Design and Implementation of a Multimedia Push and Inter-device Handoff System for Mobile Devices
|關鍵字:||遠端學習;跨終端機換手;多媒體串流;distance learning;inter-device handoff;multimedia streaming|
During the past few years, distance learning has gradually become more and more attracting. However, most of the previous research focuses on making the audience able to learn remotely through internetworking. Little research has been done to increase the flexibilities of teaching at a distance. Moreover, with the increase of network bandwidth and the advance of streaming technologies have made multimedia-streaming services feasible. Therefore, in this thesis, we design and implement a multimedia distance learning system that could make the audience and speakers take part in teaching activities from the distance. In this system, the audience could watch not only the on-going speeches or teaching programs but also some teaching programs, which have previously been recorded. Furthermore, the advance in terminal technologies also makes terminal devices versatile. It is now possible that a person may use different devices in different occasion or even use multiple devices simultaneously. However, if a person wants to change device in the middle of a multimedia service he needs to re-instantiate the multimedia service, instead of transferring he multimedia-streaming that they were using on one of his device to the other one. Therefore, we also provide inter-device handoff functionality in our system. Besides, we could also adjust the bit-rates of the multimedia streaming according to the characteristics of the devices in use while performing an inter-device handoff. Finally, we also present different methods to deliver the images of teaching slides. In this thesis, we describe three different approaches to delivering the slides images, and have implemented one of these three different approaches. The approach has been carefully designed to transfer slide images that is clear to audience without consuming much bandwidth.
|Appears in Collections:||Thesis|