Digital cinema enters the 4K era-XY Screens-img

Digital cinema enters the 4K era

by:XY Screens     2021-09-02
At present, the representative of mainstream computer-aided design blockbusters. Starting from Avatar, 3D movies have brought a wave of trends. Until recently, Kung Fu Panda 2, without exception, became the focus of attention of many movie fans at that time, even some People who rarely walk into the theater are also swept into the theater by the wave of 3D. Indeed, such a large-screen 3D picture, exquisite production effects and well-arranged plot are indeed a visual and sensory enjoyment. 4K is the resolution standard for a new generation of Hollywood blockbusters. It is different from the so-called high-definition TV (1080P, 1920×1080 resolution) we watch at home, and it is also different from the large 2K resolution screen (2048×1080 resolution) of traditional digital cinema, but has a resolution of 4096×2160. Super fine picture. To use a simple analogy: the HD TV you see at home has a 2.07 million pixel picture, while in a traditional digital cinema, you see a 2.21 million pixel picture. In a 4K cinema, you can see 8.85 million pixel high. Clear picture. Which is better or worse, you can tell at a glance.   But today, the movies we can see in China are basically in a state of 'non-three non-four'. You know, in the Twelfth Five-Year Plan, the number of digital cinema screens in the country will increase to 20,000, most of which are 4K screens. This not only means that the era of traditional film movie playback is basically over, but also announced that digital cinema has entered In the new era, the era of 'no three no four' is about to pass.  Hollywood Standard   Currently, most of the blockbuster films that are broadcast in digital cinemas, and most of these blockbuster films are from Hollywood, so Hollywood has the absolute right to speak on the filming and broadcasting standards. From a purely technical point of view, the highest-level 4K movie has a resolution of 4096×2160, with a total pixel size of more than 8 million; the current domestic digital movie projector is at the 2K level, with a resolution of 2048×1080; of course, there are also some villages and towns. And the mobile projection car uses a 1.3K projector with a resolution of 1280×1080. Among them, the 2K screen is very close to the current full HD FULL HD standard 1920×1080 of high-definition TV, but the aspect ratio is more biased towards the screen ratio of movies. In order to satisfy the theater playing environment, the digital movie files released are all compatible with 2K and 4K. Far from being comparable to Blu-ray). Currently, about 1/3 of the digital movies released in Hollywood are in 4K resolution. If you use a 2K-level projector to show them, the audience can only see 2048×1080 resolution content, compared to the original blockbuster movies. The 4K resolution is 4 times different in the number of pixels. When using a 2K projector to watch a movie, you should sit in the middle and back row so that you don’t feel dizzy. When using a 4K projector, we can choose the middle and front position to better feel the impact of the big picture, but not There is dizziness. The reason is very simple. The actual screen pixel size is very large at 2K. It is too close to see the pixels, as if looking at the world through a sieve, destroying the perception of the image; and the 4K projector even has a 20-meter-wide screen. The pixel is only 0.5 cm, and you can sit at the same height as the screen and watch the extremely clear picture, which really feels 'creepy'.  4K movie technology advancement  From a technical point of view, 4K cinema brings 4 times the clarity. But in terms of the audience's feelings, it is not just as simple as improving the clarity. Because it can show more details, more subtle light and shadow and color changes, 4K movies can let the audience see more things, and truly restore the intentions of the director and the producer-because many directors are currently using the 4K process. Shoot and make your own movies.  In developed countries such as Europe, America and Japan, 4K film sources and playback have become common. Major theaters in the United States have decided to use 4K projectors across the board. As the most important supplier of 4K projectors, Sony has installed more than 9,000 4K projectors worldwide. From the first 4K projector to today, Sony has gradually matured in 4K projectors. The current 4K models are 20% more expensive than similar 2K models. From the manufacturer's point of view, the greater the production volume, the lower the product cost. From the projector's point of view, the cost is getting closer and closer to 2K equipment. And for digital cinema, upgrading to 4K has no other cost increase for the cinema. Although in content production, the production process of 4K movies currently uses a large number of 35mm film to be shot and scanned into digital files, Sony has just released the new 4K top digital camera F65 that enables 4K movie shooting to be digitized, with a total number of 2,000 pixels. The CMOS imaging device with 8K pixels in the horizontal direction achieves the shooting effect of 65mm film. Completed the 4K digital process from shooting, production to playback. The non-flickering era of 3D  In fact, starting from the first sensational Avatar, 3D movies have made 3D eyes known to everyone, and the cinema has prepared 3D glasses for every audience. The most common ones in domestic theaters are active shutter glasses and passive spectral separation glasses. The left and right eye images are played quickly in turn during 2K stand-alone screening, and the left and right eye images are separated by fast switching of the shutter or different bands of the spectrum. However, sensitive people can still feel the slight flicker unique to this time-lapse projection, and the light utilization rate is low, and the picture is dark.
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