Progressive proxy-based multimedia transcoding system with maximum data reuse

In this paper, we propose a new proxy-based transcoding system based on a novel, scalable, and progressive transfer model for multimedia data. This system features on-the-fly transcoding on streaming web data with negligible overhead, maximum data reuse among different transcoded versions of a web object, and the optimal bandwidth usage between the proxy and the server. The importance of the system reflects not only in its feasibility in implementation but also in its matching with the new HTTP protocol support for partial object retrieval and the emerging new multimedia data formats such as JPEG2000 and MPEG4.