Scalable video content adaptation

Scalable Video Coding technology allows the efficient distribution of videos through heterogeneous networks. In this work a method for automatically adapting video contents, according to the available andwidth and user preferences, is proposed and evaluated. By exploiting video stream scalability, the proposed solution uses bridge firewalls to perform adaptation. The scalable bitstream is packetized by assigning different Type of Service values, according to the corresponding spatial, temporal and quality resolutions. According to the given bandwidth constraints, an intermediate bridge node, which provides Quality of Service functionalities, discards high resolutions information by using appropriate Priority Queueing filtering policies. A real testbed has been used for the evaluation, proving the feasibility and the effectiveness of the proposed solution