Based On Dsp Data Encryption Card And Image Compression Platform For System Design And Realization

Information security technology and multimedia communication technology are hotspots in the information science technology,and secrecy coding and compress coding are keys to realize information security and multimedia communication. In this article,two projects-"SQY-15 encrypt subsystem of hospitalization insurance system "and "general image compress flatform" are combined to get a resolvent scheme to realize data encrypt and image compress based on digital signal processor (DSP) and application specific integrated circuits (ASIC). This article includes three key technologies in designing and realizing the data encrypt card and the image compress flatform. They are:(1) design of DSP application system;(2) EPLD designing technology using VHDL language;(3) PCI interface technology . This design implements the data encrypt card and the image compress flatform and grounds for the cipher and compress arithmetic.The major work is as following:The main problem that the encrypt subsystem of hospitalization insurance system is Analyzed,and the scheme using DSP technology to realize encrypt arithmetic is brought out.The data encrypt card using DSP chip,PCI interface chip,asynchronism FIFO chip and EPLD that realize the control of the data encrypt card is designed and implemented.The image compress flatform using DSP chip,image processing chip and SDRAM is designed and implemented.The JPEG arithmetic based on general image compress flatform is realized.Also,VHDL language design technology and main chip apply technology are simply introduced.