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Title: Semi-hierarchical based motion estimation algorithm for the dirac video encoder
Authors: Tun, M
Loo, KK
Cosmas, J
Keywords: Semi-hierarchical;Motion estimation;Dirac wavelet video cCodec
Issue Date: 2008
Publisher: World Scientific and Engineering Academy and Society
Citation: WSEAS Transaction on Signal Processing 4(5): 261-270, May 2008
Abstract: Having fast and efficient motion estimation is crucial in today’s advance video compression technique since it determines the compression efficiency and the complexity of a video encoder. In this paper, a method which we call semi-hierarchical motion estimation is proposed for the Dirac video encoder. By considering the fully hierarchical motion estimation only for a certain type of inter frame encoding, complexity of the motion estimation can be greatly reduced while maintaining the desirable accuracy. The experimental results show that the proposed algorithm gives two to three times reduction in terms of the number of SAD calculation compared with existing motion estimation algorithm of Dirac for the same motion estimation accuracy, compression efficiency and PSNR performance. Moreover, depending upon the complexity of the test sequence, the proposed algorithm has the ability to increase or decrease the search range in order to maintain the accuracy of the motion estimation to a certain level.
ISSN: 1790-5052
Appears in Collections:Electronic and Computer Engineering
Dept of Electronic and Computer Engineering Research Papers

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