tailieunhanh - Báo cáo hóa học: " Research Article Spatial-Aided Low-Delay Wyner-Ziv Video Coding"

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 Spatial-Aided Low-Delay Wyner-Ziv Video Coding | Hindawi Publishing Corporation EURASIP Journal on Image and Video Processing Volume 2009 Article ID 109057 11 pages doi 2009 109057 Research Article Spatial-Aided Low-Delay Wyner-Ziv Video Coding Bo Wu 1 Xiangyang Ji 2 Debin Zhao 3 and Wen Gao1 4 1 Digital Media Research Center Institute of Computing Technology Chinese Academy of Science Beijing 100190 China 2 Department of Automation Tsinghua University Beijing 100084 China 3 Department of Computer Science Harbin Institute of Technology Harbin 150001 China 4 Institute of Digital Media School of Electronic Engineering and Computer Science Peking University Beijing 100871 China Correspondence should be addressed to Debin Zhao dbzhao@ Received 6 May 2008 Revised 28 October 2008 Accepted 12 January 2009 Recommended by Anthony Vetro In distributed video coding the side information SI quality plays an important role in Wyner-Ziv WZ frame coding. Usually SI is generated at the decoder by the motion-compensated interpolation MCI from the past and future key frames under the assumption that the motion trajectory between the adjacent frames is translational with constant velocity. However this assumption is not always true and thus the coding efficiency for WZ coding is often unsatisfactory in video with high and or irregular motion. This situation becomes more serious in low-delay applications since only motion-compensated extrapolation MCE can be applied to yield SI. In this paper a spatial-aided Wyner-Ziv video coding WZVC in low-delay application is proposed. In SA-WZVC at the encoder each WZ frame is coded as performed in the existing common Wyner-Ziv video coding scheme and meanwhile the auxiliary information is also coded with the low-complexity DPCM. At the decoder for the WZ frame decoding auxiliary information should be decoded firstly and then SI is generated with the help of this auxiliary information by the spatial-aided motion-compensated extrapolation SA-MCE . Theoretical analysis proved that

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