According to the information released by the State Administration of Radio and Television, CCTV will be shut down from June 15, 2020 and completed before August 31. In case of special circumstances, it will be shut down before December 31, 2020 after being approved by the State Administration of Radio and Television. Local stations that have realized digitalization will also be closed on June 15, 2020, and will be closed before December 31, 2020. Local stations that have not realized digitalization will also be closed on March 31, 2020.

 

So after March 31 next year, all analog TV signals will be completely shut down across the country.

 

 

 

Some computer users may have watched analog TV for half their life, but they still don't know what analog TV is.

 

The simplest way to judge whether the TV is digital or analog is to look at the fault picture. When the digital TV signal is poor, there will be mosaic, card screen and other situations, while the analog TV is a snowflake screen, interference pattern and white track. The common snowflake video special effect is to simulate the failure effect of analog TV. Therefore, the snowflake screen of analog TV has become a synonym for video failure.

 

The reason why analog TV is called analog TV is that the whole process from sending analog signals to displaying pictures on the TV screen is completed under the analog system. Analog signals transmit TV image signals through the amplitude of the vertical direction of the fluctuation, not the 0 and 1 of digital TV. Compared with stable digital TV, analog TV often has problems such as poor stability, easy interference, color distortion, uneven brightness, flicker, low definition, etc. Analog TV can effectively solve these problems no matter how to improve the hardware.

 

So around the 1980s, digital TV appeared in Germany. The most obvious feature of digital TV is that it comes with a set-top box, and the received signal is not analog signal, but data formed by binary number coding. It is as stable as the network, and its bandwidth is much stronger than analog TV, so it can provide clearer and brighter TV pictures.

 

Although the analog TV signal has been turned off, you should not worry that friends in remote areas will not be able to watch TV. Digital TV has not only cable transmission, but also satellite reception, which is commonly known as "village to village" and "small pot". For remote areas, you can use satellite TV reception to watch TV, and you can also enjoy the same high-definition pictures as cable TV. However, compared with ordinary cable TV, it lacks interactive functions, and still shows me for you. This is also the limitation of the current digital TV uplink, which requires network connection to realize these functions.

 

Analog TV is an outdated technology after all, and will be replaced by more excellent technology. I wish technology can bring more convenience to our future life.