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The video surveillance system is an integral part of the safety guard system, with its intuitive, convenient, abundant information is widely used in many occasions. In recent years, with the rapid development of computer, networking and image processing, transmission technology, video surveillance technology have made great progress. Judging from the current trend, the biggest two characteristics of the development of video surveillance is digitized and networked. Most video surveillance systems are based on the PC, the high cost, stability is not good enough, and embedded systems based on the demand developed hardware system is relatively cheap, easy to install, easy to implement the system's modular design, easy to manage. The system into the DSP chip video information to be handled, embedded processing systems and video information processing module in parallel mode to the implementation of video surveillance systems, the video surveillance system can be widely used for remote video surveillance, intelligence community, and a series of civilian areas. In this paper, the video surveillance system based on DSP as the processor, the video signal input camera CCD DSP processor, video codec processor, and then transmitted to the network port of the DSP video surveillance equipment video surveillance equipment, surveillance images preservation and access. Firstly, a detailed study of the campus monitoring system used by the network structure and the realization of the program, carried out a detailed analysis of the coding technology, hardware and solutions used in the chip and network protocols. The main function modules and data flow in hardware design sub-module design, a detailed analysis of the data flow of the system to calculate the technical specifications of the monitoring system from the three aspects of data entry, data processing and logic control. The system used in the data input module video capture chip SAA7111A, CPU use of the TMS320DM642 video decoding of multi-channel video capture input channel single-CPU program, using CPLD logic implementation. EXpressDSP RF5 reference model in the system software part of the thesis is based on TI's third-party software, in accordance with the model of the system processes the entire system is divided into image acquisition, image compression, network transmission three parts were designed. Finally, the system set up to test the network test, the test results show that the software and hardware of the H.264 network video terminal act in harmony, on-demand clear picture, sometimes pause screen with some delay, jitter, basically meet the requirements of the system design.
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