¡¡	Chinese Journal of Computers   Full Text
Title	Research Progress in Video Motion Estimation Techniques in the Wavelet Domain
Authors	SONG Chuan-Ming1) WANG Xiang-Hai1),2)2
Address	1)(College of Computer and Information Technology, Liaoning Normal University, Dalian 116029) 2)(National Laboratory on Machine Perception, Center of Information Science for Peking University, Beijing 100871)
Year	2005
Issue	No.10(1716¡ª1727)
Abstract &   Background	In recent decade, the fact, that wavelet transform has gained a great success in the field of still image coding, moreover, it has been accepted as a powerful tool by the JPEG2000 standard, has attracted numerous researchers¡¯ attention in video coding field, so that they devoted themselves one after another to the research of wavelet-based video coding techniques. As one of the key techniques of video encoder, motion estimation technique in the wavelet domain has become a research hotspot in recent years. This paper firstly discusses the deficiency of motion estimation techniques in the spatial domain and the advantages of the ones in the wavelet domain. And secondly takes the development of the motion estimation techniques in the wavelet domain as the thread to sum up the present techniques as three kinds, namely, band to band motion estimation techniques, indirect band motion estimation techniques and shift-variant resistant motion estimation techniques, and then make a general discussion and comparative study on the three kinds of methods, which carries on a deep discussion on the scope of application, advantages and disadvantages of every method of each kind of techniques. Finally, at the basis of above£¬the state of arts and possible new directions of motion estimation techniques in the wavelet domain are stated. keywords motion estimation; wavelet domain; video coding; subband background We¡¯re now presiding over the project ¡°Research on Object-based Fine Granular Scalable Video Coding¡± supported by the National Natural Science Foundation of China under grant Noª±60372071.The project firstly studies the theories and methods of the object-based shape-adaptive wavelet transform and wavelet-based video object motion estimation techniques. And on the basis of the above, the final goal is to propose a fine granular spatial scalable, rate scalable and hybrid spatial and rate scalable video object coding scheme based on the 2D wavelet and its motion compensation. In the whole project, motion estimation in the wavelet domain is a key technique. Over the past year, we have been actively organizing the discussion in our research group once a week. So far, we have obtained some phased achievements. This paper is written on the basis of the discussion and gives an overview of the research progress of video motion estimation techniques in the wavelet domain.