Low-energy motion estimation architecture using quadrant-based multi-octagon (QBMO) algorithm

Abstract

The H.264 video-coding standard is a great improvement on its predecessor in that it is able to save 50 % of the bit-rate while maintaining the same quality as MPEG-4. However, its high computational complexity means the standard consumes large amounts of energy to process a video sequence, especially during motion estimation (ME) searches. To overcome this problem, a low-energy ME architecture is proposed in this paper that utilizes a quadrant-based multi-octagon search algorithm as one of its fast-search motion-estimation techniques. The proposed architecture is able to reduce the clock cycle needed to perform the search by 42 % compared to the original conventional algorithm. This clock cycle reduction reduces energy consumption by up to 43 %.

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