%0 Journal Article
%T ROI-Based Rate Allocation Algorithm for MPEG-4 FGS<br>基于感兴趣区的MPEG-4 FGS增强层码率分配算法
%A Chen Qiang
%A Zhuo Li
%A Shen Lan-Sun
%A <br>陈强
%A 卓力
%A 沈兰荪
%J 电子与信息学报
%D 2005
%I 
%X 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.
%K MPEG-4 FGS
%K Selective enhancement
%K Region Of Interest (ROI)
%K Rate-distortion model
%K Rate allocation<br>MPEG-4
%K FGS
%K 选择性增强
%K 感兴趣区
%K 率失真模型
%K 码率分配
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=1319827C0C74AAE8D654BEA21B7F54D3&jid=EFC0377B03BD8D0EF4BBB548AC5F739A&aid=B138E5DDCA6DEC29&yid=2DD7160C83D0ACED&vid=DB817633AA4F79B9&iid=38B194292C032A66&sid=EE23223CE4332BD7&eid=DA74B62FE4348759&journal_id=1009-5896&journal_name=电子与信息学报&referenced_num=4&reference_num=5