Semantic Description Of Multimedia Content Adaptation Web Services

In pervasive computing, multimedia information is accessed using different devices withrndifferent processing power, storage size, display size, etc. Hence, the information that needsrnto be displayed has to be modified in order to meet the devices’ requirements. Thisrnmodification is called content adaptation.rnMultimedia content adaptation can be done at various places in different frameworks. Somernframeworks propose that content adaptation should be done by content servers, while othersrnconsider that it should be done at the client side. Another approach considers that contentrnadaptation should be performed by third party services that can be implemented using webrnservices. The objective of this research is to find ways of facilitating discovery of thesernthird party content adaptation web services by users of these services.rnIn order to use these web services, one has to be able to find them on the Web. However,rntoday, finding the right web service for a specific task (multimedia content adaptation inrnour case) is difficult. This is mainly because of the type of description used to advertise thernweb services.rnCurrent standards that are used to describe web services are syntactic. Syntactic descriptionrnof web services contains some keywords and signature of the web service, which is later,rnused for searching the services. However, this information does not allow high rate ofrnsuccess during service discovery. These limitations of the current standards can bernimproved by using semantic description methods. Semantic description gives the meaningsrnand relationships of the terms and concepts used in describing a web service, whichrnimproves the discovery of a web service.rnIn order to allow semantic description of multimedia content adaptation web services, wernhave developed an ontology for multimedia content adaptation web services. To developrnthis ontology, we first studied different ontology development methods based on which wernformulated an approach using which we have developed the ontology by identifyingrndifferent types of audio content adaptation web services and their properties that can bernused to increase the semantic information of the audio content adaptation web services.rnIn this research, we have also developed a prototype to show the usability of the ontologyrnthat we developed. The prototype allows a user to advertise a web service using thernontology and look for a specific web service.

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