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Real-time 3D graphics will be a major power consumer in future portable embedded systems. In this paper we present a 3D CORDIC vector interpolator for a power-aware graphics system. This new interpolator supports dynamic control of computing precision with an output accuracy range of 6 to 10 bits. The output precision control of this interpolator exploits the Human Visual Perception (HVP) to mask the image quality degradation resulting from low precision computation. The results of implementation and simulation show a 77% energy savings over a non-adaptive system while sharing no noticeable image quality degradation.
Date of Conference: 16-18 Oct. 2002