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ROI-Based Rate Allocation Algorithm for MPEG-4 FGS
基于感兴趣区的MPEG-4 FGS增强层码率分配算法

Keywords: MPEG-4 FGS,Selective enhancement,Region Of Interest (ROI),Rate-distortion model,Rate allocation
MPEG-4
,FGS,选择性增强,感兴趣区,率失真模型,码率分配

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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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