The problems of traditional analog intercom systems are mostly concentrated in the networking part. In the interior part of the building, the quality of audio and video has been recognized by most users. The mainstream manufacturers have handled the building well and accumulated. A lot of experience. The design and development of the semi-digital system is based on these advantages and disadvantages of the
Analog System, targeted development of the next-generation
Video Intercom System. The building is still using mature analog technology, while the networking part is using the mature TCP/IP networking technology. The main features of the semi-digital system are as follows:
1. The traditional analog bus is used in the residential building and in the entrance line of the residential area. Since the distance within the building is limited, the audio and video quality of this part can be well guaranteed, and this part of the technology is relatively Mature, easy to form a stable system.
2. The cell networking part adopts the TCP/IP digital transmission, which solves the problem that the image and sound caused by the analog system's transmission distance are easily interfered with. At the same time, the number of audio and video channels is no longer limited by the analog bus, and it can be ensured that the cell networking part is not Again, due to lack of capacity, there is a busy situation. After the adoption of TCP/IP technology, the previous simulation system was able to cost-effectively release information, store images, and record messages, which could be easily implemented on the system.
3, the performance of the simulation system's low-cost advantages, at the same time in the networking part has also obtained the advantages of digital systems, performance has been greatly enhanced, high cost performance.
4. The cost is similar to the analog system. The audio and video quality can be compared with the digital system completely. In some large-scale communities, the cost will be more advantageous than the traditional analog system, and the function will be much stronger than the analog system.
5. Due to the adoption of mature TCP/IP switching technology, the star structure and the use of optical fiber can effectively avoid the damage caused by lightning strikes. The networking part is more stable and reliable, and the maintainability is greatly enhanced.
6. It is easy to solve the problem of setting up the multi-level management center of a large-scale community and selecting the location of the management center.
October 12, 2022
