TITRE Adaptive Packet Video Streaming Over IP Networks - LaBRI

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VideoScene (VS) VideoObject (VO) VideoObjectLayer (VOL) GroupOfVOPs (GOV) VideoObjectPlane (VOP) VS 2, VS 3 , ... VS 1 VS VS1 1 VS2 VOP VS 1 1 VOP k VOP VS k+ 1 1 VOP 1 VOP VS 2 1 VO 1 VS VS1 1 VO2 VO 2 ,VO 3 , ... VOL 1 VS VS1 1 VOL2 VOL 2 ,VOL 3 , ... GOV 1 VS VS1 1 GOV2 GOV 2 ,GOV 3 ,... VOP 1 ...VOP k VOP k+1 ...VOPm VOP 1 ...VOP t Layer 1 Layer 2 Figure A-1: Hierarchical composition of an MPEG-4 scene Figure A-2 depicts an MPEG-4 scene, along with the associated object tree structure. The scene shows news broadcast that contains four objects: logo, speaker, background and speech. The final scene is obtained by composition. Scene ObjectDescriptor { OD_ID 1 List of { Elemntary- Stream- Descriptors } } logo ObjectDescriptor { OD_ID 2 List of { Elemntary- Stream- ...... ..... ...... Background Speaker speech Figure A-2: Simple composite MPEG-4 scene using "Akiyo" video sequence A.2 MPEG-4 Layered Architecture MPEG-4 terminal architecture is composed of three layers (see Figure A-3): the Compression Layer, the Sync Layer and the Delivery Layer [22]. 170
Media aware Delivery unaware ISO/IEC 14496-2 ISO/IEC 14496-3 Media unaware Delivery unaware ISO/IEC 14496-1 Media unaware Delivery aware ISO/IEC 14496-6 ISO/IEC 14496-1 Visual Audio System DMIF System Compression Layer Sync Layer Delivery Layer Elementary Stream Interface (ESI) DMIF Application Interface (DAI) Figure A-3: MPEG-4 framework Compression layer generates representation of content data called Elementary Streams (ES), the hierarchical relations; locations and properties of ESs in a representation are described by dynamic set of Object Descriptors (OD). ESs are the basic abstraction for any data source. ODs are themselves conveyed through one or more ESs. MPEG-4 scene is described by Scene Description (SD) information that addresses the organization of AVOs within a scene, in terms of both spatial and temporal location. SD is performed using BIFS, which is a VRML-based language. ESs are partitioned into Access Units (AU) which are defined by MPEG-4 general framework for the framing of semantic entities in ES. An MPEG Access Unit (AU) is the smallest data entity to which timing information is attributed. In case of audio an Access Unit may represent an audio frame and in case of video a picture. For examples, a valid MPEG-4 ES could be an MPEG-1 video, labelled with MPEG-4 system information in its headers. An AU would then be one video frame I, B or P. Those AUs will be labelled with priority information, timing information, and others. An AU is the smallest data entity to which timing information can be assigned. On the Sync layer, AUs are conveyed into a sequence of packets called SL-PDUs. A SL-PDU consists of SL packet header and SL packet payload. The header provides means of continuity checking in case of data loss, carries the time stamps, and associated control information. The SL-PDUs are subsequently transmitted to the Delivery Layer for multiplexing and generating a FlexMux stream. The FlexMux tool is one of the components of the MPEG-4 DMIF. FlexMux is a flexible and simple data multiplexer that accommodates interleaving of SL-PDUs. Two different modes of operation for FlexMux are defined. The first mode is called “Simple Mode” in which one SL-PDU is encapsulated into one FlexMux packet, and the second mode is called “MuxCode Mode” in which one or more SL-PDU are encapsulated into a single “FlexMux” packet. The interface between the Sync layer and the Delivery layer is referred to DAI (DMIF Application Interface) [144]. It offers content location independent procedures for establishing MPEG-4 sessions and access to transport channels such as RTP/UDP/IP. DMIF is primarily an integration framework. It provides default DMIF signaling protocol which corresponding to DNI (DMIF Network Interface). 171
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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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Throughput (Kbits) 3000 2500 2000 1
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4000 3500 3000 2500 2000 1500 1000
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45 40 Original Quality Received Qua
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Chapter 5 5 A Dynamic Packet Video
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The TCM algorithm is based on a tok
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BEGIN Initialize the classification
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User Profile (Token Bucket) Traffic
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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
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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 and 170: TCP/UDP port, our implementation us
Page 171 and 172: Control & Data Plan Video Rate Cont
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: Appendix A A Appendix A: Overview o
Page 189 and 190: A.3.3 Scene Description Streams Sce
Page 191: This appendix presents structure ex
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