Recent advances in wireless mobile computing, digital library, and distributed multimedia technologies are stimulating the development of mobile multimedia digital library systems （ M2DLS） that allow mobile clients ...Recent advances in wireless mobile computing, digital library, and distributed multimedia technologies are stimulating the development of mobile multimedia digital library systems （ M2DLS） that allow mobile clients to access multimedia material anywhere and anytime over a cellular radio network. This paper addresses the problem of providing synchronized multimedia retrieval in these sys- tems. An efficient inter-media synchronization scheme called wireless prioritized feedback （WPF） for mobile multimedia on-demand retrieval in digital library systems over CDMA cellular radio networks in the absence of synchronized clocks is presented. In the WPF scheme, base stations use preferential lightweight message called feedback units transmitted by mobile mediaphones to detect and correct asynchronies. The algorithm is described with pseudo code, and experiments are described to demonstrate the efficiency of WPF.展开更多
The multimedia synchronization is used to coordinate the timing of each multimedia object in the multimedia system. After studying different multimedia synchronization systems that have been published, an Interactive ...The multimedia synchronization is used to coordinate the timing of each multimedia object in the multimedia system. After studying different multimedia synchronization systems that have been published, an Interactive Synchronization multimedia based on Petri Nets model （ISPN） is proposed in this paper. The system is capable of describing the dynamic timing actions of multimedia objects vividly as well as controlling them interactively to maintain the system level synchronization balance.展开更多
Multimedia synchronization has been recognized by many researchers as a significant requirement for multimedia applications. Modeling and specifying timing requirements of the multimedia synchronization is a main prob...Multimedia synchronization has been recognized by many researchers as a significant requirement for multimedia applications. Modeling and specifying timing requirements of the multimedia synchronization is a main problem of multimedia synchronization. In this paper, on the basis of overcoming the limitations of the other models, a new multimedia dynamic synchronization Petri net (DSPN), has been proposed. This model can let the multimedia system keep the multimedia synchronization in a more precise and effective manner.展开更多
This paper provides a survey of selection of most common existing temporal models for multimedia synchronization, which are based on CSP, CCS, path expressions, and Petri net. Multimedia refers to the integrated gener...This paper provides a survey of selection of most common existing temporal models for multimedia synchronization, which are based on CSP, CCS, path expressions, and Petri net. Multimedia refers to the integrated generation, representation, processing, storage, and dissemination of information expressed in multiple time dependent and time independent media such as data, text, graphics, images, audio, and video. Synchronization assures a temporal order of events, which is a well-studied topic in the area of operating systems, parallel programming languages, and database technology.展开更多
Multimedia synchronization is the key technology in application of distributed multimedia.Solution of synchronization conflicts insides and among streams as well as that of user interaction,synchronization granularity...Multimedia synchronization is the key technology in application of distributed multimedia.Solution of synchronization conflicts insides and among streams as well as that of user interaction,synchronization granularity refinement and synchronization precision improvement remain great challenges although great efforts have been invested by the academic circle.The construction method of a dual-scale dynamic synchronous model of multimedia presented in this article realizes multimedia synchronization on two sca...展开更多
Multimedia synchronization is the essential technology for the integration of multimedia in distributed multimedia systems. The multimedia synchronization model has been recognized by many researchers as a premise of ...Multimedia synchronization is the essential technology for the integration of multimedia in distributed multimedia systems. The multimedia synchronization model has been recognized by many researchers as a premise of the implementation of multimedia synchronization. In distributed multimedia systems, the characteristic of multimedia synchronization is dynamic, and the key medium has the priority in multimedia synchronization. The previously proposed multimedia synchronization models cannot meet these requirements. So a new multimedia dynamic synchronization model-DSPN,based on the timed4etri-net has been designed in this paper. This model can not only let the distributed multimedia system keep multimedia synchronization in a more precise and effective manner according to the runtime situation of the system, but also allow the. user to interact with the presentation of multimedia.展开更多
From the viewpoint of Cybernetics, multimedia playout synchronization system is a closed loop control system. The paper analyses the stability of a typical buffer-oriented playout synchronization model~ [1] with Rout...From the viewpoint of Cybernetics, multimedia playout synchronization system is a closed loop control system. The paper analyses the stability of a typical buffer-oriented playout synchronization model~ [1] with Routh criterion. The sufficient and necessary condition of system stability is obtained. The restriction relationship between two important system parameters: synchronization adaptation phase L and smoothing factor а is also given.展开更多
Multimedia synchronization is a significant requirement for distributed multimedia applications. In this paper, a multimedia synchronization model based on timed Petri nets is presented. Using this model one can give ...Multimedia synchronization is a significant requirement for distributed multimedia applications. In this paper, a multimedia synchronization model based on timed Petri nets is presented. Using this model one can give the abstraction and formal description for multimedia object compositions with time-constrained relations. Algorithms for asynchronous user interactions are also presented.展开更多
A fine grained distributed multimedia synchronization model——Enhanced Fuzzy timing Petri Net was proposed which is good at modeling indeterminacy and fuzzy. To satisfy the need of maximum tolerable jitter, the suffi...A fine grained distributed multimedia synchronization model——Enhanced Fuzzy timing Petri Net was proposed which is good at modeling indeterminacy and fuzzy. To satisfy the need of maximum tolerable jitter, the sufficient conditions are given in intra object synchronization. Method to find a proper granularity in inter object synchronization is also given to satisfy skew. Exceptions are detected and corrected as early as possible using restricted blocking method.展开更多
Synchronization is a important issue in multimedia systems which integrate a variety oftemporally related media objects.One part of synchronization is the representation of tempo-ral information.With the emerging inte...Synchronization is a important issue in multimedia systems which integrate a variety oftemporally related media objects.One part of synchronization is the representation of tempo-ral information.With the emerging interaetive multimedia,deterministic temporal modelsare replaced by nondeterministic ones with more expressiveness.This paper classifies tempo-ral models by their expressiveness,and evaluates the relevant nondetermi.nistic temporal re-lations in multimedia data.Additionally,an interval-based nondeterministie model based ona complete temporal operator set is proposed,providing high-level abstractions and a highdegree of expressiveness for interactive multimedia systems.展开更多
A flexible and extendible control mechanism for invoking services is required for taking full advantage of the potential B--ISDN services. In this paper, a flexible specification of signaling protocol based on an obje...A flexible and extendible control mechanism for invoking services is required for taking full advantage of the potential B--ISDN services. In this paper, a flexible specification of signaling protocol based on an object-oriented call mode is proposed. The article’focuses on the protocol’s message syntax, message flow model, and applicability for defining multimedia and multiparty services.’展开更多
This paper proposes a new approach to modeling multimedia data. The new approach is the multimedia data model bued on temporal logic and XYZ System. lt supports the formal specifications in a multimedia system. Using ...This paper proposes a new approach to modeling multimedia data. The new approach is the multimedia data model bued on temporal logic and XYZ System. lt supports the formal specifications in a multimedia system. Using this model, we can not only speci. information units but also design and script a multi. media title ia an unified framework. Based on this model, an interactive multimedia authoring environment has beea developed .展开更多
Synchronization is an important issue in multimedia systems which integrate a variety of temporally related media objects. One part of synchronization is the representation of temporal information. With the emerging ...Synchronization is an important issue in multimedia systems which integrate a variety of temporally related media objects. One part of synchronization is the representation of temporal information. With the emerging illteractive multimedia, deterministic temporal models are replaced by nondeterministic ones with more expressiveness. This paper classifies temporal models by their expressiveness, and evaluates relevant nondeterministic temporal relations in multimedia data. Additionally, an intervalbased nondeterndnistic model based on a complete temporal operator set is proposed providing highlevel abstractions and a high degree of expressiveness for interactive multimedia systems.展开更多
基金Project supported by National Natural Science Foundation of China (Grant No .60221120146) , National Basic Research Pro-gram of China ( Grant No . 973 -G1999032704) , and National Grand Fundamental Post Doctor Research of China (Grant No .2003034146)
文摘Recent advances in wireless mobile computing, digital library, and distributed multimedia technologies are stimulating the development of mobile multimedia digital library systems （ M2DLS） that allow mobile clients to access multimedia material anywhere and anytime over a cellular radio network. This paper addresses the problem of providing synchronized multimedia retrieval in these sys- tems. An efficient inter-media synchronization scheme called wireless prioritized feedback （WPF） for mobile multimedia on-demand retrieval in digital library systems over CDMA cellular radio networks in the absence of synchronized clocks is presented. In the WPF scheme, base stations use preferential lightweight message called feedback units transmitted by mobile mediaphones to detect and correct asynchronies. The algorithm is described with pseudo code, and experiments are described to demonstrate the efficiency of WPF.
基金Supported by the National Natural Science Foundation of China (60572100)
文摘The multimedia synchronization is used to coordinate the timing of each multimedia object in the multimedia system. After studying different multimedia synchronization systems that have been published, an Interactive Synchronization multimedia based on Petri Nets model （ISPN） is proposed in this paper. The system is capable of describing the dynamic timing actions of multimedia objects vividly as well as controlling them interactively to maintain the system level synchronization balance.
文摘Multimedia synchronization has been recognized by many researchers as a significant requirement for multimedia applications. Modeling and specifying timing requirements of the multimedia synchronization is a main problem of multimedia synchronization. In this paper, on the basis of overcoming the limitations of the other models, a new multimedia dynamic synchronization Petri net (DSPN), has been proposed. This model can let the multimedia system keep the multimedia synchronization in a more precise and effective manner.
文摘This paper provides a survey of selection of most common existing temporal models for multimedia synchronization, which are based on CSP, CCS, path expressions, and Petri net. Multimedia refers to the integrated generation, representation, processing, storage, and dissemination of information expressed in multiple time dependent and time independent media such as data, text, graphics, images, audio, and video. Synchronization assures a temporal order of events, which is a well-studied topic in the area of operating systems, parallel programming languages, and database technology.
文摘Multimedia synchronization is the key technology in application of distributed multimedia.Solution of synchronization conflicts insides and among streams as well as that of user interaction,synchronization granularity refinement and synchronization precision improvement remain great challenges although great efforts have been invested by the academic circle.The construction method of a dual-scale dynamic synchronous model of multimedia presented in this article realizes multimedia synchronization on two sca...
文摘Multimedia synchronization is the essential technology for the integration of multimedia in distributed multimedia systems. The multimedia synchronization model has been recognized by many researchers as a premise of the implementation of multimedia synchronization. In distributed multimedia systems, the characteristic of multimedia synchronization is dynamic, and the key medium has the priority in multimedia synchronization. The previously proposed multimedia synchronization models cannot meet these requirements. So a new multimedia dynamic synchronization model-DSPN,based on the timed4etri-net has been designed in this paper. This model can not only let the distributed multimedia system keep multimedia synchronization in a more precise and effective manner according to the runtime situation of the system, but also allow the. user to interact with the presentation of multimedia.
文摘From the viewpoint of Cybernetics, multimedia playout synchronization system is a closed loop control system. The paper analyses the stability of a typical buffer-oriented playout synchronization model~ [1] with Routh criterion. The sufficient and necessary condition of system stability is obtained. The restriction relationship between two important system parameters: synchronization adaptation phase L and smoothing factor а is also given.
文摘Multimedia synchronization is a significant requirement for distributed multimedia applications. In this paper, a multimedia synchronization model based on timed Petri nets is presented. Using this model one can give the abstraction and formal description for multimedia object compositions with time-constrained relations. Algorithms for asynchronous user interactions are also presented.
文摘A fine grained distributed multimedia synchronization model——Enhanced Fuzzy timing Petri Net was proposed which is good at modeling indeterminacy and fuzzy. To satisfy the need of maximum tolerable jitter, the sufficient conditions are given in intra object synchronization. Method to find a proper granularity in inter object synchronization is also given to satisfy skew. Exceptions are detected and corrected as early as possible using restricted blocking method.
文摘Synchronization is a important issue in multimedia systems which integrate a variety oftemporally related media objects.One part of synchronization is the representation of tempo-ral information.With the emerging interaetive multimedia,deterministic temporal modelsare replaced by nondeterministic ones with more expressiveness.This paper classifies tempo-ral models by their expressiveness,and evaluates the relevant nondetermi.nistic temporal re-lations in multimedia data.Additionally,an interval-based nondeterministie model based ona complete temporal operator set is proposed,providing high-level abstractions and a highdegree of expressiveness for interactive multimedia systems.
文摘A flexible and extendible control mechanism for invoking services is required for taking full advantage of the potential B--ISDN services. In this paper, a flexible specification of signaling protocol based on an object-oriented call mode is proposed. The article’focuses on the protocol’s message syntax, message flow model, and applicability for defining multimedia and multiparty services.’
文摘This paper proposes a new approach to modeling multimedia data. The new approach is the multimedia data model bued on temporal logic and XYZ System. lt supports the formal specifications in a multimedia system. Using this model, we can not only speci. information units but also design and script a multi. media title ia an unified framework. Based on this model, an interactive multimedia authoring environment has beea developed .
文摘Synchronization is an important issue in multimedia systems which integrate a variety of temporally related media objects. One part of synchronization is the representation of temporal information. With the emerging illteractive multimedia, deterministic temporal models are replaced by nondeterministic ones with more expressiveness. This paper classifies temporal models by their expressiveness, and evaluates relevant nondeterministic temporal relations in multimedia data. Additionally, an intervalbased nondeterndnistic model based on a complete temporal operator set is proposed providing highlevel abstractions and a high degree of expressiveness for interactive multimedia systems.
