基于半马尔科夫决策过程的视频传输拥塞控制算法  

Semi-Markov decision process based congestion control algorithm for video transmission

作　　者：田波[1] 杨宜民[1] 蔡述庭[1] 

机构地区：[1]广东工业大学自动化学院,广东广州510090

出　　处：《通信学报》2014年第8期154-161,共8页Journal on Communications

基　　金：国家自然科学基金资助项目(61201392)~~

摘　　要：针对传输控制协议(TCP,transmission control protocol)的拥塞控制算法未能满足视频传输质量要求的问题,提出了一种基于半马尔科夫决策过程的视频传输拥塞控制算法。首先,为克服目前基于峰值信噪比的视频质量评估方法实时性低的缺点,设计了一种可在线运行的无参考视频质量评估方法。其次,根据接收端视频质量的反馈,采用半马尔科夫决策过程对拥塞控制进行建模,并通过求解此模型得到拥塞控制参数的调整策略。仿真实验结果表明,与目前典型的拥塞控制算法相比,该算法不但具备更好的TCP友好性,而且有效地提高了解码后视频序列的主观和客观质量。Due to the problem that the congestion control algorithm of transmission control protocol （TCP） cannot meet the requirements of quality of experience for Intemet video transmission, a semi-Markov decision process based congestion control algorithm for video transmission was proposed. First, in order to improve the accuracy of video quality assessment, an online operation no-reference video quality assessment was presented. Then, the congestion control problem was formulated as a semi-Markov decision process according to the feedback of video quality assessment, and the optimal parameters of congestion control were obtained by solving the semi-Markov decision process. Simulation results reveal that proposed algorithm achieves better＇subjective and objective video quality, and obtains well TCP-friendliness ratio, compared with the conventional congestion control algorithms.

关 键 词：拥塞控制 视频传输 视频质量评估 半马尔科夫决策过程 

分 类 号：TN919.85[电子电信—通信与信息系统]