What does 4K resolution mean?

4K resolution means that the pixel value of each row in the horizontal direction reaches or is close to 4096, regardless of the aspect ratio; 4K resolution is an ultra-high-definition resolution. 4K resolution has various derivative resolutions, such as Full Aperture 4K’s 4096×3112, Academy 4K’s 3656×2664, and UHDTV standard 3840×2160, etc., which all fall into the category of 4K resolution.

The operating environment of this tutorial: Windows 7 system, Dell G3 computer.

What does 4K resolution refer to?

4K resolution is an ultra-high definition resolution. At this resolution, viewers will be able to clearly see every detail and every close-up in the picture. If the theater adopts 4096×2160 resolution, the audience can clearly see every detail of the picture no matter where they are in the theater.

4K resolution means that the pixel value per row in the horizontal direction reaches or is close to 4096, regardless of the aspect ratio. Depending on the scope of use, 4K resolution also has various derivative resolutions, such as Full Aperture 4K’s 4096×3112, Academy 4K’s 3656×2664, and UHDTV standard 3840×2160, etc., all of which are 4K resolutions. category.

Technical Principle

4K, with the resolution standard of the new generation of Hollywood blockbusters. It is different from the so-called high-definition TV (1920×1080 resolution) we watch at home, and also different from the 2K resolution large screen (2048×1080 resolution) of traditional digital cinema, but an ultra-high definition TV with 4096×2160 resolution. Detailed picture. A traditional high-definition TV has a 2.07-million-pixel picture, while in a traditional digital cinema you can see a 2.21-million-pixel picture. In a theater with a resolution of 4096×2160, you can see a high-definition picture of 8.85 million pixels.

In the field of digital technology, binary operations are usually used, and the size of a digital image is described by the pixels that make up the image. Due to the huge number of pixels that make up a digital image, it is usually represented by K. The 10th power of 2 is 1024, so: 1K=2^10=1024, 2K=2^11=2048, 4K=2^12=4096.

The way to define how many K a video has is: how many 1024 horizontal pixels there are. When the resolution is 2048×1080, 2048 represents the number of pixels in the horizontal direction, and 1080 represents the number of pixels in the vertical direction; similarly, when the resolution is 4096×2160, 4096 represents the number of pixels in the horizontal direction, and 2160 represents the number of vertical pixels. The number of pixels in the direction. In actual digital mastering and digital projection, the number of pixels in the horizontal or vertical direction of the image needs to be adjusted according to different aspect ratios. Therefore, a resolution close to 8847360 pixels of a 4K image can also be called 4K. For example, the common 3840×2160 resolution on the market can also be called 4K resolution. The standard 4K resolution is exactly 4 times the number of pixels of the 2K resolution of 2048×1080, and 16 times the number of pixels of the 1K resolution of 1024×540.

Display frequency

The resolution of 4096×2160 can provide more than 8.8 million pixels, achieving movie-level picture quality, which is equivalent to the current top-level More than four times the resolution of 1080p. Of course, the price of ultra-high definition is also high. The amount of data in each frame reaches 50MB, so whether it is decoding, playing or editing, it requires a top-level machine.

1920×1080 resolution can display effective pixels of 2,073,600, Quad Full HD can display effective pixels of 8,294,400 (3840×2160), and 4096×2160 resolution can provide display quality of nearly 10 million pixels. The display resolution is more than 4 times that of 1080p. 4K resolution (4K Resolution) is an emerging resolution standard for digital movies and digital content. The name 4K comes from its horizontal resolution of approximately 4,000 pixels. Common 4K resolutions in the film industry include Full Aperture 4K (4096×3112), Academy 4K (3656×2664) and other standards.

4K ultra-high-definition digital movies in most cases refer to digital movies with a resolution of 4096×2160, which means there are 4,000 pixels in the horizontal direction. Most digital movies in China are 2K, with a resolution of 2048×1080, and some digital movies are 1.3K (1280×1024), while the so-called rural movies are shown in 0.8K (1024×768). A true 4K movie is shot by a 4K camera and projected with a 4K projector. Some 4K movies are shot on 35mm film and then converted into 4K digital format. Since the resolution of film movies is roughly equivalent to or slightly better than 4K, the clarity of the movies can be guaranteed after dubbing. For mainstream home appliance manufacturers, they are more inclined to manufacture Quad Full HD (3840×2160) equipment, because the display ratio of this resolution standard is 16:9, which is relatively close to the viewing ratio currently accepted by consumers.

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