TY - GEN
T1 - QoE-based multi-stream scalable video adaptation over wireless networks with proxy
AU - Hu, Hao
AU - Zhu, Xiaoqing
AU - Wang, Yao
AU - Pan, Rong
AU - Zhu, Jiang
AU - Bonomi, Flavio
PY - 2012
Y1 - 2012
N2 - In this paper, we present a proxy-based solution for adapting the scalable video streams at the edge of a wireless network, which can respond quickly to highly dynamic wireless links. Our design adopts the scalable video coding (SVC) technique for lightweight rate adaptation at the edge. We derive a QoE model, i.e., rate-quality tradeoff model, that relates the maximum subjective quality under a given rate by choosing the optimal frame rate and quantization stepsize. The proxy iteratively allocates rates of different video streams to maximize a weighted sum of video qualities associated with different streams, based on the periodically observed link throughputs and the sending buffer status. Simulation studies show that our scheme consistently outperforms TFRC in terms of agility to track link qualities and overall quality of all streams. In addition, the proposed scheme supports differential services for different streams, and competes fairly with TCP flows.
AB - In this paper, we present a proxy-based solution for adapting the scalable video streams at the edge of a wireless network, which can respond quickly to highly dynamic wireless links. Our design adopts the scalable video coding (SVC) technique for lightweight rate adaptation at the edge. We derive a QoE model, i.e., rate-quality tradeoff model, that relates the maximum subjective quality under a given rate by choosing the optimal frame rate and quantization stepsize. The proxy iteratively allocates rates of different video streams to maximize a weighted sum of video qualities associated with different streams, based on the periodically observed link throughputs and the sending buffer status. Simulation studies show that our scheme consistently outperforms TFRC in terms of agility to track link qualities and overall quality of all streams. In addition, the proposed scheme supports differential services for different streams, and competes fairly with TCP flows.
UR - http://www.scopus.com/inward/record.url?scp=84871959623&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84871959623&partnerID=8YFLogxK
U2 - 10.1109/ICC.2012.6364897
DO - 10.1109/ICC.2012.6364897
M3 - Conference contribution
AN - SCOPUS:84871959623
SN - 9781457720529
T3 - IEEE International Conference on Communications
SP - 7088
EP - 7092
BT - 2012 IEEE International Conference on Communications, ICC 2012
T2 - 2012 IEEE International Conference on Communications, ICC 2012
Y2 - 10 June 2012 through 15 June 2012
ER -