Bo TIAN, Yi-min YANG, Shu-ting CAI. Semi-Markov decision process based congestion control algorithm for video transmission[J]. Journal on Communications, 2014, 35(8): 154-161.
DOI:
Bo TIAN, Yi-min YANG, Shu-ting CAI. Semi-Markov decision process based congestion control algorithm for video transmission[J]. Journal on Communications, 2014, 35(8): 154-161. DOI: 10.3969/j.issn.1000-436x.2014.08.019.
Semi-Markov decision process based congestion control algorithm for video transmission
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。
Abstract
Due to the problem that the congestion control algorithm of transmission control protocol (TCP) cannot meet the requirements of quality of experience for Internet video transmission
a semi-Markov decision process based conges-tion control algorithm for video transmission was proposed. First
in order to improve the accuracy of video quality as-sessment
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 opti-mal parameters of congestion control were obtained by solving the semi-Markov decision process. Simulation results re-veal that proposed algorithm achieves better subjective and objective video quality
and obtains well TCP-friendliness ra-tio
compared with the conventional congestion control algorithms.
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references
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