期刊
JOURNAL OF VISUAL COMMUNICATION AND IMAGE REPRESENTATION
卷 77, 期 -, 页码 -出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/J.JVCIR.2020.102999
关键词
Visual communications; Video coding; Lyapunov optimization; Heterogeneous wireless networks; Multi-homing; Rate control
资金
- National Natural Science Foundation for Young Scholars of China [61801120]
- National Natural Science Foundation of China [61561014, 61671153]
- Fujian Natural Science Foundation [2018J05104]
This study introduces a novel long-term rate control scheme that significantly improves video quality and reduces delay by taking into account the transmission buffer and video frame statuses.
Concurrent multipath transmission provides an effective solution for streaming high-quality mobile videos in heterogeneous wireless networks. Rate control is commonly adopted in multimedia communication systems to fully utilize the available network bandwidth. This paper proposes a novel rate control for concurrent multipath video transmission. The existing rate control algorithms mainly adapt bit rate in the short-term pattern, i.e., without considering the long-term video transmission quality. We propose a long-term rate control scheme that takes into account the status of both the transmission buffer and video frames. First, a mathematical model is developed to formulate the non-convex problem of long-term quality maximization. Second, we develop a dynamic programming solution for online encoding bit rate control based on buffer status. The performance evaluation is conducted in a real test bed over LTE and Wi-Fi networks. Experimental results demonstrate that the proposed long-term rate control scheme achieves appreciable improvements over the short-term rate control schemes in terms of video quality and delay performance.
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