基于FPGA的JPEG编解码设计  

JPEG coding and decoding design based on FPGA

作　　者：张绪珩 王淑仙[1] 

机构地区：[1]华东师范大学信息科学技术学院,上海200241

出　　处：《信息技术》2014年第4期164-167,共4页Information Technology

摘　　要：JPEG(Joint Photographic Experts Group)作为一个基本的图像压缩方式,已经得到了广泛的运用。而FPGA具有的并行计算特点,使得越来越多的设备利用FPGA对jpeg文件进行编解码。从整体上介绍JPEG编解码的基本算法,并着重介绍了在DCT和Huffman两个模块中使用的方法。在DCT/IDCT模块中,为了提高处理速度,充分利用FPGA并行处理的特点。对于Huffman解码模块,采用附加码位宽的查找表方法,并利用综合工具将查找表综合到片内存储器中这一特点来减少资源。JPEG（Joint Photographic Experts Group）, as a basic way of image compression, has been widely used. There are more and more devices processing jpeg files based on FPGA since its parallel processing feature. This paper provides a whole view of the JPEG encoding and decoding and gives out more attention to the DCT/IDCT and Huffman modules. In the DCT/IDCT module, thanks to the parallel processing of the FPGA, the improvement of processing speed can be achieved; as in the Huffman module, additional code length is used, and it costs less resource as the FPGA synthesis tool put the looking up table into the memory within the chip.

关 键 词：JPEG 压缩 解码 FPGA DCT IDCT模块 Huffman查找表 

分 类 号：TN919.81[电子电信—通信与信息系统]