Dissertation > Industrial Technology > Radio electronics, telecommunications technology > Communicate > Image communication, multimedia communication > Image coding

The Research of Motion Estimation in the Field of Video Compression

Author YeXueBing
Tutor ZhaoShuQing
School Beijing University of Chemical Technology
Course Applied Computer Technology
Keywords Video Coding Motion Estimation Block-matching Correlation Center bias
CLC TN919.81
Type Master's thesis
Year 2005
Downloads 180
Quotes 5
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Video coding is one of the hot topics in the field of information technology today , due to a strong correlation of the video sequence of images in the timeline , motion estimation (ME) and motion compensation (MC) technology can effectively reduce the time , so the technology has been widely used in a variety of video compression coding schemes such as MPEG and H.26x . This paper first introduces some basic technology of motion estimation , block size , starting point forecast , search accuracy and search strategies , and simulation of several block -matching motion estimation algorithms and their performance analyzed . For block matching motion estimation algorithm exist some defects , such as full use of the adjacent vector correlation and center-biased characteristic proposed two improved motion estimation algorithm for video coding movement , respectively, as a estimated new algorithm (NITSS) the diamond search algorithm based on adaptive prediction (APDS) . These two algorithms full use of the correlation of the motion vector and the center bias characteristic was improved on this basis for the choice of the search starting point , the search model and search strategies . The simulation results show that , compared with the existing algorithm , such as three-step search method, four-step search , diamond search , these two algorithms in search accuracy and search time there is a certain improvement .

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