Modern home security technology involves intrusion alarms, fire alarms, video surveillance and other fields. The video surveillance system has been widely used because of its intuitiveness, convenience, and rich information system. As one of the important components of security defense, video surveillance has a strong comprehensive prevention capability. It has developed rapidly with the development of computer processing power, network bandwidth, transmission technology, image data storage capacity and image processing technology. .
Video surveillance technology was introduced in the United States in the 1980s. Later, the technology was introduced into China. China is one of the countries that used micro-processing in video surveillance technology earlier. At present, China's research and application in this technology field has reached international standards. Advanced level. Compared with the traditional multimedia monitoring system, the new intelligent home monitoring system has the characteristics of small size, low cost and high stability, and has strong practical application value.
Home security monitoring system features
1. System specificity
2. Dedicated compact, limited system resources
3. Closer integration of multiple technologies
4. Diversity
The core of the security monitoring system is the hardware unit that controls and operates the auxiliary system. The range is extremely wide, from the original 4-bit processor, 8-bit microcontrollers that are still in large-scale applications, to the recently popular 32/64-bit embedded CPUs.
Monitoring system related technical analysis
Wireless sensor networks (WSN) integrate sensor technology, embedded computing technology, modern network and wireless communication technology, distributed information processing technology, etc., and can realize real-time monitoring, sensing and acquisition through various integrated micro sensors. Information of various environments or monitored objects, which are transmitted wirelessly and transmitted to the user terminal in a self-organizing multi-hop network, thereby realizing the connectivity of the physical world, the computing world, and the ternary world of human society.
Zigbee is an emerging short-range, low-rate, low-power wireless network technology, which is a technical proposal between wireless tag technology and Bluetooth. ZigBee technology is dedicated to providing a low-cost wireless communication technology with extremely low complexity, cost and power consumption for inexpensive fixed, portable or mobile devices.
The MPEG-4 standard integrates a wide range of multimedia applications into a complete framework designed to provide standard algorithms and tools for multimedia communications and application environments to create a unified data that can be commonly used in multimedia transmission, storage, retrieval and other applications. format. Its transmission rate requirement is low, between 4800 and 64000 bits/sec, and the resolution is 176×144. MPEG-4 uses less bandwidth to compress and transmit data through frame reconstruction techniques to achieve better image quality with less data.
Family Security Monitoring System Requirements Analysis
The functional requirements of the home security monitoring system mainly include home networking functions, scene control functions, real-time network functions, and video storage playback.
Functional needs target:
1. You can view live video in your home at any time through the web client software or IE page.
2 can remotely control the PTZ multi-angle viewing video
3. Various commands can be sent to the home monitoring server through the client software to control various home appliance nodes.
4. Users can set recording strategy timing recording
Non-functional requirements target:
1. Have a good human-computer interface
2. The system consumes less power and works stably.
3. Easy to upgrade and maintain
Conclusion <br>
Compared with the traditional multimedia monitoring system, the functional modules of the intelligent home security monitoring system can be better integrated and compatible, and the predetermined goals of the system are better achieved. At the same time, it has the characteristics of small size, low cost and high stability, and has strong practical application value.
With the development of computer network technology, embedded system technology, multimedia technology and sensing technology, the home monitoring system has gradually turned to the image processing as the core digital communication monitoring system that integrates network, sensing and communication technologies. In today's "Internet of Everything", digital, multimedia, networked, intelligent embedded home monitoring system will be an inevitable development trend.
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