基于感兴趣区的MPEG-4 FGS增强层码率分配算法
ROI-Based Rate Allocation Algorithm for MPEG-4 FGS
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摘要: 该文提出了一种基于感兴趣区的MPEG-4 FGS增强层码率分配算法。该算法在建立一种针对感兴趣区的率失真模型的基础上,在等质量的约束条件下,可以实现选择性增强后FGS增强层码率的优化分配。实验结果表明,与平均码率分配算法相比,该算法可以显著降低视频图像中人眼感兴趣区域重建质量的波动。同时,该算法的计算复杂度低,完全能满足视频服务器实时码率分配的要求。Abstract: A ROI-based rate allocation algorithm for the MPEG-4 FGS enhancement layer is proposed in this paper. On the basis of the ROI-oriented rate-distortion model, the proposed algorithm can perform optimal rate allocation for the enhancement layer after selective enhancement under equal image quality constraint. The experimental results show that, compared with the conventional average rate allocation algorithm, the proposed algorithm can significantly eliminate the quality fluctuation of ROI. Simultaneously, the computational complexity of the proposed method is low enough to meet the requirements of the real time rate allocation at the video server.
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Li Wei-ping. Overview of fine granularity scalability in MPEG-4 video standard[J].IEEE Trans. on Circuits and Systems for Video Technology.2001, 11(3):301-[2]沈兰荪,卓力,田栋,汪孔桥.视频编码与低速率传输.北京:电子工业出版社,2001,12:91-92.[3]王琪,赵黎,吴枫,李世鹏,钟玉琢.可伸缩性视频编码的码率分配算法.电子学报,2002,30(2):205-209.[4]Zhang Xi-Min, Vetro A, Shi Yun Q, Sun Huifang. Constant quality constrained rate allocation for FGS coded video [J].IEEE Trans. on Circuits and Systems for Video Technology.2003, 13(2):121-[5]Zhao Xue-jun, He Yuwen, Yang Shiqiang, Zhong Yuzhuo. Rate allocation of equal image quality for MPEG-4 FGS video streaming. 12th International Packet Video Workgroup (PV2002),Pittsburgh, April 2002:24 - 26. -
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