JPEG压缩编码在DM642平台上的实现及优化  

Realization and optimization of JPEG compression based on DM642 platform

作　　者：许光辉[1] 王正勇[1] 卿粼波[1] 徐萍[1] 

机构地区：[1]四川大学电子信息学院,成都610064

出　　处：《四川大学学报（自然科学版）》2010年第4期768-774,共7页Journal of Sichuan University(Natural Science Edition)

摘　　要：结合TMS320DM642处理器VP口视频采集原理和JPEG压缩编码原理,研究了在TMS320DM642处理器平台上实现图像采集和JPEG压缩编码的具体方法.以此为基础,深入探索了JPEG压缩编码在TMS320DM642处理器平台上的优化,并提出了基于DCT系数低通滤波原理的JPEG压缩编码优化算法,最后对优化结果做出了数值分析.分析结果表明,该算法不仅保证了图像的质量,而且提高了JPEG压缩编码的速度和效率.In combination with the principle of video capture using the VP port of TMS320DM642 processor, as well as the JPEG compression theorem, a concrete method is studied for the realization of video capture and JPEG compression in the TMS320DM642 processor platform. On this basis, the optimization of JPEG compression in the TMS320DM642 processor platform is explored intensively, and a specific optimization algorithm of JPEG compression based on the low-pass filter to DCT coefficients is investigated simultaneously. As an examination of the optimization methods, a numerical analysis is implemented. Analysis results show that not only the image quality is preserved, but also the encoding speed and efficiency are both improved.

关 键 词：JPEG压缩编码 DM642 DCT系数 优化 

分 类 号：TP202.7[自动化与计算机技术—检测技术与自动化装置] TN492[自动化与计算机技术—控制科学与工程]