Design And Implementation Of Video Monitor System Based On FPGA+DSP Architecture

With the rapid development of digital video and signal processing technology, video monitoring system has already developed from security field into industrial, transportation, education, military, entertainment and other aspects. A wide range of applications of video monitoring technology put forward higher requirements. Modern video monitor technology is faced with the huge challenges of equipment small in size, low power consumption, processing of large amount of data and video processing algorithm complex and flexible application. Used structure of the video monitoring system has been gradually has no way to meet the performance now.Along with large scale integrated circuit technology and nanome ter microelectronics technology increasingly advanced, the performance of FPGA is getting stronger and stronger, more and more low cost and more and more rich resource. Due to video monitoring system which is based on FPGA processing data can be used for parallel computing, not only greatly improving video image processing speed, but also making the system design implemented diverse, less time consuming and low development costs just because of the expansion of the FPGA ha ving the rich interface, powerful ability and programmable characteristics.DSP digital signal processing ability is becoming more and more powerful. With the use of characteristics of the FPGA parallel algorithm can realize the hardware implementation in large amount of data but simple structure. With the use of flexible DSP software programming can implement the task more complicated algorithms and can cooperate with FPGA and DSP. The main job of FPGA is digital video acquisition, caching, and preprocessing. DSP’s main work is further complicated the realization of video image processing algorithm. Their advantages can be fully applied to improving the performance of the video monitoring system.This design is based on the actual situation of the current mainstream video monitoring technology which is considering the change of video monitoring technology in application. It puts forward the FPGA + DSP architecture that realizes video monitoring system. Through the analysis of traditional video processing system and combined with previous experience in related projects, the design proves the feasibility of the scheme from theory to actual conditions, and also eventually determines the architecture of the system. The design uses the mainstream series Spartan-6chips made in Xiline Company and the multimedia TMS320DM648 DSP chip based on the third generation VelociTI ? architecture development made in Texas Instruments as the core chip of this system. The system of natural things through four CCD camera for video recording images can be converted to analog video signal. The signal has A/D converted by chip decoding, and it can output digital signal which conforms to the ITU- R BT. 656 signal format for YCbCr 4:2:2.After parsing the data flow and collecting useful information in an SRAM cache which can communicate with DSP on the data, then it will encode the data into the video encoding chip and send display. Finally it can realize one or four road shows and switch at the same time through the display.In this paper, the main work content is according to the system requirements and quality requirements to complete the main chip and component selection, realizing the design of the whole actual circuit. It can complete the FPGA design and simulation of the internal function modules through ISE so ftware tools and hardware description language. This circuit can achieve the acquisition, decoding, cache and output display. According to the actual situation of the application, the circuit can realize channel switch, composite, etc. In general, this paper has expounded the system design and realization of each module from two aspects of hardware and software. Eventually, I’ve tested the single display, four road show and display switch function on the system by lots of practical experiments. The results prove that system functions have correctly achieved, realizing the expected goal.