Name
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. |
Year | DOI | Venue |
|---|---|---|
2015 | 10.3390/s150820752 | SENSORS |
Keywords | Field | DocType |
memory bandwidth,image sensors,video compression,motion estimation,full search,inter-frame,data reuse | Reference frame,Memory bandwidth,Computer science,Electronic engineering,Real-time computing,Inter frame,Pixel,Motion estimation,Data compression,Data access,Wireless sensor network,Embedded system | Journal |
Volume | Issue | Citations |
15 | 8 | 1 |
PageRank | References | Authors |
0.38 | 28 | 5 |
Name | Order | Citations | PageRank |
|---|---|---|---|
| XU Wei-Zhi | 1 | 36 | 8.65 |
| shouyi yin | 2 | 579 | 99.95 |
| leibo liu | 3 | 816 | 116.95 |
| Zhiyong Liu | 4 | 659 | 75.59 |
| Shaojun Wei | 5 | 555 | 102.32 |