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Protocols for Multimedia Systems - Multimedia Networking, 1997. Proceedings., IEEE Conference on

Date 27-27 Nov. 1997

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  • Proceedings of International Conference on Protocols for Multimedia Systems - Multimedia Networking

    Publication Year: 1997
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    Freely Available from IEEE
  • Author index

    Publication Year: 1997 , Page(s): 287 - 288
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    Freely Available from IEEE
  • A strategy for comparing reliable multicast protocols applied to RMNP and CTES

    Publication Year: 1997 , Page(s): 46 - 55
    Cited by:  Papers (1)
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    An increasing number of networked multimedia applications do require a reliable multicast service to support the distribution of data to a potentially large number of receivers, where the receivers may be located in a sparse mode over a WAN network. Designing a reliable multicast protocol is certainly a challenging task, and the literature is abundant in proposals with different approaches to the problem. Because of the large number of proposals, and considering that none of them appears to be clearly superior to the others, a quantitative performance comparison is required to find out their strengths and drawbacks. As the complexity of the algorithms and protocols is quite high, analytical approaches may be ruled out. A simulation approach may provide acceptably reliable results as long as it is built following the more or less well established guidelines. However, building up the model of the system to be simulated in a way that it assures fairness in the comparison of “competing” reliable multicast protocols requires a detailed study. A strategy to compare different approaches to reliable multicast is presented. This strategy has been applied to a concrete case, by comparing two state-of-the-art protocols: reliable multicast network protocol (RMNP) and control tree based on end systems (CTES) View full abstract»

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  • Querying multimedia presentations

    Publication Year: 1997 , Page(s): 64 - 73
    Cited by:  Papers (1)  |  Patents (7)
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    We examine the querying requirements of large libraries of multimedia presentations. Given these requirements, we examine work on querying temporal and sequence data, and identify the similarities and dissimilarities between presentations and these other forms of data. From this analysis, we propose an integrated composition and query capability to permit the reuse of multimedia objects, presentations and presentation segments. The query facility permits content and attribute based queries along with queries over temporal synchronization characteristics. The main contributions of our work are: it addresses both determinant and indeterminant intervals; it permits querying over presentation libraries with heterogeneous structure; it builds on work from temporal and sequence database to address the unique semantics of presentations View full abstract»

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  • An ATM access network for multimedia communications

    Publication Year: 1997 , Page(s): 182 - 189
    Cited by:  Papers (2)
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    In an ATM customer premises network, there is advantage in having shared access across the one broadband user network interface (UNI). We consider ATM shared access issues based on the generic flow control (GFC) protocols as network support for multimedia communications, and we propose a mechanism for shared-medium access to an ATM/B-ISDN network to support multimedia traffic. The access scheme proposed is based on direct access to a slotted medium on a ring network. By installing insertion buffers at each station one reduces media access time, and the spatial reuse by the destination release procedure increases the throughput. The proposed reset-window with buffer insertion includes prioritized access for multimedia communications transport. This access protocol is described and its performance is analyzed. The mean cell access delay and the fair sharing of the non-guaranteed bandwidth are evaluated by simulation View full abstract»

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  • Advanced facilities for remote performance and QoS analysis of communication applications

    Publication Year: 1997 , Page(s): 249 - 252
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    This paper is focused on functional aspects and practical experience with a new communication toolset (CM-Toolbox) offering advanced facilities for remote performance and quality of service (QoS) analysis of communication applications. The key point are features intended to support the emerging requirements of multimedia applications and advanced communication technologies for performance and traffic analysis. Such features include management of network scenarios and application test suites on remote hosts, provision of a standard set of communication applications, their bundling and configuration using traffic and flow control parameters, QoS measurement and testing functions. The QoS testing based on selection of measurement points and specification of QoS evaluations dependent on the application specifics and user demands is addressed. The use of these facilities for flexible QoS and performance test of applications is discussed and illustrated using practical experiments View full abstract»

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  • A DAVIC-based architecture for hypermedia applications over the Internet

    Publication Year: 1997 , Page(s): 4 - 10
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    This paper presents an architecture aimed at supporting distributed hypermedia applications focusing on the exchange of multimedia objects over the Internet, their processing and presentation. The model is based on the Digital Audio-Visual Council (DAVIC) proposals for interactive TV, which means that the Multimedia and Hypermedia information coding Expert Group (MHEG-5) is adopted as the representation standard for multimedia objects and the Digital Storage Media Command and Control (DSM-CC) as the real time protocol for data delivery View full abstract»

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  • QOS based multicast communications

    Publication Year: 1997 , Page(s): 162 - 171
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    In a distributed multimedia integration environment, there is a need for transmission control methods based on real-time communication protocols, that provide a relative quality of service (QOS) to allow a variety of receiving capacities for group members and their requests and that provide a dynamic QOS to cope with temporary CPU overload and network congestion. Therefore, this study proposes a cooperative control method for end-to-end QOS control at a transport layer and for point-to-point control at a network layer. The former is mainly a set of flow-monitoring and flow-adjusting functions, and the latter a set of flow-control functions. The flow-adjusting functions provide in-depth evaluation of (1) the characteristics of the transmission data, (2) end-to-end network performance, and (3) the requirements of receiver applications. The appropriate QOS levels and flow control methods are then determined on the basis of the results View full abstract»

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  • A switchable session management for the distributed multimedia-on-demand system

    Publication Year: 1997 , Page(s): 102 - 111
    Cited by:  Patents (1)
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    We describe the content-based session management with respect to a distributed multimedia-on-demand system. An optimization technique for the switchable session management mechanism has been proposed using a selective admission algorithm performed by the session manager, which manages the session-related resources. This mechanism has been designed and evaluated for the optimal BHSA (busy hour session admission), represented by blocking rate and QoS (quality of service) confidence level determined by the frame rate and blocking rate, and, at the same time, the maximum number of simultaneous media streams. A centralized gateway to administrate the QOS supports this mechanism so that session can be switched due to the admission policy. The user application gains the effective QOS as for the distribution and redundancy of the contents. For maximizing the global throughput, it is necessary to allocate contents effectively into proper storage devices through smoothing the unbalanced utilization. As a result of simulation, it has been verified that the proposed mechanism for the content-based session management enhance the BHSA and QoS confidence level View full abstract»

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  • Temporal relations in multimedia objects: WWW presentation from HyTime specification

    Publication Year: 1997 , Page(s): 84 - 91
    Cited by:  Papers (1)
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    The representation of temporal relations in multimedia objects is based on models of time that allow the identification and the specification of temporal relations among different media, particularly those relations relevant to the process of multimedia synchronization. Initially, this paper discusses the use of HyTime for the specification of binary temporal relations. Next, it discusses an approach to the automatic transformation of the HyTime synchronization specifications into elements to be presented in the context of the World Wide Web environment View full abstract»

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  • An implementation of DSM-CC user-to-network protocol in a DAVIC VOD system: the IMPRESS

    Publication Year: 1997 , Page(s): 11 - 16
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    The IMPRESS (Interactive multimedia exPRESS) system is a DAVIC (Digital Audio-Visual Council) compliant service platform for providing users with interactive multimedia services such as movie on demand and home shopping. The IMPRESS system includes various component systems such as STU (set top unit), delivery network, SRM (session and resource manager), application server, and video pump. For the purpose of managing sessions and resources in the IMPRESS system, we have implemented DSM-CC UN (Digital Storage Media Command and Control user-to-network) protocol. We describe the architecture of the IMPRESS system and the implemented DSM-CC UN session control sequences and resources View full abstract»

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  • Routing with QoS constraints in integrated services networks

    Publication Year: 1997 , Page(s): 152 - 161
    Cited by:  Papers (1)  |  Patents (1)
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    Though the complexity for finding QoS guaranteed route in an integrated services network is proved to be NP-complete, the proof has been done without the assumption of any specific service discipline. Because each service discipline has different QoS bound computation expressions, we propose that the QoS routing algorithm should be designed for specific service discipline used. We then present a proof that, when the considered QoS constraints are bandwidth, delay, delay jitter, and loss free, by employing the weight fair queueing (WFQ) service discipline, the complexity of the problem could be reduced to that of shortest path routing without any QoS constraints. Therefore we can search such a multiple QoS constrained route in polynomial time. We also present a routing algorithm (called “QoSRBF” ), which is a modified version of Bellman-Ford. QoSRBF can, not only successfully find the route that can satisfy the required QoS constraints, but also utilize resources wisely to minimize the call blocking probability for future calls View full abstract»

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  • QoS support for advanced RPC interactions

    Publication Year: 1997 , Page(s): 245 - 248
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    QoS support is necessary for nearly every communication between computers. We present an approach for supporting request response communication behavior with particular respect to an ATM LAN environment. The goal is to extend the RPC protocol with mechanisms for QoS-specification mapping and -monitoring for the effective transmission of data in such an ATM environment. As a first basis for validating our conceptual work, we present a facility to transmit multimedia data by extending the RPC pipe mechanism View full abstract»

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  • @INGate: integrating telephony and Internet

    Publication Year: 1997 , Page(s): 261 - 264
    Cited by:  Patents (10)
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    This paper presents a distributed IN architecture called @INGate that allows users to access a common mailbox from both the Internet side using standard e-mail and WWW frontends and from the telephony side using fixed and mobile telephones and fax machines. The core of this new architecture is the network-bridge service node (NB-SN), a distributed intelligent network (IN) element consisting of a channel matrix switch (CMS) to connect to the PSTN/ISDN, several resource platforms (RP) containing media conversion modules (MCM) to perform the required media translations, an Internet gateway (IG) to hold the subscribers' mailboxes and provide the Internet connectivity, and a service node controller (SNC) to manage the overall service logic and the above NB-SN components. The service node itself is managed along with other nodes in a distributed IN by a TMN-compliant operation, administration and maintenance (OAM) center View full abstract»

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  • Earliest due first scheduling for application-level QoS delivery

    Publication Year: 1997 , Page(s): 172 - 181
    Cited by:  Papers (2)
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    The quality of service (QoS) of real time applications is affected in a rather direct manner by the timely delivery of application-level data units which are typically mapped into several ATM cells. As a consequence, it would be reasonable to associate a common deadline with all the cells in one data unit (batch) and develop a scheduling policy that aims to maximise the number of data units that are delivered by their respective deadlines. A batch-based earliest due first scheduling policy is proposed and analysed under periodic batch arrival processes which are typical of continuous media streams. Depending on whether partial batch service is performed or not, two variations of this scheduler are considered. It is shown that the proposed policies can be easily implemented in terms of a first batch in-first batch out (FBI-FBO) and a partial FBI-FBO schedulers respectively. Numerical results are presented and the induced batch and cell loss rates are compared against those induced by the standard FIFO scheduler as well as a FIFO scheduler which drops expired cells View full abstract»

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  • Using ESTEREL for building synchronization mechanisms in multimedia systems

    Publication Year: 1997 , Page(s): 269 - 272
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    This paper shows how the formal specification language ESTEREL may be efficiently used in the development of multimedia systems. We cover the specification and validation of a lip-synchronization mechanism. Modeling of this mechanism lends to a relative simple specification which confirms the simplification of reasoning about real-time systems related to the synchrony hypothesis. Several results obtained by simulation allowed a performance evaluation of the mechanism under different quality of service requirements View full abstract»

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  • Scalable resource reservation for the Internet

    Publication Year: 1997 , Page(s): 18 - 27
    Cited by:  Papers (8)  |  Patents (6)
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    Current resource reservation architectures for multimedia networks don't scale well for a large number of flows. We propose a new architecture that aggregates flows on each link in the network. Therefore, the network has no knowledge of individual flows, and resource management functions traditionally implemented in the network (such as flow acceptance control) are delegated to hosts View full abstract»

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  • Providing open platform support for multimedia applications

    Publication Year: 1997 , Page(s): 273 - 276
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    This article presents and analyses an approach used to model distributed continuous media applications in terms of an object-based description of support for continuous media and of software reuse. Support for continuous media is discussed in terms of rate control and stream handling, and it is provided at the application level, and thus, the approach satisfies requirements for open-endedness View full abstract»

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  • Multimedia-multiparty service support in ATM wide area networks

    Publication Year: 1997 , Page(s): 229 - 238
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    Multicast service support in today's networks will be crucial for the evolution of new computer supported cooperative work (CSCW) applications. In order to consolidate ATM as the future wide area network technology it is required that it provides an efficient support for this service. We describe a new proposal of a network structure based on WAN-ATM that provides an efficient workgroup communication and which has been tested in real environments. We focus on the network structure, functional switching and the resource allocation issues View full abstract»

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  • Authoring and formatting of documents based on event-driven hypermedia models

    Publication Year: 1997 , Page(s): 74 - 83
    Cited by:  Papers (1)
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    This paper presents a critical analysis of specification and presentation environments for hypermedia documents with time constraints. The solutions implemented in the HyperProp authoring and execution environment are also presented View full abstract»

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  • Enabling temporal synchronization in E-LOTOS specifications and MHEG-5 applications

    Publication Year: 1997 , Page(s): 92 - 100
    Cited by:  Patents (1)
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    Identifying temporal and logical synchronization constraints during a multimedia and hypermedia authoring process is a relevant issue. Based on a general purpose model, this paper investigates an equivalence framework to model the temporal relationships between the MHEG-5 applications and E-LOTOS specifications of these behavior patterns. This work is part of a design methodology, where the E-LOTOS/MHEG-5 libraries will enable the conception of a mapping procedure between these representations View full abstract»

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  • A protocol supporting distributed group and QoS management

    Publication Year: 1997 , Page(s): 213 - 222
    Cited by:  Papers (2)  |  Patents (2)
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    Modern multimedia applications require new services from the communication systems. To negotiate and to manage the quality of service parameters, and in the case of collaborative work, to support synchronization and concurrency control, control information between the group members has to be exchanged. There are some approaches where a central group server supports the group and QoS management. To avoid the problems of central servers such as server failures and performance bottlenecks on the server side a distributed scheme for group and QoS management is more suitable. We present a protocol that supports distributed group and QoS management. The protocol is part of a conferencing system designed for applications of computer supported cooperative work. The system is based on the asynchronous transfer mode. The group communication protocol provides reliable, atomic and totally ordered delivery for a group of communicating partners. A design goal was simplicity to limit the overhead introduced by the group communication because the transmission and processing of video streams consumes a lot of bandwidth and processing power respectively View full abstract»

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  • A new multicast ATM switching architecture proposal

    Publication Year: 1997 , Page(s): 253 - 256
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    The integration of different kinds of multimedia services including multicasting services, such as teleconferencing, entertainment videos, and file distribution, etc., requires a multicast switching system to flexibly handle these services. We propose a multicast ATM cell switching architecture for ATM networks, where the abilities of a broadcast bus are used to provide multicasting. Instead of using the concatenation of a copying network and a routing network, the same switching network is used to perform both copying and routing of multicast ATM cells. This multicast switch architecture treats unicast and multicast cells in the same way, and the mean delay for the two kinds of cells has the same characteristics for the offered load traffic in the switching system. The results of an extensive simulation and a mathematical analysis of this switch architecture are also included View full abstract»

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  • A pattern system supporting QoS for synchronous collaborative systems

    Publication Year: 1997 , Page(s): 223 - 228
    Cited by:  Papers (1)
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    Synchronous collaborative applications have varying demands of network service requirements, such as bandwidth, latency, or in general quality of service (QoS). Based on the number of active members, floor control and focus of attention, the low-level control of parameters can overwhelm the developers of systems. To address this problem we have extended a pattern system for collaborative software development, named COCHI (Collaborative Objects for Communication and Human Interaction), to handle QoS in collaborative systems when the network infrastructure that supports this feature is available. When used, these patterns negotiate changes in QoS when the state of other related objects is updated View full abstract»

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  • The role of parametrization in the multimedia authoring process

    Publication Year: 1997 , Page(s): 142 - 149
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    The development of multimedia presentations has become increasingly popular among professionals of different areas such as designers, publishers, executives, etc. A great deal of authoring systems are mostly focused on the final product: the presentation, providing many tools to help in its elaboration. This targeting causes most of the systems, to a certain extend, to leave behind the authoring process and, therefore, the author himself, with no adequate support for the design of his/her presentation, rendering the authoring task harder if not complicated at least. This problem is even more acute knowing that most users of authoring tools are professionals from areas such as the arts, film industry, education, medicine, etc., with little or no experience in programming. It is this lack of concern with authors and the authoring process that has led us to develop a new authoring paradigm totally focused on the author. Many aspects of the authoring and design process have been studied. A new phase has been identified, namely, the presentation parametrization View full abstract»

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