The Rio Olympics is being held. Although the game is on the other side of the globe, we can still see the competition at the first time when we are at home. This depends on the development of today's perfect live broadcast system and network infrastructure. But whether you watch TV or watch games with mobile phones, tablets, or computers, the resolution stops at 1080 full HD. In fact, the Olympic Games also uses 4K video or even 8K video for live broadcast, and also has live VR. recording. We don't enjoy this because these new things are not yet in the universal stage.
In the video field, pixels are also a very important topic, like we often say 1080p, which means the output standard of 1920x1080 resolution progressive scan. The higher the resolution, the more video we can watch. When manufacturers promote new cameras, they will also use the improvement of pixel standards as a selling point. Therefore, after the popularization of the 1080p standard, the new standards of 4K and 8K are put on the agenda.
4K is a new video specification standard for many new cameras or camcorders. The pixel is 4096x2304, and as the future standard 8K specification, the pixel is 7680x4320. If the video pixel is converted into a single image, then the 1080 standard video single frame is equivalent to 2 million pixel photos, the 4K video standard video single frame is equivalent to 8 million pixels, and the 8K video standard single frame is equivalent to 30 million pixels. . To know that the current mainstream camera is still in the 20 million pixel level, the 8K video standard pixel has surpassed today's mainstream camera. If the 8K video standard can be popularized in the future, then the ordinary camera has no meaning, the video intercepts the single frame. The picture is a photo.
Although high-resolution video specifications are attractive, it is not easy to popularize. Limited by the price of the device itself, as well as the difficulty of communication, it will take a long time to achieve the popularity of 8K video. However, large-scale international events such as the Olympic Games can often see the application of these cutting-edge video technologies. The 8K video standard Olympic broadcast is also used in this sports meeting. In addition, Japan’s 2020 Tokyo Olympics is intended to popularize 4K TV programs throughout the country and to achieve 8K standard broadcasts. And now it is already in the construction of the network stage.
Nowadays, the popular 4K video standard has become popular in many developed countries. The size of a single frame of 8 megapixels is calculated according to the frame rate of 30 fps, which is about 100 M per minute. However, if you want to achieve 8K live broadcast, the data exceeds 30G per minute, so the bandwidth of such high data volume is not supported by the popular network. Therefore, although Japan is confident that it will achieve the 8K standard Olympic live broadcast in 2020, it is very likely that the data will not be smooth when it is transmitted to the terminal.
The difficulty of 8K live broadcast is the bandwidth support during transmission, and the second is the cost problem. Among digital cameras, 8K video is the largest output standard, but as a cutting-edge technology, the price of the product is very high. A set of 8K video cameras capable of performing various shooting tasks requires at least 500,000 yuan. To complete the live shooting of each event, the number of cameras required is a huge number. If all are replaced by 8K video cameras, the total budget will be much larger than the current shooting equipment.
On the other hand, as the output end, although the definition of 8K video is desirable, in fact, there are not many display devices that achieve 8K standard resolution output. Such ultra-high definition display devices are often large-screen display devices for long-distance display. Compared with the indoor display equipment, the outdoor large-scale display should reach the 8K standard, and the cost is even higher.
The 8K video standard is a cutting-edge technology. Whether it is the early data acquisition, remote transmission or terminal output display, it requires huge cost support. Only international events of the size of the Olympics can use such a huge budget to show a new level of technology to the general public. Therefore, we often see the emergence of many new technological elements in sports events such as the Olympics and the World Cup. At this year's Rio Olympics, the broadcast of 4K video standard events has become a reality, and the 8K standard has also been tried. What is the sight of the Tokyo Olympics four years later? We can look forward to it. It is hoped that the live broadcast of the 8K video standard will become the main way of displaying the game.
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