TITRE Adaptive Packet Video Streaming Over IP Networks - LaBRI

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Figure 6-12: SIP user agent call parameters setup snapshot Our SIP terminal uses also JMF API to add enable audio and Video. Our SIP implementation uses TCP or UDP protocol for signaling. The Figure 6-12 shows a brief snapshot of SIP Terminal when inviting another user to videoconferencing. We’ve used also other SIP terminals [180] and [181] to test our Interworking Server and to verify compatibility issues. 6.4 Conclusion Diversity and heterogeneity of multimedia terminals and services characterize today IP networking environment. Consequently, interworking becomes a critical issue for resolving the differences in these elements and enabling seamless provision of audiovisual applications across networks. Interworking is a way of making different communicating systems cooperate to perform a particular service. Thus, this chapter emphasizes technical issues on call control and session establishment interworking between an ISO DMIF-compliant terminal and IETF SIP-compliant. We described, in this chapter, the design and implementation of an experimental interworking signaling gateway that performs various translation functions between the two signaling protocols, including session protocol conversion, service gateway conversion, and address translation. Multimedia Internet designers may then transparently combine MPEG-4 multimedia content and IP telephony for advance videoconferencing services such as e-learning, e-commerce or collaborative conferencing. Internet users might well have the impression that it is an integrated multimedia service offered by a single Internet site. This is what we call a “seamless IP videoconferencing service interworking”. Current implementation supports both translation modes. 154
Control & Data Plan Video Rate Control Chapter 7 7 Conclusion and Perspectives This chapter concludes the dissertation by summarizing our major contributions and suggesting some key directions for future work. IP networks and services are growing exponentially and are impacting every aspect of modern life. Video and audio applications are expected to become a significant portion of World Wide Web, but nevertheless, supporting multimedia applications in the current IP networks is still in its immaturity. The IETF is proposing two QoS management architectures, namely integrated services and differentiated services, to meet the demand of multimedia applications over IP. Besides these technologies are still under development and not yet widely deployed. IP Diffserv model is gaining more and more interests from the telecommunication and networking industry (i.e. Diffserv/ MPLS based backbones). Therefore in this dissertation, we have explored methods and solutions that can be used for improving user perceived quality of interactive video streaming applications over IP Diffserv. We leverage the characteristics of MPEG-4 standard and IP differentiated service frameworks, to propose an efficient and adaptive cross-layer video delivery system. 7.1 Summary of Key Result Figure 7-1 depicts an overall view of the proposed end-to-end video QoS management system architecture with the associated functional blocks. Signaling Plan Local App DAI MPEG-4 Local DMIF for Remote srv DNI Transmission rate SIG MAP DMIF2SIP SIP2DMIF Interworking Gateway Object Layers Session Initiation Protocol Audio-Visual Objects AVO 1 L 1,1 L 2,1 . + AVO 2 . . AVO j L j,k AVO n L 1,n Classification Module smoothing ALF Module TFRC RT P + Unequal FEC IP Diffserv Marker IP Diffserv Network RTP RTCP L 1,1 L 1,2 L 1,m1 L 2,1 L 2,2 L 2,m2 L n,1 L n,2 L n,mn AVO 1 Decoder AVO 2 Decoder AVO n Decoder AVO Composition Player VoD Server VoD Client Figure 7-1: General block diagram of our end-to-end architecture Our cross-layer video streaming system is composed of a video server and a video client communicating using IP Diffserv network. The video server is able to stream audio-visual objects for various heterogeneous clients using RTP protocol. The client decodes and composes the 155
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UNIVERSITÉ DE VERSAILLES SAINT-QUE
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Résumé Nous constatons aujourd’
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3 Related Work ....................
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5.5.1.2 Simulation Results.........
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List of Figures Figure 1-1: Structu
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Figure 5-15: End-to-end packet tran
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Acknowledgments The first person I
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[11] Toufik Ahmed, Guillaume Burida
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d’accès. Les interactions de QoS
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Métrique MAX_DELAY PREF_MAX_DELAY
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1.1.2 Proposition dun Protocole d'E
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des paquets RTP. Reste toujours le
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Nous pouvons distinguer trois possi
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1.1.2.5.2 Multiplexage des Flux El
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l’horloge est par défaut égale
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La valeur R TCP représente le déb
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Pour ces raisons, nous nous intére
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Telles que illustrés par la Figure
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3. DMIF2SIP vérifie si son propre
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utilisée optionnellement pour loca
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Chapter 2 2 Introduction 2.1 Motiva
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conditions. Based on end-to-end fee
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Chapter 3 3 Related Work Nowadays,
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• multicasting: it takes the stre
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expensive, fixed delivery and recep
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3.1.6 Static vs. Dynamic Channels T
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environment because they require a
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H.261 is called video codec for aud
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VideoScene (VS) VideoObject (VO) Vi
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The emphasis of MPEG-7 will be the
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Temporal scalability involves parti
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multitude of streams. It can switch
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increased linearly in the absence o
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3.2.2.1 End-to-End Retransmission R
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correctly received block. The missi
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epresent user traffic. The delay ca
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3.2.5 IP Signaling Protocols for Pa
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two H.323 endpoints or between an e
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Chapter 4 4 Adaptive Packet Video T
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4.1.1 Video Classification Model Pr
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attributes can refer to the QoS par
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In RBF, 2 D = X − is the distance
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Figure 4-6: Experiment testbed In t
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190 180 170 End-to-end delay MPEG-4
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Sync Layer. The SL-packetized strea
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conveyed by MIME format parameters
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the same value. This timing informa
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4.2.2.1 Fragmentation We propose to
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Timestamp: Indicates the sampling i
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When G is used as generator matrix,
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4.2.3 Performance Evaluation Intens
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0.3 0.25 our proposal classical app
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lost packet at the receiver. Conseq
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marking scheme. The server must be
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The video server adds audio-visual
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Marker (TR3CM) [131] to mark the ba
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VO1 VO2 AVO Scenario Audio BL EL1 E
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Throughput (Kbits) 3000 2500 2000 1
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Page 123 and 124: 45 40 Original Quality Received Qua
Page 125 and 126: Chapter 5 5 A Dynamic Packet Video
Page 127 and 128: The TCM algorithm is based on a tok
Page 129 and 130: BEGIN Initialize the classification
Page 131 and 132: User Profile (Token Bucket) Traffic
Page 133 and 134: 5.3.3 QoS Management Algorithm Spec
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Page 137 and 138: • Filters: to put packets into cl
Page 139 and 140: mechanism associated with the Drop
Page 141 and 142: Figure 5-16: Packets loss with IP D
Page 143 and 144: 5.5.2.3 Experimental Results Figure
Page 145 and 146: 1 MPEG-4 Based Layer Stream -AF11 M
Page 147 and 148: 0.2 0.18 MPEG-4 Based Layer Stream
Page 149 and 150: By using our PBNM tool, we allocate
Page 151 and 152: Id Condition Indicator Action 1 Net
Page 153 and 154: The proposed marking algorithm bett
Page 155 and 156: Chapter 6 6 A SIP/MPEG-4 Multimedia
Page 157 and 158: performed by many ways like SLA (Se
Page 159 and 160: 6.1.1.4 SIP Communication Model SIP
Page 161 and 162: • It assign a value (network sess
Page 163 and 164: 6.2.1 SIP2DMIF Subsystem The SIP2DM
Page 165 and 166: Step 1: The MPEG-4 Terminal passes
Page 167 and 168: 1. Set the result C to the empty se
Page 169: TCP/UDP port, our implementation us
Page 173 and 174: characteristics and relevance of ea
Page 175 and 176: References [1] Kazaa Media Desktop
Page 177 and 178: [43] B. Schuster, “Fine granular
Page 179 and 180: [79] D. Bansal and H. Balakrishnan,
Page 181 and 182: [115] N. Laoutaris, I. Stavrakakis,
Page 183 and 184: [154] W. Almesberger, J. H. Salim,
Page 185 and 186: Appendix A A Appendix A: Overview o
Page 187 and 188: Media aware Delivery unaware ISO/IE
Page 189 and 190: A.3.3 Scene Description Streams Sce
Page 191: This appendix presents structure ex
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