高速无损压缩的FPGA实现方法研究  

Research of High-speed Lossless Compression FPGA Implementation Method

作　　者：尹维汉[1] 孟令军[1] 龚敬[1] 严帅[1] 

机构地区：[1]中北大学电子测试技术国家重点实验室仪器科学与动态测试教育部重点实验室,太原山西030051

出　　处：《电视技术》2012年第21期55-58,共4页Video Engineering

基　　金：国家自然科学基金资助项目(51075375)

摘　　要：主要研究了无损压缩的FPGA实现方法,该方法基于LZW算法的改进算法。改进后的LZW算法使用分级字典体系,以充分利用FPGA的并行处理能力来实现高速无损压缩。这种分级字典体系由字宽度不同的多个并行字典组成,而不像传统LZW算法中使用单一字宽度的单一字典。使用该方法在FPGA上完成了数据无损压缩系统的设计,测试结果表明在系统时钟为50MHz时,压缩速度高达66.67～246.15Mbit/s。The lossless compression FPGA implementation method is studied in this paper,which is based on the improved LZW algorithm. The im- proved LZW algorithm, unlike the traditional one dependent on a fixed-word-width dictionary, adopts a hierarchical dictionary system composed of several varied-word-width independent dictionaries. So it can take full advantage of FPGA＇ s parallel processing capabilities so as to realize the high-speed loss- less compression. With this method,a data lossless compression system in the FPGA is successfully designed, and the test results show that,when the sys- tem clock is 50 MHz,the compression speed comes up to a range from 66.67 -246.15 Mbit/s.

关 键 词：LZW FPGA 并行处理 高速无损压缩 

分 类 号：TN911[电子电信—通信与信息系统] TP3[电子电信—信息与通信工程]