Changchun Institute of Optics,Fine Mechanics and Physics,CAS
HEVC rate control for unmanned aerial vehicle airborne reconnaissance | |
Zhao, C.-L.; M. Dai and C.-L. Yin | |
2015 | |
发表期刊 | Guangxue Jingmi Gongcheng/Optics and Precision Engineering |
卷号 | 23期号:12页码:3500-3508 |
摘要 | A High Efficiency Video Coding (HEVC) rate control algorithm with a low-delay was proposed based on buffer status and a gradient operator to improve the poor video quality of the current HEVC rate control scheme caused by the improper bit allocation in Unmanned Aerial Vehicle (UAV) airborne reconnaissance. First, both the buffer state and the remained bits were used to pre-allocate the frame layer target bits. Then, the time and space complexity of the Largest Coding Unit (LCU) in each frame was taken as the weight, layer bits hierarchically with the reconnaissance video features was evaluated by a gradient value. Finally, Quantization Parameter (QP) was derived from R- model, the encoder in the LCU and the model parameter updating were implemented. Experimental results show that the proposed algorithm reduces mismatch ratio to 2/5 that of the rate control scheme in HM16.0, and PSNR (Peak Signal-to-noise Ratio) fluctuation has been within 1/4 under the 8 Mbps bandwidth. Moreover, the proposed algorithm provides an improvement in subjective quality evaluation and has less bit fluctuation and lower, steadier buffer occupancy, which enables a lower delay of aerial photography applications. 2015, Science Press. All right reserved. |
文章类型 | 期刊论文 |
收录类别 | EI |
文献类型 | 期刊论文 |
条目标识符 | http://ir.ciomp.ac.cn/handle/181722/56146 |
专题 | 中科院长春光机所知识产出 |
推荐引用方式 GB/T 7714 | Zhao, C.-L.,M. Dai and C.-L. Yin. HEVC rate control for unmanned aerial vehicle airborne reconnaissance[J]. Guangxue Jingmi Gongcheng/Optics and Precision Engineering,2015,23(12):3500-3508. |
APA | Zhao, C.-L.,&M. Dai and C.-L. Yin.(2015).HEVC rate control for unmanned aerial vehicle airborne reconnaissance.Guangxue Jingmi Gongcheng/Optics and Precision Engineering,23(12),3500-3508. |
MLA | Zhao, C.-L.,et al."HEVC rate control for unmanned aerial vehicle airborne reconnaissance".Guangxue Jingmi Gongcheng/Optics and Precision Engineering 23.12(2015):3500-3508. |
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