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Joint energy-distortion aware algorithms for cooperative video streaming over LTE networks

SIGNAL PROCESSING-IMAGE COMMUNICATION 2013年第9期28卷 1114-1131页

作者： Yaacoub, Elias Dawy, Zaher Sharafeddine, Sanaa Abu-Dayya, Adnan Qatar Sci & Technol Pk QMIC Doha Qatar Amer Univ Beirut Dept Elect & Comp Engn Beirut Lebanon LAU Dept Comp Sci & Math Beirut Lebanon

Real-time video streaming over long-term evolution (LTE) networks is investigated in the presence of mobile-to-mobile collaboration. A multi-objective problem for energy and distortion minimization is formulated and an energy-efficient, quality of service (QoS) aware suboptimal approach is presented for collaborative video transmission. In the proposed approach, mobiles are grouped into collaborative clusters using a low-complexity clustering algorithm. In each cluster, collaboration is implemented by having a cluster head send the content to other cluster members using a short-range wireless communications technology. The cluster heads receive the data on the long-range LTE links, either via unicasting or multicasting. LTE scheduling is taken into account on the long range transmissions. Videos with single description coding (SDC), multiple description coding (MDC), and scalable video coding (SVC) are considered. Results show that the proposed approach leads to significant energy savings and enhanced QoS compared to the non-collaborative scenario. Furthermore, MDC is shown to outperform SDC in terms of QoS, at the cost of a slight increase in energy consumption. The same conclusions were reached with respect to SVC compared to single layer coding. (c) 2013 Elsevier B.V. All rights reserved.

关键词： Video streaming multiple description coding Scalable video coding Cooperative communications Energy efficiency LTE

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Lattice-Based Robust Distributed Source coding for Three Correlated Sources

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IEEE TRANSACTIONS ON COMMUNICATIONS 2020年第7期68卷 4089-4103页

作者： Dumitrescu, Sorina Elzouki, Dania Chen, Jun McMaster Univ Dept Elect & Comp Engn Hamilton ON L8S 4K1 Canada

The problem of robust distributed source coding for three correlated sources is studied in this work. A lattice-based scheme is proposed and the analysis of its performance is provided in the high resolution regime. Special attention is paid to the degenerate case where the three sources are Gaussian and identical. In this case, our scheme is shown to achieve within an asymptotic gap of 0.069 bits in terms of rate per description from the information-theoretic limit of quadratic symmetric Gaussian multiple description coding with central and individual decoders, when the side distortion and the ratio between the central and side distortions both approach 0.

关键词： Lattices Decoding Robustness Source coding Distortion Indexes Correlated sources distributed source coding lattice quantization asymptotic performance analysis high resolution multiple description coding

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multiple descriptions Based on Multirate coding for JPEG 2000 and H.264/AVC

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IEEE TRANSACTIONS ON IMAGE PROCESSING 2010年第7期19卷 1756-1767页

作者： Tillo, Tammam Baccaglini, Enrico Olmo, Gabriella Univ Liverpool Dept Elect & Elect Engn Xian Jiaotong Suzhou 215123 Peoples R China Politecn Torino Dipartimento Elettron I-10129 Turin Italy

multiple description coding (MDC) makes use of redundant representations of multimedia data to achieve resiliency. descriptions should be generated so that the quality obtained when decoding a subset of them only depends on their number and not on the particular received subset. In this paper, we propose a method based on the principle of encoding the source at several rates, and properly blending the data encoded at different rates to generate the descriptions. The aim is to achieve efficient redundancy exploitation, and easy adaptation to different network scenarios by means of fine tuning of the encoder parameters. We apply this principle to both JPEG 2000 images and H.264/AVC video data. We consider as the reference scenario the distribution of contents on application-layer overlays with multiple-tree topology. The experimental results reveal that our method favorably compares with state-of-art MDC techniques.

关键词： Error resilience H.264/AVC image processing JPEG 2000 multiple description coding

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Tree-structured oversampled filterbanks as joint source-channel codes: Application to image transmission over erasure channels

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IEEE TRANSACTIONS ON SIGNAL PROCESSING 2004年第9期52卷 2584-2599页

作者： Motwani, R Guillemot, C Data Storage Inst Singapore Singapore Natl Univ Singapore Singapore 117548 Singapore INRIA IRISA F-35042 Rennes France

This paper studies oversampled filterbanks for robust transmission of multimedia signals over erasure channels. Oversampled filterbanks implement frame expansions of signals in l(2)(Z). The dependencies between the expansion coefficients introduced by the oversampled filterbank are first characterized both in the z-domain and in the time-domain. Conditions for recovery of some typical erasure patterns like bursty erasure patterns are derived. The analysis leads to the design of two erasure recovery algorithms that are first studied without quantization noise. The reconstruction algorithm derived from the time-domain analysis exploits the fact that an oversampled filterbank represents signals with more than one set of basis functions. The erased samples are first reconstructed from the received ones, and then, signal space projection is applied. The effect of quantization noise on the reconstructed signal is studied for both algorithms. Using image signals, the theoretical results are validated for a number of erasure patterns, considering unequal error protection enabled tree-structured decompositions.

关键词： erasure resilient coding frames joint source-channel coding multiple description coding oversampled filterbanks

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Grassmannian frames with applications to coding and communication

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APPLIED AND COMPUTATIONAL HARMONIC ANALYSIS 2003年第3期14卷 257-275页

作者： Strohmer, T Heath, RW Univ Calif Davis Dept Math Davis CA 95616 USA Univ Texas Dept Elect & Comp Engn Austin TX 78727 USA

For a given class F of unit norm frames of fixed redundancy we define a Grassmannian frame as one that minimizes the maximal correlation \\ among all frames {f(k)}(kis an element ofI) is an element of F. We first analyze finite-dimensional Grassmannian frames. Using links to packings in Grassmannian spaces and antipodal spherical codes we derive bounds on the minimal achievable correlation for Grassmannian frames. These bounds yield a simple condition under which Grassmannian frames coincide with unit norm tight frames. We exploit connections to graph theory, equiangular line sets, and coding theory in order to derive explicit constructions of Grassmannian frames. Our findings extend recent results on unit norm tight frames. We then introduce infinite-dimensional Grassmannian frames and analyze their connection to unit norm tight frames for frames which are generated by group-like unitary systems. We derive an example of a Grassmannian Gabor frame by using connections to sphere packing theory. Finally we discuss the application of Grassmannian frames to wireless communication and to multiple description coding. (C) 2003 Elsevier Science (USA). All rights reserved.

关键词： frame Grassmannian spaces spherical codes Gabor frame multiple description coding unit norm tight frame conference matrix equiangular line sets unitary system

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A Cross-Layer Design Framework for Robust IPTV Services Over IEEE 802.16 Networks

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IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS 2009年第2期27卷 235-245页

作者： She, James Yu, Xiang Ho, Pin-Han Yang, En-Hui Univ Waterloo Dept Elect & Comp Engn Waterloo ON N2L 3G1 Canada

This paper introduces a cross-layer design framework for robust and efficient video multicasting over IEEE 802.16 (also known as WiMAX) networks in metropolitan areas. In the framework, multiple description coding (MDC) on scalable video bitstreams at the source for achieving multi-resolution robustness is jointly designed with superposition coding (SCM) on multicast signals at the channel to overcome multi-user channel diversity in wireless multicast. The ended multicast signals under the proposed framework can cope with multi-user channel diversity and mitigate the impact due to short-term channel fluctuations, which are the two most challenging issues in achieving robust and efficient video multicasting in metropolitan areas. We formulate the proposed framework and analyze its video quality performance in terms of the total receivable/recoverable bitstreams by a receiver. A heuristic methodology is developed for system parameter selection and performance optimization that can be applied to practical scenarios of video multicasting for IPTV services in WiMAX. Simulation is conducted based on actual standard video sequences to verify the proposed methodology on parameter selection anti performance optimization. Performance gains of the proposed cross-layer design framework in the presence of fading channel diversity are demonstrated..

关键词： Cross-layer design IEEE 802.16 IPTV multiple description coding scalable video coding superposition modulation WiMAX wireless multicast

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Ensuring quality of service for image transmission: Hybrid loss protection

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IEEE TRANSACTIONS ON IMAGE PROCESSING 2004年第6期13卷 751-757页

作者： Grangetto, M Magli, E Olmo, G Politecn Torino Dipartimento Elettron Ctr Multimedia Radio Commun CERCOM I-10129 Turin Italy

We present hybrid loss protection as a new channel coding and packetization scheme for image transmission over nonprioritized lossy packet networks. The scheme employs an interleaver-based structure, and attempts to maximize the expected peak signal-to-noise ratio (PSNR) at the receiver given the constraint that the probability of failure, i.e., the probability that the PSNR of the decoded image is below a given threshold, is upper-bounded by a user-defined value. A new code-allocation algorithm is proposed, which employs Gilbert-Elliot modeling of the network statistics. Experimental results are provided in the case of transmission of images encoded by SPIHT and JPEG 2000 over a wireline, as well as a wireless UNITS-based Internet connection.

关键词： image transmission joint source and channel coding JPEG 2000 multiple description coding quality of service SPIHT unequal loss protection

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Algorithms for Server Placement in multiple-description-Based Media Streaming

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IEEE TRANSACTIONS ON MULTIMEDIA 2008年第7期10卷 1382-1392页

作者： Ahuja, Satyajeet Krunz, Marwan Univ Arizona Dept Elect & Comp Engn Tucson AZ 85721 USA

multiple description coding (MDC) has emerged as a powerful technique for reliable real-time communications over lossy packet networks. In its basic form, it involves encoding a media stream into r substreams that are sent independently from a source to a destination. Each substream (or description) can be decoded independent of the other r - 1 substreams. With every successful reception of a substream, the quality of the decoded signal improves. In this paper, we consider the problem of placing a set of servers in the network such that a desired quality of service can be provided to a community of clients that request MDC-coded traffic. We formulate the server placement (SP) problem, with the goal of identifying the minimum number of server locations that can provide r descriptions to a set of clients such that the delay associated with each path from a chosen server location to a given client is bounded by a given delay constraint and the total "unreliability" associated with the group of paths to a given client is also upper bounded. We show that the SP problem belongs to the class of NP-complete problems. We propose a mixed-integer linear programming (MILP) formulation and an efficient heuristic solution for the SP problem. Simulations are conducted to evaluate the performance of the proposed algorithm and compare it with the optimal solution provided by the MILP solution.

关键词： multiple description coding path diversity

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Adaptive FEC-based packet loss resilience scheme for supporting voice communication over ad hoc wireless networks

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IEEE TRANSACTIONS ON MOBILE COMPUTING 2008年第10期7卷 1184-1199页

作者： Gandikota, Venkat Raju Tamma, Bheemarjun Reddy Murthy, C. Siva Ram Yahoo Software Dev India Pvt Ltd Bangalore 560001 Karnataka India Indian Inst Technol Dept Comp Sci & Engn Madras 600036 Tamil Nadu India Univ Calif San Diego Jacobs Sch Engn La Jolla CA 92093 USA

Providing real-time voice support over multihop ad hoc wireless networks (AWNS) is a challenging task. The standard retransmission-based strategies proposed in the literature are poorly matched to voice applications because of timeliness and large overheads involved in transmitting small-sized voice packets. To make a voice application feasible over AWNS, the perceived voice quality must be improved while not significantly increasing the packet overhead. We suggest packet-level media-dependent adaptive forward error correction (FEC) at the application layer in tandem with multipath transport for improving the voice quality. Since adaptive FEC masks packet losses in the network, at the medium access control (MAC) layer, we avoid retransmissions (hence, no acknowledgments) in order to reduce the control overhead and end-to-end delay. Further, we exploit the combined strengths of layered coding and multiple description (MD) coding for supporting error-resilient voice communication in AWNS. We propose an efficient packetization scheme in which the important substream of the voice stream is protected adaptively with FEC depending on the loss rate present in the network and is transmitted over two maximally node-disjoint paths. The less important substream of the voice stream is encoded into two descriptions, which are then transmitted over two maximally node-disjoint paths. The performance of our scheme (packet-level media-dependent adaptive FEC scheme) is evaluated in terms of two parameters: residual packet loss rate (RPLR, packet loss rate after FEC recovery) and average burst length (ABL, average length of consecutive packet losses after FEC recovery) of voice data after FEC recovery. The sets of equations leading to the analytical formulation of both RPLR and ABL are first given for a renewal error process. The values of both these parameters depend on FEC-Offset (r, the distance between original voice frame and piggybacked redundant voice frame) and loss rate prese

关键词： ad hoc networks voice frame layered coding multiple description coding forward error correction packetization scheme voice quality multipath transport multimedia

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Asymptotical Analysis of Several multiple description Scenarios with L ≥ 3 descriptions

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IEEE TRANSACTIONS ON COMMUNICATIONS 2014年第4期62卷 1358-1372页

作者： Dumitrescu, Sorina Zheng, Ting McMaster Univ Dept Elect & Comp Engn Hamilton ON Canada

This work compares theoretically the performance of several representative practical multiple description (MD) frameworks with L >= 3 symmetric descriptions. The first scenario is the classic unequal erasure protection (UEP) scheme using a successively refinable code (SRC) and Reed-Solomon codes. The second scenario is an improvement upon UEP by applying domain partitioning and permuted Reed-Solomon codes. The third scenario uses a finer partitioning and erasure correction via repetition codes. Additionally, the MD lattice vector quantizer and another recent MD scheme are considered in the comparison. The aforementioned MD schemes are compared in terms of the expected squared error asymptotically achievable as the rate R of a description approaches infinity, assuming independent description losses. Our analysis reveals that the improvement of the second scenario upon the first one when R -> infinity can reach up to 1.68 dB, but it approaches 0 as the description loss rate p goes to 0 and L approaches infinity. Additionally, we find that the first two schemes outperform the third one with an unbounded gain when R -> infinity, as p -> 0 or L -> infinity. Further, we show that the first three scenarios achieve unbounded improvements over the other two as R -> infinity and p -> 0. On the other hand, we point out that some of the results of our asymptotic analysis rely on strong assumptions and therefore an experimental validation is needed before applying them to practical situations.

关键词： multiple description coding asymptotical distortion analysis high resolution assumption

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