基于FPGA的星载图像压缩系统  

Spaceborne Image Compression System Based on FPGA

作　　者：章勇勤[1,2] 苏贵波[1] 吴敏渊[1] 黄海波[1] 艾勇[1] 

机构地区：[1]武汉大学电子信息学院,湖北武汉430079 [2]华北水利水电学院,河南郑州450011

出　　处：《电视技术》2010年第4期22-25,共4页Video Engineering

摘　　要：为了解决星地间的数据通信,阐述了基于FPGA平台的JPEG图像压缩系统的设计与实现。为提高数据吞吐量和降低结构复杂性,对JPEG标准算法进行了优化,减少了硬件资源开销,采用改进的快速DCT运算,量化由乘法替代除法操作,扫描用查找表以避免使用RAM资源,由熵编码经转换输出预定义的压缩码流。实验结果表明,该系统功耗低、可靠性高,满足星载图像压缩系统的预期指标要求。In order to solve the video communication between the satellite and the earth, the design and implementation of JPEG image compression system based on FPGA are described. In the perspective of improving the data throughput and reducing the complexity of system architecture, the JPEG standard algorithm is optimized and hardware resource cost is reduced. The improved Fast DCT is taken. The multiplication operation is substituted for division in the quantization step. The scanning process with look-up table is used so as to avoid using of RAM resources. The predefined compression streams are obtained by the entropy coding. Experimental results show that the system with low power consumption and high reliability can meet requirements of spaceborne image compression.

关 键 词：现场可编程门阵列 离散余弦变换 熵编码 压缩比 

分 类 号：TN919.8[电子电信—通信与信息系统] TP391[电子电信—信息与通信工程]