Currently, the democratization of wireless communication means coupled with the advanced technological hardware can offer portable devices that fit in the hand with a very large capacity of computation such as PDAs, mobile phones and even wireless sensors. The users' preferences, in which the document is presented, may need to be considered because the adaption of multimedia content through them is an important aspect of Quality of Service. Our research work focuses on the adaptation of multimedia documents with a strong interest on the interaction based on the user preferences. In this paper, we propose formal definitions of concepts related to the technical adaptation that selects a relevant policy in order to perform an adapted document in the situation where conflicts are detected between the heterogeneity of multimedia document properties and the user needs. We present also an architecture for adapting multimedia contents based on the preferences and we develop a user preference interface. We illustrate the proposed approach with a case study.

The democratization of the means of wireless communication coupled with advanced technological hardware can now offer portable devices that fit in the hand with a capacity of computation and means of wireless communication such as mini PCs, PDAs, mobile phones and even wireless sensors. Distributed multimedia applications are a challenge as they try to meet the constraints of the multimedia document, so that the network provides no guarantee of quality of service (QoS). We propose to adapt multimedia documents based on changes of context. In this paper, we present an architecture that aims at adapting content and presentation of multimedia documents in the context of the user. We develop an adaptation service cannot only detect and solve the problem of heterogeneity between incompatible components, but also to manage the adaptation with preferences of the user. We propose to see the adaptation as a nonfunctional property, provided by an administrator and handled by an adaptation manager QoS.