With the growth of computing power and the proliferation of the Internet, video streaming services become widely deployed. In this paper, we propose, design, implement, and evaluate a proxy caching system for MPEG-4 video streaming services. With our system, the high-quality, low-delay, and scalable video distribution can be accomplished. In our system, a video stream is divided into blocks for...

The proxy technique is originally developed for WWW system, but we expect it is useful to improve the performance and quality of video streaming applications. Especially, if each proxy is capable of adapting incoming or cached video data to user’s demand, user’s QoS requirements on video streams can be fully satisfied. On receiving a request from a user, the proxy first checks the cache. If a c...

We have developed fully functional Video Server and Client applications which can transmit, receive, decom-press and display compressed video over various networks. Our video transport allows dynamic rate control feedback, loss detection and repair request from Clients to the Server. Our experiments show how feedback-before-degradation scheme for rate adaptation maintains desired QoS for video ...

On-demand video servers based on hierarchical storage systems are able to o er highcapacity and low-cost video storage. In such a system, video les are stored in the tertiary level and transferred to the secondary level to be displayed. The design of video servers allowing user interaction with the playbacked video is of great interest. We have conducted a comprehensive study on the architectur...

In a video on demand system, the main video repository may be far away from the user and generally has limited streaming capacities. Since a high quality video’s size is huge, it requires high bandwidth for streaming over the internet. In order to achieve a higher video hit ratio, reduced client waiting time, distributed server’s architecture can be used, in which multiple local servers are pla...

YouTube currently accounts for a significant percentage of the Internet’s global traffic. Hence, understanding the characteristics of the YouTube traffic generation pattern can provide a significant advantage in predicting user video quality and in enhancing network design. In this paper we present a characterization of the traffic generated by YouTube when accessed from a regular PC. Based on ...

We present a stream tapping protocol that involves clients in the video distribution process. As in conventional stream tapping, our protocol allows new clients to tap the most recent broadcast of the video they are watching. While conventional stream tapping required the server to send to these clients the part of the video they missed, our protocol delegates this task to the clients that are ...

In this paper, we propose a loopback approach in a two-level streaming architecture to exploit collaborative client/proxy buffers for improving the quality and efficiency of large-scale streaming applications. At the upper level we use a Content Delivery Network (CDN) to deliver video from a central server to proxy servers. At the lower level a proxy server delivers video with the help of colla...

The bandwidth-intensive and long-lived nature of high quality digital video makes it a challenging problem to transmit such video over the Internet. In this paper, we propose a scalable and flexible framework integrating proxy-based prefix caching with periodic broadcast of the suffix of a video from the server, for efficiently streaming a set of popular videos to a large number of asynchronous...

The emerging “information super-highway” and accelerating improvements in computer and mass storage technologies will soon make multimedia services, such as video-on-demand (VOD), a reality. Since a media server will be required to move a large amount of data over distribution networks, its I/O subsystem design is critical to its success. In this paper, we explore a new technology, Fibre Channe...