| Wang Ke (王科),Huang Dongshan,Ma Li,Zhang Yudong.[J].高技术通讯(英文),2014,20(3):321~327 |
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| Research on variable block size motion estimation algorithm for airborne image |
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| DOI：10.3772/j.issn.1006-6748.2014.03.015 |
| 中文关键词: |
| 英文关键词: H.264, motion estimation, line scan algorithm, rate distortion optimization (RDO), FPGA, block merge method |
| 基金项目: |
| Author Name | Affiliation | | Wang Ke (王科) | | | Huang Dongshan | | | Ma Li | | | Zhang Yudong | |
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| 中文摘要: |
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| 英文摘要: |
| A fast motion estimation algorithm for variable block-size using the “line scan and block merge procedure” is proposed for airborne image compression modules. Full hardware implementation via FPGA is discussed in detail. The proposed pipelined architecture based on the line scan algorithm is capable of calculating the required 41 motion vectors of various size blocks supported by H.264 within a 16×16 block in parallel. An adaptive rate distortion cost function is used for various size block decision. The motion vectors of adjacent small blocks are merged to predict the motion vectors of larger blocks for reducing computation. Experimental results show that our proposed method has lower computational complexity than full search algorithm with slight quality decrease and little bit rate increase. Due to the high real-time processing speed it can be easily realized in hardware. |
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