【作者】 牛建民；

【导师】 张晨曦； 徐燕凌； 黄晓东；

【作者基本信息】 同济大学 ， 软件工程， 2007， 硕士

【摘要】 ITU-T Rec．H．264|ISO／IEC 14496-10 AVC(简称H．264)是最新的视频编码国际标准，由ISO／IEC的运动图像专家组MPEG和ITU-T的视频编码专家组VCEG组成的联合视频小组JVT共同开发而成。H．264标准中包含了很多先进的视频压缩编码方法，与以前的视频编码标准相比有了明显的进步。在相同视觉感知质量的基础上，H．264的编码效率比MPEG-2提高了50％左右，并且有更好的网络友好性。本文主要完成了对H．264视频压缩算法的编码器的各个关键环节的分析，以及对H．264视频压缩算法的软件实现的研究，还有对H．264视频压缩算法的压缩性能的测试和分析。另外，本文研究了基于TI DSP DM642的视频编码试验板的设计与实现，分析了基于DM642的H．264压缩算法的优化方向和具体的优化措施，并在这个硬件平台上对编码算法的实现函数进行了详细测试，对其编码效率、实时性和编码后压缩图像的质量进行了评估。更多还原

【Abstract】 ITU-T Rec. H.264|ISO/IEC 14496-10 Advanced Video Coding (commonlyreferred as H.264/AVC) is the newest international video coding standards. It wasdeveloped by a Joint Video Team (JVT) consisting of experts from ITU-T’s VideoCoding Experts Group (VCEG) and ISO/IEC’s Moving Picture Experts Group(MPEG). Several coding elements contribute to the great improvement incompression efficiency for the new standard. In the process, the standard was createdthat improved compression efficiency by a factor about two (on average) overMPEG-2, and has more better network appetence.This paper analyses the essential parts of the H.264 video encoder, as well asthe implementation of H.264 video compression software. It also tests and analyzesthe performance of the H.264 video compression algorithm. This paper has studiedthe design and the realization of the video encoding experiment board which is basedon the Texas Instruments’ DSP DM642. It analyzes the DM642-based H.264compression algorithm optimization and the concrete optimization measures. It hascarried out the detailed test on the encoding functions which is running on thishardware platform, and has given the appraisal about the coding efficiency,timeliness and the quality of encoded pictures.更多还原