Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article Block-Matching Translational and Rotational Motion Compensated Prediction Using Interpolated Reference Frame | Hindawi Publishing Corporation EURASIP Journal on Advances in Signal Processing Volume 2010 Article ID 385631 9 pages doi 2010 385631 Research Article Block-Matching Translational and Rotational Motion Compensated Prediction Using Interpolated Reference Frame Ka-Ho Ng 1 Lai-Man Po 1 Kwok-Wai Cheung 2 and Ka-Man Wong1 department of Electronic Engineering City University of Hong Kong Hong Kong department of Computer Science Chu Hai College of Higher Education Hong Kong Correspondence should be addressed to Ka-Ho Ng kahomike@ Received 26 July 2010 Revised 7 October 2010 Accepted 18 November 2010 Academic Editor Stephen Marshall Copyright 2010 Ka-Ho Ng et al. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. Motion compensated prediction MCP implemented in most video coding schemes is based on translational motion model. However nontranslational motions for example rotational motions are common in videos. Higher-order motion model researches try to enhance the prediction accuracy of MCP by modeling those nontranslational motions. However they require affine parameter estimation and most of them have very high computational complexity. In this paper a translational and rotational MCP method using special subsampling in the interpolated frame is proposed. This method is simple to implement and has low computational complexity. Experimental results show that many blocks can be better predicted by the proposed method and therefore a higher prediction quality can be achieved with acceptable overheads. We believe this approach opens a new direction in MCP research. 1. Introduction Modern video coding schemes achieve high compression efficiency by exploring the temporary redundancy between frames via motion compensated prediction MCP . In MCP a block of pixels in reference frames is chosen as .
