Wirag, S. "Modeling of Adaptable Multimedia Documents". Interactive Distributed Multimedia Systems and Telecommunication Services; 4th International Workshop, IDMS'97, Darmstadt, Germany, September 1997.  Home/Search   Document Details and Download   Summary   Related Articles   Check

....and authoring system were developed. During conception of the authoring system, different concepts (e.g. templates or application specific views) have been realized to introduce further abstractions. 1. Introduction Although different multimedia document standards [1, 5] research approaches [3, 2, 6] and commercial products [14] have been proposed, the specification of multimedia documents, multimedia authoring is still a very complex task. An investigation of existing approaches showed that so far multimedia authoring concentrates mainly on the support of the temporal and spatial layout of ....

....Additionally, there is a big effort if each presentation and authoring system has to be developed from scratch. Examples for such an approach are Macromedia Authorware or Question Mark Designer. Also all approaches which provide a fixed language belong to this category (e.g. SMIL 2. 0 [1] TIEMPO [3] or Madeus [2] Their use is limited to the application area defined by their language concepts. For example it is impossible to specify a multiple choice question in SMIL 2.0 that gives the user a certain amount of time and the user can alter his answer within that time period. The reason is ....

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Wirag, S. "Modeling of Adaptable Multimedia Documents". Interactive Distributed Multimedia Systems and Telecommunication Services; 4th International Workshop, IDMS'97, Darmstadt, Germany, September 1997.

....terminals with different resources. Spatial and temporal synchronizations must be preserved to guarantee the right delivery of the semantic content of the document. This is currently one of the main problems of multimedia providers. Using constraints could be a good help to answer this problem [24], since document specification does not define one presentation but a set of presentations which can be not equivalent if we take the required resources into account. Dynamic evaluation of the presentation to play would be a solution to handle in a better way the quality of the document ....

WIRAG S., Modeling of Adaptable Multimedia Documents, Proceedings of European Workshop on Interactive Distributed Multimedia Systems and Telecommunication Services (IDMS'97), Darmstadt, September 1997. 16

.... SYSTEM MEDIATOR PRESENTATION CONTEXT MANAGER MANAGER SYNCHRONISATION OBJECTS MADEUS OBJECT MODEL VIEW PRESENTATION SCENARIO VIEW SCHEDULER MADEUS OBJECT LEVEL DOCUMENT MADEUS TEMPORAL MANAGER MANAGER SPATIAL HTSP Figure 1: Madeus architecture ffl ISIS [9] Madeus [6] TIEMPO [15], CHIMP [3] are constraint based environments ffl Mediadoc [8] HyperProp [11] and HPAS [18] are operational ones. It is clear that it is easier to build an authoring environment based on an operational approach than to do the same using a constraint based formalism. Indeed, theoretical problems ....

....aspects, we use the term temporal scenario or simply scenario . Merry BEFORE And And MEETS Happy Smiley DURING And Merry EQUALS Song1 Happy EQUALS Song2 Merry STARTS Pict1 Pict2 MEETS Pict3 Pict3 MEETS Pict4 Pict4 FINISHES Happy Merry: 25, 35 ] Song2: 10, 60] And: 25, 35] Pict i [15, 120] Happy: 25, 35 ] Smiley: 5, 15] Song1: 10, 60] Figure 2: Temporal specification of the Christmas example 3.1 Using spatial and temporal constraints Madeus is a constraint based authoring tool where the author can describe the spatial and temporal organization of a document by setting ....

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WIRAG S., "Modeling of Adaptable Multimedia Documents ", Proceedings of European Workshop on Interactive Distributed Multimedia Systems and Telecommunication Services (IDMS'97), Darmstadt, September 1997.

....programming of multimedia interfaces that uses a run time scheduler based on a very simple temporal algebra. The simplicity of the temporal model, in particular due to its inability to represent nonacyclic structures, is also the major shortcoming of Madeus [74] CHIMP [154] ISIS [2] and TIEMPO [184]. Andr and Rist [9] have built a system, called PPP, that designs multimedia presentations based on descriptions of the pre conditions of the media actions, their consequences and on the definition of temporal constraints using a strong; hybrid temporal algebra that combines intervals and points ....

S. Wirag. "Modeling of Adaptable Multimedia Documents", Proc. of the European Workshop on Interactive Distributed Multimedia Systems and Telecommunications Services, Darmstadt. September. 1997.

....last alternative, flexible document models are required, which allow to compile different presentations from a given document specification depending on the resource situation. In the TIEMPO 1 project which was supported by the Deutsche Forschungsgemeinsachaft (DFG) a flexible document model [12, 15, 16] was developed. In this model documents are composed of single media objects, such as video, audio or text, and composite media objects, such as pages or scenes. The desired adaptability is achieved by selection groups which allow to define alternative media objects or presentation parts ....

....presentation scene 12345 23 1 4 23 1 41 specification presentation time presentation interval projection temporal space media object interval operator data unit 2. The TIEMPO Document Model 4 2. 2 Modeling of Adaptivity The Tiempo model allows for adaptivity on the object and attribute level [15, 16]. Adaptivity on the object level can be specified by so called selection groups. A selection group contains a number of presentations that can be selected alternatively. Whenever a selection group is performed, the underlying system selects and presents exactly one of these alternatives. A ....

Stefan Wirag. "Modeling of Adaptable Multimedia Documents", In Proc. Interactive Distributed Multimedia Systems and Telecommunication Services; International Workshop, IDMS'97, Darmstadt, Germany, September 1997, pp. 420-429.

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