A QoS-based Service Composition for Content Adaptation

Today´s Internet suffers from the problem of heterogeneity in client devices, network connectivity, content format, and users´ preferences. The framework presented in this paper tackles this problem using the approach of service composition to support distributed multimedia applications. The discussed framework for trans-coding multimedia streams uses self-organizing, resilient data distribution algorithms. The framework takes into consideration the profile of communicating devices, network connectivity, exchanged content formats, context description, and available adaptation services to find a chain of adaptation services that could be applied to the content. Part of the framework is a selection algorithm that finds the best sequence of adaptation services that can maximize the user´s satisfaction with the delivered content.