Delivering Hypermedia Sessions from A Continuous Media Server

Gopal, Chetan; Buford, John F.

doi:10.1007/978-1-4613-1431-8_9

Cited by 8 publications

(6 citation statements)

References 9 publications

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“…Once ∆ (a+1,b) is available, ∆λ in equation (11) can also be computed in a similar fashion to equations (12) and (13). The complication in this case comes from the computation of ∆ or .…”

Section: Ep Op Invmentioning

confidence: 97%

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JINSIL: A middleware for presentation of composite multimedia objects in a distributed environment

Song

Dan

Sitaram³

2002

Multimedia Systems

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In a distributed environment, the presentation of structured, composite multimedia information poses new challenges in dealing with variable bandwidth (BW) requirements and synchronization of media data objects. The detailed knowledge of BW requirements obtained by analyzing document structure can be used for efficient utilization of system resources. A distributed multimedia environment consists of various system components that are either dedicated to a client (e.g., client buffer space and BW) or shared across multiple clients (e.g., server buffer space and BW). A shared server could benefit from fine granularity advanced reservation of resources based on true BW requirements. Prefetching by utilizing advance knowledge of BW requirements can further improve resource utilization. The prefetch schedule needs also to be aware of the BW fragmentation in a partitioned server. In this paper, we describe the JIN-SIL middleware for retrieval of a composite document that takes into account the available BW and buffer resources and the nature of sharing in each component on delivery paths. It reshapes BW requirements, creates prefetch schedules for efficient resource utilization, and reserves necessary BW and buffer space. We also consider good choices for placement of prefetch buffers across client and server nodes.

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Section: Ep Op Invmentioning

confidence: 97%

“…In [4], the authors study prefetching and delaying schemes to avoid contention in data retrieval from disk space. A characterization and workload of hypermedia applications is proposed in [13]. The workload is used to study (via simulation) the performance of the Continuous Media File System (CMFS).…”

Section: Contributions and Relationship To Earlier Workmentioning

confidence: 99%

JINSIL: A middleware for presentation of composite multimedia objects in a distributed environment

Song

Dan

Sitaram³

2002

Multimedia Systems

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“…Server caching for VCR-interactions ( [30], [3]) needs applications with high probabilities for the access of same media data, such as news on demand. Re-admission at media switches is proposed in [12] by adressing interactive hypermedia sessions consisting of discrete and continuous data requests. This works well for low workload (e.g., 50 percent), but startup latency gets intolerable for higher workload.…”

Section: Related Workmentioning

confidence: 99%

“…High startup latency in between subsequent presentations are thus not tolerable [12], New address: Mummert und Partner Consulting AG, Kölner Strasse 44, 60327 Frankfurt, Germany Permission to make digital or hard copies of all or part of this work for personal or classroom use is granted without fee provided that copies are not made or distributed for profit or commercial advantage and that copies bear this notice and the full citation on the first page. To copy otherwise, to republish, to post on servers or to redistribute to lists, requires prior specific permission and/or a fee.…”

Section: Introductionmentioning

confidence: 99%

Stochastic resource prediction and admission for interactive sessions on multimedia servers

Friedrich¹,

Hollfelder²,

Aberer³

2000

Proceedings of the Eighth ACM International Conference on Multimedia

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In highly interactive multimedia applications startup latency is significant, and may negatively impact performance and Quality of Service (QoS). To avoid this, our approach is to admit whole multimedia sessions instead of single media streams. For the prediction of the varying resource demands within a session, which are mainly correlated to user behavior, we model user behavior as Continuous Time Markov Chains (CTMCs). In this paper, we propose a mathematical analysis of the CTMC model. This allows to anticipate possible overload and in turn to plan an admission control policy. As a result, our approach provides better control on the tradeoff between server utilization and QoS. Simulation studies confirm this capability.

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“…In particular, upcoming multimedia formats such as HyTime [5] and MHEG [6] combines related CM and DM information in temporal and hyperlinked compositions. Hypermedia (HM), a superset of CM, are hypergraph-structured programmes that consist of video branches, as well as loosely time-tied DM data, separated by user-interaction nodes [7], [8]. As a multimedia user navigates, the data requested may switch frequently between DM and CM.…”

Section: Introductionmentioning

confidence: 99%

Run-time optimization of heterogeneous media access in a multimedia server

Hamidzadeh

2000

IEEE Trans. Multimedia

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Discrete media (DM) data throughput is vital to systems that need to support the heterogeneity and variety of data found in interactive hypermedia and digital library applications. Therefore, a multimedia server's ability in delivering a high DM data throughput without degrading its CM data throughput deserves more attention. In this paper, we address this issue by optimizing the use of disk bandwidth spent on CM service at run-time and redirecting the saved bandwidth to service DM requests. Based on a new cost model of disk access incurred in CM service, we formulate strategies to control the size of each disk read at run time. These strategies improve the efficiency of each disk access and improve the DM data throughput of a multimedia server, without jeopardizing the CM throughput. Through experimental evaluations, the improvements achieved are demonstrated. Furthermore, efficient control of the allocation of disk bandwidth between DM and CM services over a wide range is also demonstrated.

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Delivering Hypermedia Sessions from A Continuous Media Server

Cited by 8 publications

References 9 publications

JINSIL: A middleware for presentation of composite multimedia objects in a distributed environment

JINSIL: A middleware for presentation of composite multimedia objects in a distributed environment

Stochastic resource prediction and admission for interactive sessions on multimedia servers

Run-time optimization of heterogeneous media access in a multimedia server

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