TITRE Adaptive Packet Video Streaming Over IP Networks - LaBRI

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A.3.9 IPI_DescPointer IPI_DescPointer class contains a reference to the elementary stream that includes the IP Identification Data Set(s) that are valid for this stream. This indirect reference mechanism allows conveying IP_IdentificationDataSet elements only in one elementary stream while making references to it from any ES_Descriptor that shares the same IP Identification Data. A.3.10 QoS Descriptor In our studies, QoS_descriptor is the important parameters of the classification. QoS_descriptor conveys the requirements that the ES has on the transport channel and a description of the traffic that this ES will generate. Table A-1 shows QoS parameters used in the OD of an ES. The unit of each metric is specified in Table A-2. QoS Metric Synthetic Description MAX_DELAY Absolute maximum end to end delay for the stream PREF_MAX_DELAY Preferred maximum end to end delay for the stream LOSS_PROB Allowable loss probability of any single AU. MAX_GAP_LOSS Maximum allowable number of consecutively lost Aus MAX_AU_SIZE Maximum size of an AU AVG_AU_SIZE Average size of an AU MAX_AU_RATE Maximum arrival rate of Aus PRIORITY Priority for the stream Table A-1: List of defined QoS metrics in MPEG-4 object descriptor QoS_QualifierTag Type Unit PRIORITY Byte Higher values mean higher priority MAX_DELAY Long Microseconds AVG_DELAY Long Microseconds LOSS_PROB Double Fraction (0.00 – 1.00) MAX_GAP_LOSS Long Integer number of Access Units (AU) MAX_AU_SIZE Long Bytes MAX_AU_RATE Long AUs/second AVG_AU_SIZE Double Bytes Table A-2: Metrics data syntax A.3.11 ExtensionDescriptor Additional descriptors may be defined using the syntax in the class definitions above. Depending on the value of the class tag, the maximum length of the descriptor can be either 2 8 -1, 2 16 -1 or 2 32 -1 byte. A terminal that conforms to this specification may ignore these descriptors. The available class tag values for extension descriptors allow ISO defined extensions as well as private extensions. A.3.12 RegistrationDescriptor The registration descriptor provides a method to uniquely and unambiguously identify formats of private data streams. 174
This appendix presents structure example of MPEG-4 Object Descriptor containing H263 video and G723 audio elementary streams. Each stream is described by an ObjectDescriptor, this later, contains a QoS_Descriptor. A.4 Example of an Object Descriptor This example presents an MPEG-4 scene composed of an H263 video and G723 audio elementary streams. Each stream is described by an ObjectDescriptor record, this later, contains the following QoS_Descriptor. ObjectDescriptor { objectDescriptorID 2 es_descriptor ES_Descriptor { es_Number 1 decConfigDescr DecoderConfigDescriptor { streamType 5 // VisualStream bufferSizeDB 16000 specificInfo H263 }² alConfigDescr ALConfigDescriptor { useAccessUnitEndFlag TRUE useRandomAccessPointFlag TRUE useTimeStampsFlag TRUE timeStampResolution 1000 timeStampLength 10 } QoS_Descriptor { streamPriority 0 max_delay 150 pref_max_delay 100 loss_prob 0.001 } } } ObjectDescriptor { objectDescriptorID 3 es_descriptor ES_Descriptor { es_Number 1 decConfigDescr DecoderConfigDescriptor { streamType 6 bufferSizeDB 500 specificInfo G723 // AudioStream } alConfigDescr ALConfigDescriptor { timeStampResolution 1000 accessUnitRate 30 } IPI_Descriptor { IPI_ES_Id 0 } QoS_Descriptor { streamPriority 0 max_delay 350 pref_max_delay 250 loss_prob 0.01 } } 175
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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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Figure 5-7: Hierarchical aggregatio
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• 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 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 and 186: Appendix A A Appendix A: Overview o
Page 187 and 188: Media aware Delivery unaware ISO/IE
Page 189: A.3.3 Scene Description Streams Sce
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