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

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.