摘要
随着空间应用技术的不断发展,目标影像信息呈几何级数增长。为了能够在有限的信道带宽上传输更多的目标影像信息,文中提出了一种高清视频图像压缩与存储的设计方案。设计中利用JPEG2000标准压缩芯片ADV212完成对箭载图像的有效压缩。同时利用Flash芯片完成对原始图像数据的高速存储。FPGA作为系统主控,主要实现对各芯片的初始化及逻辑控制,配置ADV212在HIPI的工作模式下进行图像压缩,通过对大容量的Nand Flash使用交叉双平面技术,将原始图像以及压缩图像进行分区存储。随后通过USB接口将图像信息上传到PC机。系统具有图像压缩比可调,存储器容量可扩展等优点。通过实验验证,该方案达到了系统要求的各项指标,并已成功的进入试用阶段。
With the continuous development of space applications technology, information about the target image grows in an exponential magnitude. In order to transmit more target image information in a limited channel bandwidth, this paper presents a design of high-definition video compression and storage. The JPEG2000 standard compression chip ADV212 can achieve effective compression of rocket-borne image. At the same time, the Flash chip can complete high- speed storage of original image data. FPGA as the main control system, mainly achieves to initialize and logically control each chip, ADV212 is used to compress images in HIPI operating mode. Through the use of large-capacity Nand Flash in two plane page program, the original images are stored separately from the compressed images. Then the image information can be uploaded to the PC via the USB interface. The system has the advantages of adjustable image compression ratio, memory capacity can be expanded, and so on. Experiments have shown that the program has achieved the indicators of system requirements, and has entered the trial period successfully.
出处
《实验室研究与探索》
CAS
北大核心
2016年第7期117-119,138,共4页
Research and Exploration In Laboratory
