– This paper considers the adaptation of video for quality-of-service (QoS) in a system containing a video server linked to a mobile client. The video server is linked to the wireless network via a dedicated wire link that is lightly loaded. Locating the adaptation functionality at the transmit-side of the wireless link rather than at the server is proposed. The research work to determine the a...

One of the main problems to ensure the quality of services (QoS) in video playback in a replicated distributed video player system is how to adapt to the changing network traffic condition and the workload at the video servers. In this paper, we propose a mechanism, called adaptive real-time monitoring, to solve the problem. The proposed mechanism consists of three steps: selection, monitoring ...

Increasing the performance of cloud downloading service in a peer-peer network by efficient mode selection method. Using P2P to download video content often faces challenges like high bandwidth requirement, dealing with a huge number of peer requests, resulting in inefficient system performance. The latest premium service to have been developed is the cloud downloading. In this service, cloud s...

In [1] we reported the design and implementation of a video-on-demand (VOD) system using a server array architecture. In this paper, we extend the work into a full multimedia server array system for world-wide-web services. The system allows stream-type services such as video and audio guaranteed continuous service irrespective of the background data traffic. The server array approach has the b...

To increase the throughput of parallel video server interconnected by a shared network environment, such as Ethernet, elimination of network collision is highly desired. A special mechanism, serialized con ict-free scheduling, is presented in the paper. Performance study of (1) server-push video severs with con ictfree scheduling algorithm and serialized con ict-free scheduling mechanisms, (2) ...

In this paper, we present the architecture of a Video-on-Demand system called VIOLA. This system exhibits two distinctive features not found in other Video-on-Demand systems, namely scalability, and fault tolerance. System scalability is achieved through a novel Server Array architecture in which video data are distributed among an array of servers. This allows one to scale up the system capaci...

Video servers store digitized, compressed continuous media information on high-capacity secondary or tertiary storage [6]. The secondary storage devices allow random accessible and provide short seek times compared to tertiary storage. Video server design differs significantly from that of traditional data storage servers due to the large size of the objects stored and the real-time requirement...

Multimedia applications such as Video On-Demand, Tele-Shopping, or Distance Learning require a storage facility for audio and video data, called video server. All these applications are very demanding in terms of storage capacity, storage bandwidth, and transmission bandwidth. A video server must also meet the requirements that stem from the continuous nature of audio and video. It must guarant...

We present the design and implementation of a VOD server that addresses the issues of storage, retrieval, and scheduling of a large number of video objects as well as the reliability aspects related to striping (distributing) video objects over several hard disks. The result is a multi-platform, distributed video server built from off-the-shelf components that is able to cope with various kinds...

This paper provides a data placement method based on rate staggering to store scalable video data in a disk-array-based video server. A scalable, or layered, video stream is one which is encoded in a manner that permits the extraction of lower resolution subsets from the full-resolution video bit stream. It is desirable to support layered video streams from a video server since these can be use...