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With the continuous changes of the times, the campus broadcasting system has become more and more mature, from the high-pitched noise of the early large-horn speakers to ten to ten; to the current point-to-point addressable system or multi-campus Connected networked broadcasting system. The campus is also full of boring ringing tones that can only be heard in the early classes, and now melodious light music flying all over the sky. Time-filled music adds a beautiful landscape to the solemn campus.
At present, the relatively high-tech and cutting-edge campus broadcasting system is the non-addressable system and the networked system. These two systems have their own advantages and disadvantages and are suitable for different occasions. The following are described separately:
First let us look at the addressable broadcasting system. The working principle of this system is to change the original fixed point (partition) into a point that can be flexibly changed according to the actual situation of the school through coding, so that point-to-point control can be achieved. So that in the control room can be arranged to play different music for each zone, the program source varies from several to more than 10 kinds, which can basically meet the daily use of the school. The advantage of this system is that there are more partitions, which can meet the school's independent control requirements for each classroom, and the wiring can be selected from ordinary speaker wires, Category 5 wires and coaxial cables, which is convenient and simple. investment.
Let us take a look at another set of networked broadcasting system, the working principle of this system is very different from the previous addressable system. As the name implies, it is a digital system for transmitting signals through the network. Its biggest feature is interactivity. Not only can the host room control the music played in the extension room, but the extension room can also select programs for other computer rooms (of course, high priority) In the host room), which has changed the tradition of broadcasting systems that can only distribute music to partitions in the host room for decades, and incorporates the cutting-edge features of the network, can coexist with the local area network, and can achieve remote control and switch on and off . The biggest advantage of this system is that it is suitable for long-distance transmission and can be directly used with optical fiber. Now there are more and more universities on multiple campuses. Through this system, you can realize the mutual relationship between different campuses of the same university, breaking the geographical limitation.
In summary, the two systems each represent different functions and ranges of use, creating a new pattern for the campus broadcasting system and establishing that China's broadcasting system is at the world's leading level. I believe that in the near future, they will have their footprints all over the world.