基于h.264的誤碼掩蓋技術的研究

1、南京航空航天大學碩士學位論文基于H.264的誤碼掩蓋技術的研究姓名：彭浩申請學位級別：碩士專業(yè)：控制理論與控制工程指導教師：劉春生20080101基于 H.264 的誤碼掩蓋技術的研究 ii ABSTRACT In the past 20 years, multimedia communication was developed rapidly worldwide, and was introduced to new video-inf

2、ormation businesses constantly. In coding algorithm of video, a series of standards have been already put out. The latest standard is H.264/AVC that was established finally in May, 2003. Through inheriting, ameliorating

3、and innovating, H.264 synthesizes so many advantages of the previous standards, which not only enhances its compress performance, but also gets eminent predominance in network friendship and error resilience. But it is i

4、mpossible to avoid transmission error as interruption and delay always happen in channel. Since highly compressed video information is very sensitive to interference, error resilience becomes significant in video transmi

5、ssion. In this thesis, we first introduce basic principles of digital video compression coding and several aspects of error control. Then based on the analysis of video coding standard H.264, the error control and conce

6、alment technologies with the overall system analysis in the H.264/AVC standard are discussed. At last, this paper focuses on the post processing technique which is known as error concealment. Based on the research of man

7、y correlated work domestic and foreign, we analyze some error concealment algorithms of H.264 video coding standards in details and points out problems of each algorithm. After that we proposed our refined algorithms in

8、both spatial and temporal areas. In spatial area, we proposed a multi-directional interpolation algorithm which can adaptive divide missing MB into several areas to restore. Experimental results showed that our algorithm

9、 can not only achieve good directional interpolation concealment results in both visual effect and PSNR value but also can avoid fake edges. In temporal area, we propose an effective error concealment algorithm base on v

10、ariable MB mode. Depending on the modes of neighboring MB, each lost MB is concealed on the basis of different block sizes. Simulation results show the proposed method yields better video quality than conventional approa