The Rio Olympics is being held. Although the game is on the other side of the earth, we at home can still see the game for the first time. This depends on the development of today's perfect live broadcast system and network infrastructure. But no matter whether you are watching TV or watching the game on your mobile phone, tablet, or computer, the resolution stops at 1080 Full HD specifications. In fact, this Olympic Games also uses 4K video or even 8K video for live broadcast of the event, and VR live broadcast. recording. We cannot enjoy these because these new things have not yet reached the stage of popularization.
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 scanning. Higher resolution means that we can watch higher definition video. And when manufacturers promote new cameras, they will also use pixel standards as a selling point. Therefore, after the popularization of the 1080p standard, the new standards of 4K and 8K will be put on the agenda.
4K is a new video specification standard that many new cameras or camcorders are now selling points. The pixel is 4096x2304, and as the future standard 8K specification, the pixel has reached 7680x4320. If the video pixels are converted into a single image, then the 1080 standard video single frame is equivalent to 2 million pixel photos, the 4K video standard single video frame is equivalent to 8 million pixels, and the 8K video standard single frame is equivalent to 30 million pixels . You should know that the current mainstream cameras are still at 20 million pixels. The pixels of the 8K video standard have surpassed today's mainstream cameras. If the popularity of the 8K video standard can be achieved in the future, then ordinary cameras will have no meaning. The video captures a single frame The screen is a photo.
Although high-resolution video specifications are attractive, it is not easy to get popular. Limited by the price of the device itself and the difficulty of dissemination, it will take a long time to achieve the popularity of 8K video. However, large-scale international events like the Olympic Games can often see the application of these cutting-edge video technologies, and the Olympic Games broadcast of the 8K video standard is also used in this Games. In addition, Japan ’s 2020 Tokyo Olympics intends to popularize 4K TV programs throughout the country and achieve 8K standard game broadcasting. And now it is already in the stage of network construction.
The increasingly popular 4K video standard has already begun to be popularized in many developed countries. The size of a single frame of 8 million pixels is calculated at a frame rate of 30fps, with a flow rate of about 100M per minute. However, if you want to achieve 8K live streaming, the data exceeds 30G per minute. Such a high data bandwidth is not supported by the currently popular network. Therefore, although Japan is very confident that the 8K standard Olympic live broadcast will be achieved in 2020, it is very likely that the data will not be smooth when it is transmitted to the terminal for playback.
The biggest difficulty of 8K live broadcasting is the bandwidth support during transmission, followed by various cost issues. Among the current digital cameras, 8K video is the largest output standard, but as a cutting-edge technology, the product price is very high. A set of 8K video cameras that can complete various shooting tasks requires at least 500,000 yuan. The number of cameras needed to complete the live shooting of each event is a huge number. If all are replaced with 8K video cameras, the total budget will be much more than the current shooting equipment.
On the other hand, as the output, although the clarity 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 indoor display devices, if the outdoor super-large display screen reaches the 8K standard, the cost will be higher.
As the cutting-edge technology, 8K video standard requires huge cost support for early data collection, remote transmission or terminal output display. Only an international event of the scale of the Olympic Games can use such a huge budget to show a new height of technology to the general public. So often in sports events like the Olympics and the World Cup, we can see the burst of many new technological elements. 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. We can look forward to what the Tokyo Olympics will be like in 4 years. It is hoped that the live broadcast of the 8K video standard will become the main way of displaying the game.
The Bluetooth wireless speaker is the terminal of the entire audio system, to convert the audio energy into corresponding sound energy and radiate it into the space. Bluetooth speakers usually consist of speaker, crossover, cabinet, sound absorbing materials and so on. Bluetooth speaker is a device that converts audio signal into sound. In general, it means that the main body of the speaker or the subwoofer box has its own power amplifier. After the audio signal is amplified, the sound is played back by the speaker itself, making the sound louder.
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