China is one of the few countries with the most serious natural disasters in the world. There are many types of natural disasters in China, and the frequency of occurrence is high and the disaster is serious. Therefore, government departments urgently need a very ideal solution for emergency command and dispatch, which can reduce the losses caused by natural disasters. That side Jinan Chenlian Electronics Co., Ltd. analyzes the characteristics of the provincial emergency command video conference system program through the following diagram: The diversity of established video conferencing systems Since there is no unified planning, the video conferencing systems of various cities, departments and affiliated organizations use video conferencing equipment of various brands. In the newly created video conference system, it is necessary to ensure that the above-mentioned original devices are reserved and can communicate normally with the newly built system. Lack of good system compatibility Since 1990, the development of video conferencing protocols has gone through several stages such as H.320, H.321, H.323, and SIP. Due to the advanced technology, functional integrity, and operational convenience of H.323 systems. The system's scalability and cost-performance advantages make the H.323 protocol the mainstream protocol for video conferencing. However, due to the different nature of each organization, such as the public security system, the video conferencing system based on the H.320 protocol was established a few years ago, and most of the current video conferencing systems use the H.323 protocol as the basic protocol. In the future, video conferencing systems may use the SIP protocol as the mainstream protocol. Therefore, in order to avoid waste, it is necessary to utilize the existing video conferencing system and ensure that the original system can be seamlessly integrated into the newly created video conferencing system. Building a high-definition (HD 720P) video conferencing system With the development of video codec technology, video conferencing systems have rapidly entered the era of high definition (HD 720P) from the era of standard definition. In the provincial emergency platform system, the video conferencing system plays an important role in organization and command and dispatch. In the emergency response process, it is often necessary to share the data in the computer to the participants of the conference, and put forward higher requirements on the resolution of the image. In this case, it is especially important to build a high-definition (HD 720P) video conferencing system. Conference organization mode centered on provincial emergency office Centered on the Provincial Emergency Office, the municipal (district, county) people's governments, provincial departments, and affiliated institutions are divided into venues to hold large-scale conferences. For example, coordinate and supervise and inspect the work of the people's governments of various cities (districts, counties) and various departments at the provincial level, coordinate and organize relevant research to propose policies, regulations and planning recommendations for provincial emergency management. Organize information research and publicity training, coordinate exchanges and cooperation in emergency management; direct and direct the handling of emergency emergencies. Conference organization mode centered on emergency scenes When major emergencies, such as sudden epidemics, major environmental disasters, traffic safety, fire safety, and social security incidents, the relevant leaders of the Provincial Emergency Office may visit the incident site for guidance, which may require an incident at the scene and emergency. The staff of the office get in touch, issue orders, and communicate the notice. Therefore, we need to take the leadership as the center and hold a video conference centered on the scene of the emergency. Full-time recording of important meetings and on-demand viewing after the meeting For the handling of major emergencies, the transmission of important documents of the provincial government, and some training and communication work, in order to ensure that it can be saved as information for everyone to review and learn in the future, the video conferencing system must not only have the function of real-time meeting, but also have Record the whole process of the meeting, and save the recorded data and watch it after the meeting. Center venue large screen arbitrary scheduling sub-site screen In order to ensure better handling of emergencies, to achieve better viewing of video conferences, and to increase the feeling of on-site communication, participants can build large screens at the central venue, so that any part of the venue image is displayed on the screen in a high-definition screen. on. Practical principle The system fully considers the practicability of the system to meet the technical requirements and usage requirements of the video conferencing system, and makes the functions of the system as complete as possible and fully utilized. Reliability principle System design, equipment selection, construction and commissioning will strictly implement the quality regulations, fully meet the operational requirements of the system, in line with national and industry standards, to ensure that the system can operate stably, reliably and safely for a long time. Advanced principle In the system design, equipment selection, as well as system stability, reliability, compatibility, scalability and other aspects are in the domestic leading position. Open principle In order to facilitate the use of the user, the system will disclose various communication protocol interfaces. Economic principle On the basis of satisfying the above principles, the economic cost of system construction is considered at the same time, so that the system has a very high cost performance. Principle of operability The system is easy to operate, friendly to human and machine, and easy to maintain. Safety principle The system has the ability to prevent computer viruses, has strong anti-interference ability, and also has automatic recovery function after data backup and power failure. The system also provides users with user level and operation authority, reducing unnecessary interference of human factors on the system. Compatibility requirements Ensure the interconnection between the provincial video conferencing system and the State Council video conferencing system; Ensure the seamless cascading of the provincial video conferencing system and the State Council video conferencing system; Compatible with standard H.323 video conferencing equipment (MCU, terminal, etc.) from foreign domestic manufacturers Support advanced H.264 video format to ensure compatibility with the State Council video conferencing image format Audio and video coding requirements Video coding: support video coding protocol for H.261, H.263, H.264 Audio coding: support G.711, G.722, G.728 standard protocol Bandwidth: 4Mbps or more Resolution: Support CIF, 4CIF and 720P Frame rate: 30 frames / sec Carrier-grade stability and reliability requirements In order to meet the stability and reliability requirements of emergency command, the core equipment of the video conferencing system must meet: Hardware embedded structure design Real-time embedded operating system Dual-system hot standby conference backup mechanism Display performance requirements Large-screen high-definition display, multi-screen output resolution reaches 16CIF, picture frame rate is 25-30fps Ultra-large-scale multi-site screen display capability, up to 80 simultaneous scenes Remote high-definition multi-screen display capability to achieve high-definition multi-screen display at any remote venue
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Provincial and municipal emergency command video conference system program requirements characteristics
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