基于HXDSP1042的JPEG压缩算法实现及优化  

Implementation and optimization of JPEG compression algorithm based on HXDSP1042

作　　者：朱树明 潘勇先 叶文静 赵庆 ZHU Shu-ming;PAN Yong-xian;YE Wen-jing;ZHAO Qing(AnHui Siliepoch Technology Co.,Ltd)

机构地区：[1]安徽芯纪元科技有限公司

出　　处：《中国集成电路》2022年第3期47-50,共4页China lntegrated Circuit

摘　　要：为满足合成孔径雷达(Synthetic Aperture Radar,SAR)系统对SAR原始灰度图处理的实时性要求,在分析了JPEG编码原理和双核HXDSP1042硬件架构的基础上,提出了一种基于HXDSP1042的JPEG压缩算法实现及优化方法。该方法运用HXDPS1042的双核资源及并行汇编指令来实现和优化JPEG压缩算法。实验结果表明,该方法在SAR灰度图大小为512×512及1024×1024时,双核HXDSP1042优化实现的JPEG压缩算法运算时间分别仅为17.36 ms和52.76 ms,有效地缩减了JPEG压缩算法的运行时间,满足合成孔径雷达系统的实时性要求。In order to meet the real-time requirements of synthetic aperture radar(Synthetic Aperture Radar,SAR)system for SAR raw grayscale image processing,based on the analysis of the JPEG encoding principle and the dual-core HXDSP1042 hardware architecture,a JPEG compression algorithm implementation and optimization method based on HXDSP1042 is proposed.This method uses HXDPS1042 dual-core resources and parallel assembly instructions to implement and optimize the JPEG compression algorithm. The experimental results show that when the SAR gray scale image size is 512×512 and 1024×1024, the JPEG compression algorithm operation time the dual -core HXDSP1042 optimized implementation is only 17.36 ms and 52.76 ms, which effectively reduces the JPEG compression algorithm. The running time meets the real-time requirements of the synthetic aperture radar system.

关 键 词：SAR HXDSP1042 JPEG 双核资源 汇编优化 

分 类 号：TN957.51[电子电信—信号与信息处理]