László Böszörményi

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Web caching is an important technique to scale the Internet. One important performance factor of Web caches is the replacement strategy. Due to specific characteristics of the World Wide Web, there exist a huge number of proposals for cache replacement. This article proposes a classification for these proposals that subsumes prior classifications. Using(More)
Due to the increasing availability and use of digital video data on the Web, video caching will be an important performance factor in the future WWW. We propose an architecture of a video proxy cache that integrates modern multimedia and communication standards. Especially we describe features of the MPEG-4 and MPEG-7 multimedia standards that can be(More)
Introduction and Main Contributions Providing mechanisms that allow the user to retrieve desired multimedia information by their semantic content is now an important issue in multimedia databases [1]. However, current prototypes (e.g. Oracle 8i interMedia and Informix Datablade Modules) index mostly only low-level features of multimedia objects. Therefore(More)
We propose a video browsing tool supporting new efficient navigation means and content-based search within a single video, allowing for interactive exploration and playback of video content. The user interface provides flexible navigation indices by visualizing low-level features and frame surrogates along one or more timelines, called interactive(More)
A new approach for interactive video browsing is described. The novelty of the proposed approach is the flexible concept of interactive navigation summaries. Similar to time sliders, commonly used with standard soft video players , navigation summaries allow random access to a video. In addition, they also provide abstract visualizations of the content at a(More)
Arthroscopic surgery is a minimally invasive procedure that uses a small camera to generate video streams, which are recorded and subsequently archived. In this paper we present a video summarization tool and demonstrate how it can be successfully used in the domain of arthroscopic videos. The proposed tool generates a keyframe-based summary, which clusters(More)
We introduce an easy-to-use video browsing tool which assists users in getting a quick overview of videos as well as in finding segments of interest. It provides a parallel and a tree-based view for browsing the content of videos – or even video collections – in a hierarchical , non-sequential manner. The tool has a plug-in architecture and can be extended(More)