@article{ref1,
title="High-performance motion estimation for image sensors with video compression",
journal="Sensors (Basel)",
year="2015",
author="Xu, Weizhi and Yin, Shouyi and Liu, Leibo and Liu, Zhiyong and Wei, Shaojun",
volume="15",
number="8",
pages="20752-20778",
abstract="It is important to reduce the time cost of video compression for image sensors in video sensor network. Motion estimation (ME) is the most time-consuming part in video compression. Previous work on ME exploited intra-frame data reuse in a reference frame to improve the time efficiency but neglected inter-frame data reuse. We propose a novel inter-frame data reuse scheme which can exploit both intra-frame and inter-frame data reuse for ME in video compression (VC-ME). Pixels of reconstructed frames are kept on-chip until they are used by the next current frame to avoid off-chip memory access. On-chip buffers with smart schedules of data access are designed to perform the new data reuse scheme. Three levels of the proposed inter-frame data reuse scheme are presented and analyzed. They give different choices with tradeoff between off-chip bandwidth requirement and on-chip memory size. All three levels have better data reuse efficiency than their intra-frame counterparts, so off-chip memory traffic is reduced effectively. Comparing the new inter-frame data reuse scheme with the traditional intra-frame data reuse scheme, the memory traffic can be reduced by 50% for VC-ME.<p /> <p>Language: en</p>",
language="en",
issn="1424-8220",
doi="10.3390/s150820752",
url="http://dx.doi.org/10.3390/s150820752"
}