devices are expensive, which is the most important reason.
According to the common definition of 4K resolution, 4K resolution means that the horizontal pixel value per row reaches or is close to 4096 although it is called 4K resolution, Therefore, a variety of standards such as Full Aperture 4K (4096×3112) and Academy 4K (3656×2664) make it difficult to achieve unity of products produced by manufacturers, which also hinder the popularity of 4K.
At present, we still commonly use 35mm Film to shoot Negative Film Stock, and its resolution is 4K, to the release copy (Film Print) 1K digital HD theoretically can reach 2K clarity, such clarity should not be able to meet the requirements of 4K projection. The only solution is to switch to 70mm film, but that will have to wait for the industry as a whole to improve.
The current popular Blu-ray disc has basically reached the storage limit of 1920×1080 movies, and the size of 4K movies will reach four times that of 1080p with the same aspect ratio, which will bring new challenges to the movie distribution medium, but the current Blu-ray disc that supports higher and larger storage has been successfully developed and is not far away from the market.
The current hot broadcasts in digital theaters are basically from Hollywood, so Hollywood has an absolute say in the shooting and broadcasting standards of movies. Purely from a technical point of view, the highest level of 4K film resolution is 4096×2160, the total pixel more than 8 million; Domestic digital film projectors are popular 2K level, 2048×1080 resolution; Of course, there are also some towns and mobile projection vehicles using 1.3K projectors, 1280×1080 resolution. The picture of the 2K projection is very close to the current FULL HD standard 1920×1080, but the aspect ratio is more biased to the screen ratio of the movie. In order to meet the movie theater playing environment, the digital movie files released are 2K and 4K compatible (do not use Blu-ray for example, the size of these digital movie packages are hundreds of GB, the quality is far from the fine Blu-ray), about one-third of the current Hollywood digital movies released are 4K resolution. If you use a 2K-rated projector, then the audience will only see the content in 2048×1080 resolution, compared to the original 4K resolution of the blockbuster, the number of pixels is four times more.
According to the current statistics of China's color TV market, 4K ultra HD TV about 9 brands, including Samsung, TCL, LG, Changhong, Skyworth, Konka, SONY, Haier, Hisense, more than 15 series of products, has been sold in the market 4K ultra HD TV nearly 100 models, product size covers 39 inches to 84 inches.
[1]
In January 2022, according to the official website of the Ministry of Industry and Information Technology, recently, the Ministry of Industry and Information Technology, the Central Propaganda Department and other six departments jointly issued the "Hundred cities and Thousand Screens" activity Implementation Guide (hereinafter referred to as the "Guide"), requiring the transformation of domestic large screens into 4K and 8K ultra-high-definition large screens through new or guided transformation, and rich ultra-high-definition video and audio service scenes. Accelerate the integration and innovation of ultra-high-definition video and audio in many aspects, and give birth to new technologies, new formats and new models.
[2]
2014 FIFA World Cup Brazil
For the first time, three major matches will be broadcast with 4K ultra-high-definition signals, including the final on July 13. It is reported that the definition of the latest 4K technology can reach 4 times the existing 1080p high-definition resolution, which can be described as tiny, so it will be able to give fans a more realistic viewing experience.
However, in order to watch 4K shows, users need to get one first
4K TV
Such products are generally expensive and far from popular. So FIFA wants to set up large screens in public areas such as city squares to show 4K video of matches. However, please note that the 4K broadcast footage will only be recorded in China and will not be broadcast abroad. Even fans with a 4K TV at home won't be able to see the game live in 4K.
Following the LCD TV, high-end monitors are also gradually equipped with 4K resolution ultra-clear screens to achieve more detailed display effects. However, 4K resolution applications seem to be a bit wasteful on a 16:9 screen of about 28 inches, so some manufacturers are also using other forms to make 4K more valuable, and the ultra-wide ratio seems to be a solution.
Super wide display It usually uses a 21:9 display ratio, the screen is wider, can better display multiple desktop Windows, including LG and other manufacturers have launched 2K level products.
