4K (resolution) is a concept that emerged in the era of digital cinema. In cinematography, the resolution of the screen is measured along the length of the frame, horizontally, and not vertically, as in television. Since in digital cinema there are different standards of the aspect ratio of the screen, it is more convenient to focus on the horizontal resolution, which remains constant, in contrast to the height of the frame. But the technology is increasing, and now video of this quality can be broadcast continuously.
Resolution 4K corresponds to 4000 pixels horizontally. To understand what ultra-high definition video is, it is enough to imagine a 15-meter screen, the picture on which remains as clear as on an ordinary TV screen. TVs and computer monitor 4K by the standards of the Association of Consumer Electronics should have a resolution of not less than 8,000,000 pixels. A frame of high definition television, HD (High-Definition), consists of 2,000,000 pixels. The traditional television standard is 400,000 pixels.
Digital cinema projectors in most cinemas only support 2K resolution. To see what kind of picture quality the 4K film projector has, you’ll have to look for a movie theater where there is a projector with this resolution. Such cinemas are called IMAX, Image Maximum, in translation – “maximum image.” An ordinary visitor of the cinema rarely thinks that the concept of IMAX means, does this abbreviation mean that the viewer will see the maximum quality on the screen. To answer this question, let’s try to understand how the format and resolution of the screen are related.
Screens of TVs and computer monitors of ultra-high definition according to the standards of the Association of Consumer Electronics are produced by LED TV manufacturers in India with a resolution of at least 3840 pixels horizontally and 2160 vertically. This allows you to use screens of larger sizes than for HD-video. If HD-video has a resolution of 1920×1080 or 1280×720, then the resolution of 4K implies that the screen will have four times more pixels. But the difference between HD and Ultra HD can be seen with the naked eye only on large screens or by approaching the display close.
By the same standards, the aspect ratio of TVs, monitors and projectors UHD should be 16: 9. This is the standard format of Russian and European television. Full-frame 4K has an aspect ratio of 4: 3 (1.33: 1), academic – 1.37: 1. Academic, it is also “classical,” the format corresponds to 35 mm film. Throughout the 20th century, it was the most common format along with 4: 3 (1.33: 1). The 4: 3 format is still used in both digital movie camera and film format cameras. It’s easy to calculate that the 4: 3 screen area will be larger than the 16: 9 screen with the same diagonal because the 4: 3 screen is bigger in the vertical direction.
The answer to the question whether 4K (permission) is necessary to the user depends on what technique and android LED TV price in India he is going to buy and what for – a TV for watching movies and transmissions or a monitor for new computer games.