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Abstract
This paper proposes a new motion estimation (ME)-specific instruction-set processor (MESIP) with a novel search scan order with high data reusability, to efficiently implement various advanced ME algorithms. The proposed ME-specific instructions can be selectively used for ME algorithms. The novel data-reusing search scan order, called center biased search scan (CBSS), exploits the symmetry of the search pattern to reduce redundant data loading on MESIP by about 26.9% and 16.1% compared with raster scan and snake scan, respectively. MESIP has been implemented with IBM's 90-nm CMOS technology and has 203 K gates excluding memory. Simulation results show that the proposed MESIP can reduce the number of required instructions by up to 18.9% compared with existing ME processors. Moreover, MESIP achieves comparable performance even with ME ASICs and hence may be quite suitable for a low-power and high-performance ME implementation.
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