The average downlink bandwidth of GPRS is about 25Kbps, while the bit-rate of typical streaming media is at least 100Kbps. It is an exigent job for GPRS business system to decrease bit-rate of streaming media. In this paper we propose a novel scheme, which can select decoding parameters (based on the special attribute of different kinds of streaming media program) automatically to fit the bandw...

Résumé : Le calcul de concepts formels, et plus généralement l’usage des treillis de Galois pour l’extraction de connaissances, a motivé de très nombreuses recherches. Grâce à des progrès algorithmiques récents, ces techniques fournissent des motifs particulièrement intéressants pour l’analyse de grandes matrices codant l’expression de milliers de gènes dans des situations biologiques variées. ...

While the devices for media capture have advanced from mechanical to computational since the invention of photography and motion pictures in the 19 century, their underlying user interaction paradigms have remained largely unchanged. Current interaction techniques for media capture do not leverage computation to solve key problems: the skill required to capture high quality media assets; the ef...

A data warehouse collects and maintains a large amount of data from several distributed and heterogeneous data sources. Often the data is stored in the form of materialized views in order to provide fast access to the integrated data, regardless of the availability of the data sources. In this paper we focus on the following problem: for a given set of materialized select-project-join (SPJ) vie...

Being able to formulate useful SQL queries is a fundamental skill required by many software development professionals. Masteringthis skill is a difficultprocess, requiringconsiderable practice and effort on the part of the student. In addition, assessment of SQL query formulation skills is a process that does not appear to have been thoroughly researched, and numerous problems are inherent to t...

At a minimum, a multimedia database must contain the media itself, plus some level of metadata which describes the media. In early systems, this metadata was limited to simple fields containing basic attributes such as the media title, author, etc. and the user would select media using relational queries on the fields. Video on demand systems are one example of this. More recently, systems have...

Content networks (CNs) are being introduced to extend content distribution networks (CDNs) with content creation, modification, management, and placement mechanisms to support value-added services and modern applications. This paper presents a CN-based architecture supporting collaborative media streaming services which allow a synchronous group of users to select, watch and control a multimedi...