In this paper we present the case for using specifically configured protocol stacks geared towards human requirements in the delivery of distributed multimedia. We define Quality of Perception (QoP) as representing the user side of the more technical ...

Parallel servers for I/O and compute intensive continuous media applications are difficult to develop. A server application comprises many threads located in different address spaces as well as files striped over multiple disks located on different ...

Multimedia systems such as video-on-demand (VOD) servers are time critical systems. These systems have strict response times, which implies that a delayed response can have serious consequence. For instance, in the case of a VOD server, an immediate ...

In this paper we propose an algorithm for the purpose of video indexing which estimates the global motion caused by camera movement. Since motion estimation is a computationally expensive process, we are using information already computed in block based ...

The distribution of digital video content over computer networks has become commonplace. Unfortunately, most digital video encoding standards do not degrade gracefully in the face of packet losses, which often occur in a bursty fashion. We propose an ...

Video transcoding is one of the key technologies in implementing dynamic adaptation of the bit rate of a pre-encoded video stream to the available bandwidth over various networks. Many different transcoder architectures have been proposed to achieve ...

The rapid growth of digital image data increases the need for efficient and effective image retrieval systems. Such systems should provide functionality that tailors to the user's need at the query time. In this paper, we propose a new image retrieval ...

Multimedia databases have been the subject of extensive research for the last several years. In particular, semantic modeling of video data spurred tremendous interest and produced various formalisms for content-based retrieval of video data. In this ...

Patching is a cost efficient channel-sharing technique for video-on-demand systems. However, its performance is limited due to the fact that a video stream cannot be shared unless it delivers the video in its entirety. As a result, larger and larger ...

Video-on-demand (VOD) designs typically feature either request or broadcast architectures. Both have limitations. Request architectures experience a limit in the number of clients that can be adequately serviced. Broadcast architectures require large, ...

We present a novel video streaming technique called catching for on-demand delivery of “hot” (i.e., frequently accessed) video objects to a large number of clients. This technique not only significantly reduces the server and network resource ...

Broadcasting protocols for video-on-demand continuously retransmit videos that are watched simultaneously by many viewers. Nearly all broadcasting protocols assume that the client set-top box has enough storage to store between 48 and 60 minutes of ...

Current camera-monitor teleconferencing applications produce unrealistic imagery and break any sense of presence for the participants. Other capture/display technologies can be used to provide more compelling teleconferencing. However, complex ...

This paper presents a new algorithm for immersive teleconferencing, which addresses the problem of registering and blending multiple images together to create a single seamless panorama. In the immersive teleconference paradigm, one frame of the ...