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Optimized packet scheduling in multiview video navigation systems

Toni, L; Maugey, T; Frossard, P; (2015) Optimized packet scheduling in multiview video navigation systems. IEEE Transactions on Multimedia , 17 (9) pp. 1604-1616. 10.1109/TMM.2015.2450020. Green open access

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We study coding and transmission strategies in multicamera systems, where correlated sources send data through a bottleneck channel to a central server, which eventually transmits views to different interactive users. We propose a dynamic navigation -path aware packet scheduling optimization under delay, bandwidth, and interactivity constraints aimed at optimizing the quality-of-experience of interactive users. In particular , the scene distortion is minimized jointly with the distortion variations along most likely navigation paths. The optimization relies both on a novel rate-distortion model, which captures the importance of each view in the scene reconstruction , and on an objective function that optimizes resources based on a client navigation model. The latter takes into account the distortion experienced by interactive clients as well as the distortion variations that might be observed by clients during multiview navigation. We solve the scheduling problem with a novel trellis-based solution, which permits to formally decompose the multivariate optimization problem, thereby significantly reducing the computation complexity. Simulation results show the PSNR quality gain offered by the proposed algorithm compared to baseline scheduling policies. Finally, we show that the best scheduling policy consistently adapts to the most likely user navigation path and that it minimizes distortion variations that can be very disturbing for users in traditional navigation systems.

Type: Article
Title: Optimized packet scheduling in multiview video navigation systems
Open access status: An open access version is available from UCL Discovery
DOI: 10.1109/TMM.2015.2450020
Publisher version: http://doi.org/10.1109/TMM.2015.2450020
Language: English
Additional information: © 2015 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works.
Keywords: Navigation, Distortion, Dynamic scheduling, Optimization, Scheduling algorithms, Streaming media, packet scheduling, Correlated sources, interactive multiview streaming, multiview navigation
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng
URI: https://discovery.ucl.ac.uk/id/eprint/1533077
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