Interactive multimedia services group

Interactive multimedia services group

The LDOS laboratory is one of the leading developers of new interactive multimedia services. The evolution of digital devices in terms of processing, storage and communication capabilities is promising usage and exchange of multimedia contents among heterogeneous devices (PCs, personal video-recorders, handheld devices, mobile phones, etc.). During the development of such universal communication environment, we need to address some basic issues like standardized content descriptions (meta-data), digital rights management, personalized data mining, content adaptation to the client device, adaptive user interfaces, etc.

Additionally, the group is involved in the development of a teleconsulting system (a groupware application) for medicine.

Interactive digital television

The LDOS research group was involved in the development of services for a new consumer platform with built-in local storage. This platform enables consumers to have access to contents and services at their convenience, independent of the moment of broadcasting using personalized services. The development was mostly focused on personalized selection of TV programmes based on the TV Anytime standard and on the remote control of home digital videorecorder over Internet from a PC or a mobile phone.

Peer-to-peer networks and applications

Within the past IST projects (P2People, ShareIt!), we have developed a JXTA based peer-to-peer platform. The modular design of the platform enables a number of services, such as chat, file sharing, mail, white board and video-conferencing.

Data mining and multimedia databases

We are developing a platform independent system used for search of multimedia contents, stored in a MM database. The database architecture enables generation, coding and exporting of content descriptions into an arbitrary meta-data schema, thus providing a flexible framework usable for a wide range of applications. The tools include an authoring tool for generation of content descriptions as well as a search engine.

Personalized content search

The group for personalized content search has developed adaptive algorithms for the search of multimedia contents. We have tested it successfully in the domain of interactive television (TV Anytime). The generality of the approach used makes it useful for the personalized retrieval of any kind of multimedia content.


During our involvement in the Muffins project we have actively participated in the world's first implementation of an MPEG-21 based framework. The project demonstrated the power of MPEG-21 concepts such as attractive and efficient content-based retrieval mechanisms and digital rights management mechanisms. It also presented an authoring tool for the generation of MPEG-21 content descriptions.

Medical teleconsulting system

This group is involved in the development of a medical teleconsulting system for blood transfusion, which will enable on-line and off-line teleconsulting using a videoconference or a messaging system. Exchange of high quality medical images will enable remote diagnostics and second opinion consultations, using secure connections. The system is being developed in cooperation with the Blood transfusion centre of Slovenia and the Academy of fine arts, University of Ljubljana.