一种适用于JPEG2000的流水线MQ编码器设计

JPEG2000采用基于上下文的MQ算术编码来增强压缩效果,但其实现比较复杂,特别对编解码器具有高数据吞吐量要求的高分辨率图像处理难以达到实时实现,为此提出MQ算术编码的硬件快速算法。首先分析了JPEG2000标准中MQ编码算法流程,然后提出了一种四级流水线结构的硬件实现。实验结果表明,根据所提出的硬件结构,编码器在Altera的EP1S25B672上最高运行速度能够达到65MHz,共占用了1051个LE资源,以较少的资源取得了较高的数据吞吐量。

Design of a pipeline architecture for MQ-coder of JPEG200 standard

In JPEG2000 image compression standard,context- based arithmetic coding is adopted for improving compression rate.The al- gorithm is so complicated that it' s difficult to handling high- resolution images in real- time applications,so we proposed a fast hard- ware algorithm. In this paper,we first analyze the software flow of MQ- coding algorithm in JPEG2000 stanard,and then proposed a four stage pipeline architecture.Experimental result shows the encoder can work up to 65MHz on Altera' s EP1S25B672 and the re- source used are 1051 LEs,it use less resource and can achieve a high throughput.