An Adaptive Motion Estimator Design for High Performances H.264/AVC Codec

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An evident trend in modern world is the digital convergence in the current electronic consumer products which have various functions like Video on Demand (VOD), Digital Multimedia Broadcasting (DMB), Global Positioning System (GPS), Portable Multimedia Player (PMP) and so on. Due to such demand, it is necessary to support the widely used video compression standards in a single system-on-chip (SoC) platform. In this paper, we present a cost-sharing and adaptive GFS (Gradient-Four Search) architecture that integrates the gradient and the four step search algorithms to support the slow and rapid H264AVC video sequences. The proposed architecture can be configured dynamically by the appropriate algorithm depending on the video nature (slow or rapid). It uses only one data path to reduce the hardware cost significantly and it is based on stoppable clock technique to reduce dissipated power. The shared architecture is synthesized in CMOS 0.35 nm technology. The results show that the proposed design satisfies the requirement of the two types of video sequences with a maximum PSNR video quality. The scheme is also suitable for low-cost implementation in modern multi-codec systems.
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H.264; Adaptive Motion Estimation; Four Step Search; Gradient Search; Low Power; Area Reduction; Portable Codec

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