| Information Science |
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| A novel adjustable multiple cross-hexagonal search algorithm for fast block motion estimation |
| XIE Chun-lai, CHEUNG Chun-ho, LIU Wei-zhong |
| Department of Electronic Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China; Hong Kong Institute of Technology, Hong Kong, China |
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Abstract In this paper, we propose a novel adjustable multiple cross-hexagonal search (AMCHS) algorithm for fast block motion estimation. It employs adjustable multiple cross search patterns (AMCSP) in the first step and then uses half-way-skip and half-way-stop technique to determine whether to employ two hexagonal search patterns (HSPs) subsequently. The AMCSP can be used to find small motion vectors efficiently while the HSPs can be used to find large ones accurately to ensure prediction quality. Simulation results showed that our proposed AMCHS achieves faster search speed, and provides better distortion performance than other popular fast search algorithms, such as CDS and CDHS.
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Received: 07 September 2006
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