Faridi, AzadehEphremides, Anthony2013-02-272013-02-272008Faridi A, Ephremides A. Distortion control for delay-sensitive sources. IEEE Trans. Inf. Theory. 2008; 54(8): 3399-3411. DOI 10.1109/TIT.2008.9263380018-9448http://hdl.handle.net/10230/20430We investigate the problem of finding minimum-distortion policies for streaming delay-sensitive but distortion-tolerant data. We consider cross-layer approaches which exploit the coupling between presentation and transport layers. We make the natural assumption that the distortion function is convex and decreasing. We focus on a single source-destination pair and analytically find the optimum transmission policy when the transmission is done over an error-free channel. This optimum policy turns out to be independent of the exact form of the convex and decreasing distortion function. Then, for a packet-erasure channel, we analytically find the optimum open-loop transmission policy, which is also independent of the form of the convex distortion function. We then find computationally efficient closed-loop heuristic policies and show, through numerical evaluation, that they outperform the open-loop policy and have near optimal performance.application/pdfeng© 2008 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, 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 component of this work in other works./nThe final published article can be found at http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=4567571Arquitectura d'ordinadorsReproducció en temps realinfo:eu-repo/semantics/articlehttp://dx.doi.org/10.1109/TIT.2008.926338Delay-sensitiveDistortionSchedulingSource-codingStreaminginfo:eu-repo/semantics/openAccess