H. ThimmandW. Klas. Playout management - an integrated service of a multimedia database management system. In Proc. 1EEE lnt. WS on Multimedia Database Management Systems, pages 3847, Blue Mountain Lake, NY, USA, Aug. 1995.1EEE, 1EEE Computer Society Press.  Home/Search   Document Details and Download   Summary   Related Articles   Check

....algorithm with local PB RPM at the presentation sites and global PB RPM at the central database environment. We identify concrete components and describe how they must work together to achieve PB RPM. This proposal is an extention of our general concept of Playout Management in distributed MM DBS [12] that we have realized within the context of IPSI s AMOS system. The AMOS system is a research prototype of a distributed MM DBMS [12, 8, 14] The development of AMOS is driven by experiences gathered by several concrete multimedia applications, e.g. 16, 15] The remainder of this paper is ....

....and describe how they must work together to achieve PB RPM. This proposal is an extention of our general concept of Playout Management in distributed MM DBS [12] that we have realized within the context of IPSI s AMOS system. The AMOS system is a research prototype of a distributed MM DBMS [12, 8, 14]. The development of AMOS is driven by experiences gathered by several concrete multimedia applications, e.g. 16, 15] The remainder of this paper is organized as follows. Section 2 introduces PB RPM independent of a concrete type of system. Section 3 discusses the specific requirements for ....

[Article contains additional citation context not shown here]

H. ThimmandW. Klas. Playout management - an integrated service of a multimedia database management system. In Proc. 1EEE lnt. WS on Multimedia Database Management Systems, pages 3847, Blue Mountain Lake, NY, USA, Aug. 1995.1EEE, 1EEE Computer Society Press.

....be performed according to a certain speed rate. The IAM must be aware of the corresponding intramedia synchronization requirements according to the QOS. Some of the presentation control commands are addressed to currently running presentations like the stop command. For more details of the IAM see [28]. Continuous Object Manager The Continuous Object Manager (COM) frees the applications from considering time dependency of multimedia data. Continuous object management functionality can be categorized into object handling, direct access, and buffer resource management. Additionally, it has been ....

H. Thimm and W. Klas. Playout Management - An Integrated Service of a Multimedia Database Management System. to appear in First International Workshop on Multi-Media Database Management Systems, Blue Mountain Lake, NY, IEEE Computer Society Press, August 1995.

....other services provided by the database system like transaction management, storage management, and concurrency control. One of the advantages of such an architecture is it provides adequate database support for multimedia applications demanding script based interactive multimedia presentations [TK95] A client server model wherein the client performs the playout management locally is an ideal candidate for implementing the playout management service (see Figure 1) As everything is handled within the same system, efficient interplay between playout management components and other database ....

Heiko Thimm and Wolfgang Klas. Playout Management -- An Integrated Service of a Multimedia Database Management System, 1995. (Technical Report, GMD-IPSI).

....systems can be heterogeneous. The main function of each client at a workstation is to display multiple media data to the user in the specified format. Such an architecture can provide adequate database support for multimedia applications demanding script based interactive multimedia presentations [TK95]. MTL MM MTL MM MTL MM Media DB OODBMS Media DB OODBMS Client 1 Client 2 Client n Network MTL MM MTL MM MTL MM Server Server Server Media DB OODBMS Figure 1: NetMedia system architecture As shown in Figure 1, the distributed multimedia database management system contains two main modules: a ....

Heiko Thimm and Wolfgang Klas. Playout Management -- An Integrated Service of a Multimedia Database Management System, 1995. (Technical Report, GMD-IPSI).

....systems can be heterogeneous. The main function of each client at a workstation is to display multiple media data to the user in the specified format. Such an architecture can provide adequate database support for multimedia applications demanding script based interactive multimedia presentations [TK95]. MTL MM MTL MM MTL MM Media DB DBMS Media DB DBMS Client 1 Client 2 Client n Network MTL MM MTL MM MTL MM Server Server Server Media DB DBMS Figure 1: NetMedia system architecture As shown in Figure 1, the distributed multimedia database management system contains two main modules: a multimedia ....

Heiko Thimm and Wolfgang Klas. Playout Management -- An Integrated Service of a Multimedia Database Management System, 1995. (Technical Report, GMD-IPSI).

....of media streams over network. In a distributed or networked environment, approaches are also needed for the client sites to enforce synchronous presentation of multiple media streams. Research involving the synchronized presentation of multimedia data on this aspect has been started [Gha95, TK95a, TK95b] Its importance and new issues have been realized in related workshops [NWS96, SUB96] Chaudhuri et al. [CGS95] have investigated the problem of continuously displaying composite objects that are dynamically specified. Courtiat et al. [COC94] have proposed a conditional delivery mechanism ....

Heiko Thimm and Wolfgang Klas. Playout Management -- An Integrated Service of a Multimedia Database Management System, 1995. (Technical Report, GMD-IPSI).

....These mechanisms are intended to ensure that the defined continuity and synchrony of media streams will be preserved to the greatest extent possible, even if there are user interactions and loading delays. Research involving buffer management in multimedia database systems is still in its infancy [TK95]. Moser et al. [MKK95] have proposed a buffer strategy termed least most relevant for presentation. This buffer strategy investigates the effects of such user interactions as rewind and fast forward on buffer design. A mechanism is proposed which reduces the ensuing delay after user ....

Heiko Thimm and Wolfgang Klas. Playout Management -- An Integrated Service of a Multimedia Database Management System, 1995. (Technical Report, GMD-IPSI).

....other services provided by the database system like transaction management, storage management, and concurrency control. One of the advantages of such an architecture is it provides adequate database support for multimedia applications demanding script based interactive multimedia presentations [TK95] A client server model wherein the client performs the playout management locally is an ideal candidate for implementing the playout management service (see Figure 4) As everything is handled within the same system, efficient interplay between playout management components and other database ....

Heiko Thimm and Wolfgang Klas. Playout Management -- An Integrated Service of a Multimedia Database Management System, 1995. (Technical Report, GMD-IPSI).

....computers. Substantial research has been directed toward the support of multimedia data processing within operating systems and network architectures [RV93, Ste90, AH91, RRK93, GR93, ZF93] Recently, research involving multimedia data management in database systems has also been highly active [TK95, MKK95, CGS95, GZ96, ZM96] Through these research activities, new behavioral concepts required for multimedia data have been identified and mechanisms have been proposed to enhance conventional data processing, storage, synchronization, and communication mechanisms. Using these mechanisms, ....

....systems can be heterogeneous. The main function of each client at a workstation is to display multiple media data to the user in the specified format. Such an architecture can provide adequate database support for multimedia applications demanding script based interactive multimedia presentations [TK95] A client server model wherein the client performs the playout management locally is an ideal candidate for implementing the playout management service. The integration of the multimedia playout management and database systems make it possible to efficient interplay between playout management ....

Heiko Thimm and Wolfgang Klas. Playout Management -- An Integrated Service of a Multimedia Database Management System, 1995. (Technical Report, GMD-IPSI).

....that combines the storage of binary large objects with a continuous transport mechanism [26] provides generic support for the efficient handling of continuous media. Further components of the database client support the presentation of continuous and non continuous media at the user s site [33]. All aspects of complex interactive multimedia presentations like synchronisation, layout and interaction handling are managed by the database client [29] In the MUSE context these capabilities are mainly used for product documentation purposes. An example is the synchronised reproduction of a ....

....whose relationships to the existing information have to be represented. In addition, the whole spectrum of different media used in MUSE (text, audio, video, etc. has to be made available by the hypermedia environment. To accomplish this, the AMOS extensions for multimedia presentation are used [29, 25, 26, 33]. From the user s point of view the integration is quite simple: For example, if the content of a hypermedia node is a process network then selecting the menu item edit will invoke the process editor. Showing a multimedia content will similarly start a multimedia presentation. These calls are ....

H. Thimm and W. Klas. Playout Management -- An Integrated Service of a Multimedia Database Management System. In First International Workshop on Multi--Media Database Management Systems, pages 28--30. Blue Mountain Lake, NY, USA, IEEE Computer Society Press, August 1995.

....We present our solutions to these problems. Furthermore, we describe a concrete implementation of a demonstrator which is based on the two multimedia database management systems MOSS [10, 11, 15, 17, 18] developed at Dresden University of Technology and University of Erlangen Nrnberg, and AMOS [1, 19, 28, 32, 33, 34, 35], developed at GMD IPSI. The distribution and interoperability is implemented according to the Object Management Group s (OMG) Common Object Request Broker Architecture (CORBA) More precisely, we have used an Object Broker implementation developed by DEC. The remainder of this paper is ....

.... (unions, intersections, difference) can be applied to searchsets, too (the dictionary of the resulting set cannot be generated automatically from the two input sets; it must be compiled and attached to the set by the user) AMOS (Active Media Object Store) is a research prototype of a MM DBMS [1, 19, 28, 32, 33, 34, 35] under development at GMD IPSI. Most multimedia applications involve a diversity of conventional datatypes like numbers, text, and tables combined with media data like images (bitmaps) graphics, audio, video and animations. Early research results in the area of multimedia systems have shown that ....

[Article contains additional citation context not shown here]

Thimm, H., Klas, W.: "Playout Management - An Integrated Service of a Multimedia Database Management System", First International Workshop on Multi-Media Database Management Systems, Blue Mountain Lake, NY, USA, August 28-30, IEEE Computer Society Press, 1995, pp. 38-47

....e.g. playing back an audio and playing back a video stream. Execution Support for Presentation Realization The basic scenario for the execution of a presentation is as follows. The overall control of a presentation is with a playout management component integrated into the database system [3]. The playout management component consists of a controller for controlling and synchronizing individual presentation tasks. Each presentation task is performed by specific Single Media Presenters which are capable of presenting a single media type. In addition, there exist specific interaction ....

Heiko Thimm and Wolfgang Klas. Playout Management - An Integrated Service of a Multimedia Database Management System. Procceedings of the First Internatioal Workshop on Multimedia Database Management Systems, Blue Mountain Lake, NY, August 28-30, 1995. IEEE Computer Society Press, 1995.

....(1) managing the involved output devices, 2) handling the data streams, 3) enforcing the timing and synchronization constraints, and (4) handling random user interactions. For multimedia database management systems, a playout management service as a novel built in service was proposed recently [28]. This allows for the most adequate database support for multimedia applications and highly efficient realization of stored multimedia presentations. Since everything is handled within one system, efficiency of the overall handling of multimedia data by a database management system is increased. ....

....to build an adequate storage system for many multimedia applications. Since many of these multimedia applications need to provide playout management, a respective service must be included within the overall system. In the following, we briefly discuss alternative solutions for that (Figure 1) [28]. We assume for each case that the database management system supports, in addition to respective services for conventional data, a continuous data management service which makes continuous data available in a dedicated continuous data buffer [17, 20] 5 AP DBMS user interactions DBMS Pres. ....

[Article contains additional citation context not shown here]

Thimm, H., Klas, W.: "Playout Management - An Integrated Service of a Multimedia Database Management System", First International Workshop on Multi-Media Database Management Systems, Blue Mountain Lake, NY, USA, August 28-30, IEEE Computer Society Press, 1995

.... An example of a multimedia database system with an integrated playout management service for time based multimedia presentations is the AMOS system (Active Media Object Stores) AMOS is a research prototype of a distributed object oriented multimedia database management system developed at GMDIPSI [1, 33, 42, 28]. The development of the AMOS system is driven by our experiences with real multimedia applications [32, 39, 40, 41] Its implementation is based on the object oriented database management system VODAK [22, 48, 2] which has also been developed at GMD IPSI. The integrated generic playout management ....

....Thus, very efficient solutions for the data transportation are possible (criterion c 3 ) d) Playout Management as Database Management System Integrated Service Description. In this architecture, playout management functionality is provided as integrated service of the database management system [42, 43, 44]. The latter interprets the presentation specification by mapping it into corresponding playout management actions (e.g. synchronization enforcement actions) These actions are carried out by the database management system. Furthermore, with a higher priority, the database management system ....

Thimm, H., Klas, W.: "Playout Management - An Integrated Service of a Multimedia Database Management System", Int. WS on Multimedia REFERENCES 61 Database Management Systems, Blue Mountain Lake, NY, August 1995, IEEE Computer Society Press, pp. 38--47

....algorithm with local PB RPM at the presentation sites and global PB RPM at the central database environment. We identify concrete components and describe how they must work together to achieve PB RPM. This proposal is an extention of our general concept of Playout Management in distributed MM DBS [12] that we have realized within the context of IPSI s AMOS system. The AMOS system is a research prototype of a distributed MM DBMS [12, 8, 14] The development of AMOS is driven by experiences gathered by several concrete multimedia applications, e.g. 16, 15] The remainder of this paper is ....

....and describe how they must work together to achieve PB RPM. This proposal is an extention of our general concept of Playout Management in distributed MM DBS [12] that we have realized within the context of IPSI s AMOS system. The AMOS system is a research prototype of a distributed MM DBMS [12, 8, 14]. The development of AMOS is driven by experiences gathered by several concrete multimedia applications, e.g. 16, 15] The remainder of this paper is organized as follows. Section 2 introduces PB RPM independent of a concrete type of system. Section 3 discusses the specific requirements for ....

[Article contains additional citation context not shown here]

H. Thimm and W. Klas. Playout management - an integrated service of a multimedia database management system. In Proc. IEEE Int. WS on Multimedia Database Management Systems, pages 38--47, Blue Mountain Lake, NY, USA, Aug. 1995. IEEE, IEEE Computer Society Press.

....algorithm with local PB RPM at the presentation sites and global PB RPM at the central database environment. We identify concrete components and describe how they must work together to achieve PB RPM. This proposal is an extention of our general concept of Playout Management in distributed MM DBS [29] that we have realized within the context of IPSI s AMOS system. The AMOS system is a research prototype of a distributed MM DBMS [20, 16, 25, 1, 17] The development of AMOS is driven by experiences gathered by the realization of several concrete multimedia applications [26, 27, 28, 33] The ....

....n next presentation seconds relative to the current presentation time. The current presentation quality that the prefetch process supports is denoted by Q b . The current buffer level is denoted by B. ffl An asynchronously running playout process which handles the playout of the multimedia data [29] such that the executing multimedia presentation provides a current playout presentation quality denoted by Q p . In essence, this process manages the output devices according to Q p and user interactions. ffl A third process called PB RPM enforcement process which: keeps track of the current ....

[Article contains additional citation context not shown here]

Thimm, H., Klas, W.: "Playout Management - An Integrated Service of a Multimedia Database Management System", Proc. IEEE Int. WS on Multimedia Database Management Systems, Blue Mountain Lake, NY, August 1995, IEEE Computer Society Press, pp. 38--47

....We present our solutions to these problems. Furthermore, we describe a concrete implementation of a demonstrator which is based on the two multimedia database management systems MOSS [10, 11, 15, 17, 18] developed at Dresden University of Technology and University of Erlangen N rnberg, and AMOS [1, 19, 28, 32, 33, 4 34, 35], developed at GMD IPSI. The distribution and interoperability is implemented according to the Object Management Group s (OMG) Common Object Request Broker Architecture (CORBA) More precisely, we have used an Object Broker implementation developed by DEC. The remainder of this paper is organized ....

.... (unions, intersections, difference) can be applied to searchsets, too (the dictionary of the resulting set cannot be generated automatically from the two input sets; it must be compiled and attached to the set by the user) AMOS (Active Media Object Store) is a research prototype of a MM DBMS [1, 19, 28, 32, 33, 34, 35] under development at GMD IPSI. Most multimedia applications involve a diversity of conventional datatypes like numbers, text, and tables combined with media data like images (bitmaps) graphics, audio, video and animations. Early research results in the area of multimedia systems have shown that ....

[Article contains additional citation context not shown here]

Thimm, H., Klas, W.: "Playout Management - An Integrated Service of a Multimedia Database Management System", First International Workshop on Multi-Media Database Management Systems, Blue Mountain Lake, NY, USA, August 1995, IEEE Computer Society Press, 1995, pp. 38-47

....Manager. Additionally, the management of specific multimedia devices (e.g. audio boards or decompressing chips) and presentation devices, so called Single Media Presenters, is performed by the Playout Manager. A detailed description of an approach to a multimedia playout management is given in [TK95a, TK95b] 4.4.2 Continuous Data Management The Continuous Object Manager frees the applications from considering time dependency during media capture and presentation. Continuous object management functionality is categorized into object handling, direct access, and buffer resource management. ....

H. Thimm and W. Klas. Playout Management --- An Integrated Service of a Multimedia Database Management Systems. In Proceedings of the First International Workshop on MultiMedia Database Management Systems, Blue Mountain Lake, NY, August 28-30, 1995. IEEE Computer Society Press, 1995.

....are employed to describe the mappings of external schemas to ex Sec. 1.2. Database Integration Environment 11 port schemas specified in VML [KFA94] Specific requirements and solutions for integrating multimedia data in VODAK are described in [AK93, KNS90b, RLMN93, TR93a, TR93b, AK94, TK95a, TK95b, RNL95, MKK95] The same techniques are employed to adapt VODAK for the integration of heterogeneous database systems. In this section we present the main concepts of VML as far as we need them for the discussion of the database integration issues. We show how the model is tailored so that ....

H. Thimm and W. Klas. Playout Management---An Integrated Service of a Multimedia Database Management Systems. To appear in Proceedings of the First International Workshop on Multi-Media Database Management Systems, Blue Mountain Lake, NY, August 28-30, 1995. IEEE Computer Society Press, 1995.

....stream handling, the enforcement of the synchronization constraints, and the handling of user interactions. The general goal is to achieve that storage, retrieval, buffer management, data transmission, as well as playout management are handled in an integrated way by the database management system [32, 29]. In the following we address architectural issues and the problems which arise with the integration of playout management into a multimedia database system in more detail. System Architecture As a consequence of the requirements to a multimedia system architecture we see the necessity of a ....

H. Thimm and W. Klas. Playout Management -- An Integrated Service of a Multimedia Database Management System. In FirstInternational Workshop on Multi--Media Database Management Systems, pages 28--30. Blue Mountain Lake, NY, USA, IEEE Computer Society Press, August 1995.

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Thimm, H., Klas, W., "Playout Management - An Integrated Service of a Multimedia Database Management System," International Workshop on Multi-Media Database Management Systems (MMDBMS '95), Blue Mountain Lake, N.Y., 1995.

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