基于多DSP的遥感图像实时压缩系统设计  

A real-time compression system for remote sensing image based on multi-DSP

作　　者：贺文静[1] 胡坚[1] 李子扬[1] 孟凡荣[1] 周春城[1] 

机构地区：[1]中国科学院光电研究院中国科学院定量遥感信息技术重点实验室,北京100094

出　　处：《电子技术应用》2015年第5期46-49,56,共5页Application of Electronic Technique

基　　金：国家科技支撑计划项目(863计划)(2011BAH23B01)

摘　　要：随着遥感技术的发展,对高分辨率的遥感图像实时压缩的需求日益迫切。设计了高性能的图像压缩系统,由8片ADSP-TS201为核心处理器和2片FPGA组成,可提供高达28.8 GFLOPS的峰值浮点运算能力。该平台采用PCIE总线作为外部接口,具有良好的可扩展性和强大的数据交换能力;各处理器采用Link Port互联,形成松耦合结构,可实现高速传输、实时处理和大容量存储三者的平衡,具有良好的可重构性和通用性。最后采用该系统实现JPEG2000压缩,实验结果表明,该压缩系统无损压缩速率可达6.2 Mpixels/s,非常适用于高分辨率、高质量遥感图像压缩领域。The demand for real-time compression of high-resolution remote sensing image is becoming urgent, with the develop- ment of remote sensing technology. A muhi-DSP parallel processing system for real-time image compression is designed. The sys- tem is composed of eight DSPs and two FPGAs, providing 28.8 GFLOPS operations performance. PCI-Express bus is used as exter- nal interface, providing the powerful capability of communication and expansion. To archive the high performance in data transmis- sion,processing and large capacity storage, the loose coupled parallel architecture is used, with processors interconnected by Link Port. An application example of JPEG2000 compression based on this system is given. It is shown that the throughout speed of the system can achieve 6.2 Mpixels/s with lossless compression. Therefore, it is suitable for the compressing application of high-resolu- tion remote sensing image.

关 键 词：多DSP FPGA 图像压缩 JPEG2000 并行处理 

分 类 号：TP752[自动化与计算机技术—检测技术与自动化装置]