| With the support of the national education policy,the demand of teaching and recording products is increasing,and the core content is multi-channel high-definition video image processing.Based on the practical application of teaching and recording system,combined with the needs of high-definition video processing technology,this paper studies a feasible hardware system for multi-channel high-definition video processing.This paper firstly analyzes the development of high-definition video processing through the relevant information of video processing technology.Then it carefully analyzes the requirements of multi-channel high definition video processing hardware system and the principles of related technologies.Secondly,based on the modularization design method,this paper presents a hardware system solution that based on digital media processor DM8148 for the back-end image processing subsystem,based on FPGA for the front-end acquisition processing subsystem,based on STM32 microprocessor for the coordinated management processing subsystem.Thirdly,the paper recounts the detailed design of the three subsystems.It makes a systematic analysis of the logical relationship between each processing subsystem,as well as the logical principle among the components in each subsystem.The paper also recounts the power system to sort out the power demand of each subsystem.Then,it detailedly describes the schematic design of each subsystem and the circuit board design method.Furthermore,the paper gives the chip driver design of image acquisition device based on STM32 microprocessor system.At last,it shows the entire system works and testing process.Research results show that,the hardware system scheme proposed in this paper can meet the application requirements of the teaching and recording system.It is effective and feasible.Based on the modular design architecture,the implementation of multi-channel high-definition video image processing has important practical significance. |
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