000150668 001__ 150668
000150668 005__ 20180317092055.0
000150668 037__ $$aREP_WORK
000150668 245__ $$aPrioritized Distributed Video Delivery with Randomized Network Coding
000150668 269__ $$a2010
000150668 260__ $$c2010
000150668 336__ $$aReports
000150668 520__ $$aWe address the problem of prioritized video streaming over lossy overlay networks. We propose to exploit network path diversity via a novel Randomized Network Coding (RNC) approach that provides unequal error protection (UEP) to the packets conveying the video content. We design a distributed receiver-driven streaming solution, where a client requests packets from the different priority classes from its neighbours in the overlay. Based on received requests, a node in turn forwards combinations of packets from the different classes to the requesting peers. Selecting a network coding strategy at every node can be cast as an optimization problem that determines the best rate allocation among the different packet classes so that the average distortion at the requesting peer is minimized. As the optimization problem has log-concavity properties, it can be solved by an iterative algorithm, with low complexity. Our simulation results demonstrate that the proposed scheme respects the relative priorities of the different packet classes and achieves a graceful quality adaptation to network resource constraints. Therefore, our scheme substantially outperforms reference schemes such as baseline network coding techniques as well as solutions that employ rateless codes with built-in UEP properties. The performance evaluation additionally provides evidence about the substantial robustness of the proposed scheme in a variety of transmission scenarios.
000150668 6531_ $$aNetwork coding
000150668 6531_ $$arate allocation
000150668 6531_ $$aunequal error protection
000150668 6531_ $$avideo streaming
000150668 6531_ $$aoverlay networks
000150668 6531_ $$aLTS4
000150668 700__ $$aThomos, Nikolaos
000150668 700__ $$0245198$$aCakareski, Jakov$$g168766
000150668 700__ $$0241061$$aFrossard, Pascal$$g101475
000150668 8564_ $$s334837$$uhttps://infoscience.epfl.ch/record/150668/files/UEP-NC-TR.pdf$$yn/a$$zn/a
000150668 909CO $$ooai:infoscience.tind.io:150668$$preport$$pSTI
000150668 909C0 $$0252393$$pLTS4$$xU10851
000150668 917Z8 $$x176186
000150668 917Z8 $$x176186
000150668 917Z8 $$x176186
000150668 937__ $$aEPFL-REPORT-150668
000150668 973__ $$aEPFL$$sPUBLISHED
000150668 980__ $$aREPORT