JPEG离散余弦变换的FPGA硬件实现

Digital Cosine Transform of JPEG Based on FPGA

本文基于FPGA设计了JPEG图像压缩中的离散余弦变换(DCT),通过改进算法,优化结构,在合理利用硬件资源的条件下,有效挖掘出算法内部的并行性。设计了并行查找表结构的乘法器,采用了流水线优化算法解决时间并行性问题,提高了运算速度。整个设计通过EDA软件进行了逻辑综合及功能与时序仿真。综合和仿真结果表明:文中所提出的算法在速度和资源利用方面均达到了较好的状态,可满足实时JPEG图像压缩的要求。

This paper presents the Digital Cosine Transform in JPEG image compression based on FPGA.Through improving algorithms and optimizing structures,in conditions of efficient use of hardware resource,the utility of the parallel algorithm is exploited more efficiently.A multiplication based on parallel LUT(Look up Table) is designed.The problem of time parallel is solved using pipeline optimization algorithm,so that the speed of DCT is accelerated.The design is synthesized in logic and simulated for function and timing estimation using EDA software.The result of synthesis and simulation indicate that the design can give a better performance in speed and resource using with less hardware resource and a higher frequency,and can meet the requirement of real-time application for JPEG image processing.