绪论部分简要介绍了视频压缩编码的基本方法，基于块匹配的混合编码框架的构成以及主要视频编码标准的特点。
The Introduction briefly presents the basic methods of video coding, the structure of block-based hybrid coding frame and the chief characteristics of video coding standards.
最后，系统移植了视频压缩编码h . 264算法，并进行了相应的优化，提高了算法的编码性能，在此基础上对视频DC系数进行了加密。
At last, the system also transplants and optimizes H. 264 arithmetic. After optimizing, the performance of the arithmetic is improved. Furthermore, this dissertation encrypt DC coefficient of a video.
最后，系统移植了视频压缩编码h . 264算法，并进行了相应的优化，提高了算法的编码性能，在此基础上对视频DC系数进行了加密。
At last, the system also transplants and optimizes H. 264 arithmetic. After optimizing, the performance of the arithmetic is improved. Furthermore, this dissertation encrypt DC coefficient of a video.
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