基于数据流的视频解码微控制器设计

针对数字视频解码芯片设计中多种视频协议的解析问题，提出一种专用微控制器设计方法。该方法采用面向视频解析的指令集，针对视频解析过程的特点对指令进行特别优化，采用配合该专用微控制器的视频解析模型，较好实现了MPEG1/2、AVS、H.264等视频协议的兼容，保证了解码效率且不会增加芯片面积和功耗。

Design of Micro Controller for Video Decoding Based on Data Flow

In the dominance-based rough sets approach, attributes values in information systems have preference relation. Many data sources have dynamic characteristics. How to update approximations based on the original approximations information is an important problem since it may improve the efficiency of knowledge discovery. This paper provides the definitions of attribute values coarsening and refining based on the dominance relation in incomplete information systems, focuses on discussing and analyzing the change of upper and lower approximations, rough approximation accuracy and the quality of rough approximations in incomplete information systems based on the dominance relation while attribute values are coarsened or refined respectively. An example is used to illustrate the validity of the method.