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When viewing multimedia presentations, a user can only be attending to a relatively small part of the video display at any one point in time. Accordingly, by shifting allocation of bandwidth from peripheral regions of the screen to Regions-of-Interest (...

The rapid evolution in the hardware sector brought up various (mobile) end user devices like PDAs or cell phones on which online multimedia content can be consumed. Due to different capabilities of these devices as well as individual user preferences, ...

Advanced computing devices equipped with various wired and wireless network capabilities, built-in microphones and audio capture devices are becoming increasingly popular. At the same time, sophisticated signal processing algorithms for hands-free ...

Broadcasting protocols are used to reduce the bandwidth requirement of distributing popular videos invideo-on-demand system. The scheme proposed in [1] claimed that it can reduce the client buffer requirement and the server network bandwidth of mirrored-...

Channel modelling in a network path is of major importance in designing delay sensitive applications. It is often not possible for these applications to retransmit packets due to delay constraints and they must therefore be resilient to packet losses. ...

The proposed ABA scheme uses the queue occupancy as a feedback to adaptively allocate the bandwidth for each queue of EF PHB. Because the allocated bandwidth converges to the corresponding input traffic, ABA remains the queue dynamics steadily. The ...

In this paper we present an adaptive maximum a posteriori (MAP) error concealment algorithm for dispersively packetized wavelet-coded images. We model the subbands of a wavelet-coded image as Markov random fields, and use the characteristics of subband/...

In VOD systems, the limited disk I/O bandwidth and buffer space makes admission control very important. An on-line measurement based admission control algorithm on VBR video servers is proposed in this paper. By adjusting the length of scheduling period ...

In this paper a new spatial interpolation method is presented to deal with packet loss in transmission of compressed image data. The reconstruction process follows the steps as below Firstly, the edge information of lost block is coarsely inferred using ...

Interactive Digital TV is emerging as a potentially important medium to create opportunities for learning at home. To date, the offer has been mostly based on the contents available through broadcast, but this is expected to change in the near future. ...

This paper describes a method of re-engineering based on information technology engineering and object-oriented software engineering. Focused on the reusability issue, these two communities propose different technical solutions. The first, using XML ...

A lot of asynchronous systems have been developed to provide distance-learning solutions over the Internet. However, those environments are not able to give prompt feedback and they lack of interactivity. This research focuses on the provision of ...

This paper considers the problem of giving a presentation over heterogeneous computing environment including different kinds of networks and information devices. This style of presenting is useful in distance learning, distance meeting, distance ...

In e-learning and distance teaching environments, course designers have to adapt their learning materials (resources and scenarios) to a pre-existing social and technical context. Even if teaching experiences are acquired by taking into account learners ...

In this paper, we present an open standards approach to reach and augment users of pervasive computing devices to create powerful multimedia presentations using dynamic web-based multimedia templates. In a mobile e-learning environment where time and ...

Interactive multimedia software capable of running on different devices, such as smartphones or digital television receivers, will be a consumer expectation in the near future. Supporting each device individually is too expensive. Therefore a common ...

One of the most interesting topics in modern multimedia research, as well as one of the most important tasks in modern audiovisual content providing systems is the treatment of content and users at a semantic level. In this framework, mapping user ...

Interaction management is concerned with the protocols that govern structured interactive activities among multiple users or agents in distributed and collaborative environments. Research in this area has largely been carried out in specific application ...

The management of distributed multimedia systems is simplified when it is based on policies. The latter should be platform independent and expressed in terms of roles. Usually, they are defined through languages that conceptualize the hardware ...

In this paper, a new algorithm is introduced that relies on a role-based access control model to reduce the amount of redundant information sent in multicast sessions. The algorithm utilizes the active nodes located in the multicast tree to reduce the ...

A fragile, block-wise, and content-based watermarking for image authentication and recovery is presented. In this scheme, the watermark of each block is an encrypted form of its signature, which includes the block location, a content-feature of another ...

Biological databases have become increasingly important distributed resources in this field. These databases contain a mix of data types, including sequence data, structured data such as molecular weights of GC content, and annotations in terms of ...

Existing Discrete Fourier transform (DFT)-based algorithms for identifying protein coding regions in DNA sequences[9, 2, 3, 7] exploit the empirical observation that the spectrum of protein coding regions of length N nucleotides has a peak at frequency ...

The work presented in this paper is motivated by a large media research project entitled "Media Upheavals". This project is aimed at investigating the foundations and the structural aspects of the media upheavals at the beginning and at the end of the ...

High resolution 3D range scanning as well as iso-surface extraction have introduced densely and uniformly sampled models that are difficult to render at an interactive rate. To remove excessive details and produce meshes of various resolutions for ...