%0 Journal Article %T A Rate Control Algorithm for H.264 Low-delay Video Transmission over Wireless Network
低延时无线视频传输中的H.264码率控制算法 %A FEI Wei %A ZHU Shan-an %A
费伟 %A 朱善安 %J 中国图象图形学报 %D 2008 %I %X In this paper,we proposed an efficient joint source-channel rate control algorithm for real-time wireless video transmission which use automatic repeat request scheme to retransmission the error packet.The two-state Markov model was used to simulate the wireless channel,and the Cauchy-distribution-based rate and distortion model were used as the source model.In the new scheme,at frame level,a PID-controller-based buffer control algorithm was developed to improve the buffer control ability which allocated frame target bit based on the channel bandwidth and buffer status;at macroblock level,the frame bit-budget was distributed among macroblocks using the new rate-distortion model and Lagrange optimization method.Experimental results show that,the proposed algorithm can improve the average PSNR and decrease the number of skipped frames significantly. %K wireless video transmission %K rate control %K Markov model %K rate distortion model %K Cauchy distribution
无线视频传输 %K 码率控制 %K Markov模型 %K 率失真模型 %K Cauchy分布 %U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=8240383F08CE46C8B05036380D75B607&jid=D06194629680C940ACE75262F54B9D85&aid=77E2EF85A16E1272170BA296560B3EDC&yid=67289AFF6305E306&vid=FC0714F8D2EB605D&iid=708DD6B15D2464E8&sid=9329D00191B11ACC&eid=0FC8B9772E3A7521&journal_id=1006-8961&journal_name=中国图象图形学报&referenced_num=0&reference_num=11