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Meeting CPU constraints by delaying playout of multimedia tasks

Balaji Raman, Samarjit Chakraborty, Wei Tsang Ooi
2005 Proceedings of the international workshop on Network and operating systems support for digital audio and video - NOSSDAV '05  
It is based on the observation that by increasing the playout delay of a multimedia task, the minimum processor frequency required to run the task decreases.  ...  Given a set of concurrently executing multimedia tasks, using our framework it is possible to compute the playout delays for each of these tasks, such that the sum of their corresponding processor cycle  ...  With a smaller delay (e.g. 0.1 seconds), it would not be possible to meet the real-time playout constraints associated with these tasks using a 750 MHz processor.  ... 
doi:10.1145/1065983.1066021 dblp:conf/nossdav/RamanCO05 fatcat:c3rqfbmqxfccfh6zj65v4mpjei

Real-time scheduling for multimedia services

Thomas D. Little, John F. Gibbon, Kadiresan Annamalai
1993 High-Speed Fiber Networks and Channels II  
A real-time scheduling system designed for multimedia data types is also required to orchestrate communications channels, disk storage units, output devices, and the CPU.  ...  Furthermore, we relate scheduling and quality of service in a summary of the objectives of multimedia service provision and negotiation.  ...  The job of a real-time scheduler is to manage the assignment of execution resources to tasks awaiting execution within the timing constraints assigned to each task.  ... 
doi:10.1117/12.141086 fatcat:k3o7sxkptzgangkfimvb6wqsii

Scheduling of bandwidth-constrained multimedia traffic [chapter]

T. D. C. Little, A. Ghafoor
1992 Lecture Notes in Computer Science  
Data of these types may not arrive in time to meet the intended playout schedule when the capacity of the channel is exceeded.  ...  Multimedia applications describe unique requirements that must be met by computer network and operating system components.  ...  This task is necessary for real-time scheduling of object retrieval in the presence of non-negligible delays [25] .  ... 
doi:10.1007/3-540-55639-7_11 fatcat:5ycvn7hdmzhwtdzbip2fltnvgq

Scheduling of bandwidth-constrained multimedia traffic

TDC Little, A Ghafoor
1992 Computer Communications  
Data of these types may not arrive in time to meet the intended playout schedule when the capacity of the channel is exceeded.  ...  Multimedia applications describe unique requirements that must be met by computer network and operating system components.  ...  This task is necessary for real-time scheduling of object retrieval in the presence of non-negligible delays [25] .  ... 
doi:10.1016/0140-3664(92)90013-5 fatcat:3d344arppramdpc44zhhxewj2u

Application-specific workload shaping in multimedia-enabled personal mobile devices

Balaji Raman, Samarjit Chakraborty
2006 Proceedings of the 4th international conference on Hardware/software codesign and system synthesis - CODES+ISSS '06  
In this paper we show that by using application-specific dynamic buffering techniques, the workload of these applications can be suitably "shaped" to fit the available processor bandwidth.  ...  Today, most personal mobile devices (e.g. cell phones and PDAs) are multimedia-enabled and support a variety of concurrently running applications such as audio/video players, word processors and web browsers  ...  Next, we formulate the second constraint, i.e. the periodic task should meet its deadline. Let the execution requirement, period and deadline of this task be e, p and d, with p ≥ d.  ... 
doi:10.1145/1176254.1176259 dblp:conf/codes/RamanC06 fatcat:huj7px36efeajbxkxz4vglwsai

Application-specific workload shaping in multimedia-enabled personal mobile devices

Balaji Raman, Samarjit Chakraborty
2008 ACM Transactions on Embedded Computing Systems  
In this paper we show that by using application-specific dynamic buffering techniques, the workload of these applications can be suitably "shaped" to fit the available processor bandwidth.  ...  Today, most personal mobile devices (e.g. cell phones and PDAs) are multimedia-enabled and support a variety of concurrently running applications such as audio/video players, word processors and web browsers  ...  Next, we formulate the second constraint, i.e. the periodic task should meet its deadline. Let the execution requirement, period and deadline of this task be e, p and d, with p ≥ d.  ... 
doi:10.1145/1331331.1331334 fatcat:i446mllpwvajvdxvzlrdgbjytq

A framework for synchronous delivery of time-dependent multimedia data

T. D. C. Little
1993 Multimedia Systems  
In this paper we describe the components of our framework for supporting time-dependent multimedia data encompassing these areas, and how they are assembled into a unified system.  ...  Timing management encompasses specification, data representation, temporal access control, playout scheduling, and run-time intermedia synchronization.  ...  The job of the real-time scheduler is to manage the assignment resources to tasks awaiting execution within the timing constraints assigned to each task.  ... 
doi:10.1007/bf01213487 fatcat:ijlbuha5b5eivbx4gculdh24ge

Dynamic Scheduling of Multimedia Documents in a Single Server Multiple Clients Environment

Ishfaq Ahmad, William Y.M. Lai, Bo Li
1999 Journal of Parallel and Distributed Computing  
This requires the server to determine the transmission schedule of each multimedia stream while ensuring necessary inter-and intrastream synchronizations.  ...  In a typical single server and multiple client distributed multimedia system, clients may send sporadic requests to the server for certain multimedia documents.  ...  In addition, the presentation system can also suffer from many constraints such as the low speed of the CPU, IÂO transfer rates, and limited buffer sizes.  ... 
doi:10.1006/jpdc.1998.1521 fatcat:z2xzz22qobcpxa7okiz6hg5h64

QoS and resource management in distributed interactive multimedia environments

Klara Nahrstedt, Ahsan Arefin, Raoul Rivas, Pooja Agarwal, Zixia Huang, Wanmin Wu, Zhenyu Yang
2010 Multimedia tools and applications  
We consider QoS and resource management influenced by two most important resources; the computing (CPU) and networking resources.  ...  Quality of Service (QoS) is becoming an integral part of current ubiquitous Distributed Interactive Multimedia Environments (DIMEs) because of their high resource and real-time interactivity demands.  ...  Moreover, the delay of any task that meets its deadline is bound to the period P t specified by the application.  ... 
doi:10.1007/s11042-010-0627-7 fatcat:bxffenweb5e7dklijfxjelr6ji

Operating system support for multimedia systems

T. Plagemann, V. Goebel, P. Halvorsen, O. Anshus
2000 Computer Communications  
In this article, we present a survey of new developments in OS support for (distributed) multimedia systems, which include: (1) development of new CPU and disk scheduling mechanisms that combine real-time  ...  An integration layer may provide transparent access to the data handled by the different subfile systems.  ...  ACKNOWLEDGEMENTS We would like to thank Frank Eliassen, Liviu Iftode, Martin Karsten, Ketil Lund, Chuanbao Wang, and Lars Wolf for reviewing earlier versions of this paper and their valuable comments and  ... 
doi:10.1016/s0140-3664(99)00180-2 fatcat:wmr4vqndazezjlocfa5kvtggxe

A quality of service architecture

Andrew Campbell, Geoff Coulson, David Hutchison
1994 Computer communication review  
This in itself is a point of major concern. The research reported in this thesis has been influenced by the debates within the ATM Forum, IETF and ISO communities on QoS research.  ...  will help harmonise the activities of these various communities.  ...  A multimedia service is potentially composed of multiple flows which, in addition to QoS support, may require orchestration to meet multimedia synchronisation constraints and QoS scaling to meet multicast  ... 
doi:10.1145/185595.185648 fatcat:zv65rl55ojecvjinjd4w4ggeca

Storage system support for continuous media applications. 2. Multiple disks, memory, and integration

P. Halvorsen, C. Griwodz, V. Goebel, K. Lund, T. Plagemann, J. Walpole
2004 IEEE Distributed Systems Online  
To meet multimedia servers' increasing performance and scalability requirements, researchers must design multimedia storage system components that adapt to various workloads and requirements.  ...  His research interests include multimedia middleware, protocol architectures, quality of service, operating system support for distributed multimedia systems, content distribution infrastructures, and  ...  Thomas Plagemann is a professor in the University of Oslo's Department of Informatics.  ... 
doi:10.1109/mdso.2004.1270781 fatcat:slqvarafvvdfjk6wby7qyej4sq

System synthesis of synchronous multimedia applications

Gang Qu, Miodrag Potkonjak
2003 ACM Transactions on Embedded Computing Systems  
Modern system design is being increasingly driven by applications such as multimedia and wireless sensing and communications, which all have intrinsic quality of service (QoS) requirements, such as throughput  ...  In particular, we address how to design system-on-chip with minimal silicon area to meet timing constraints. We propose the two-phase design methodology.  ...  We show that better synchronization can be achieved at the cost of more storage.  ... 
doi:10.1145/605459.605463 fatcat:f26l6nfzevcl3li73fjtnndysi

A survey of QoS architectures

Cristina Aurrecoechea, Andrew T. Campbell, Linda Hauw
1998 Multimedia Systems  
Over the past several years there has been a considerable amount of research within the field of quality-ofservice (QoS) support for distributed multimedia systems.  ...  Much less progress has been made in addressing the issue of overall end-to-end support for multimedia communications.  ...  A traffic class is characterized by its statistical properties and QoS requirements. Typically, QoS requirements reflect cell loss and delay constraints.  ... 
doi:10.1007/s005300050083 fatcat:gpqoymqwvnfxvh5uwx37aok4gy

Inter-destination multimedia synchronization: schemes, use cases and standardization

Mario Montagud, Fernando Boronat, Hans Stokking, Ray van Brandenburg
2012 Multimedia Systems  
of the playout processes between several distributed receivers, known as multipoint, group or Inter-Destination Multimedia Synchronization (IDMS), becomes essential.  ...  In most of these multimedia services and applications, apart from the wellknown intra and inter-stream synchronization techniques that are important inside the consumers' playout devices, also the synchronization  ...  -End-System Jitter: Delay variations in presentation at the receiver because of varying (workstation) CPU load and protocol processing delays.  ... 
doi:10.1007/s00530-012-0278-9 fatcat:k4lzw74zvbgnnndg4sm3ftigq4
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