Stefan Grünvogel - Academia.edu (original) (raw)

Papers by Stefan Grünvogel

Virtual Reality and Augmented Reality

Lecture Notes in Computer Science, 2003

One of the major goals in the development of virtual environments in recent years has been to cre... more One of the major goals in the development of virtual environments in recent years has been to create more and more realistic scenery, characters and natural human forms of interaction with the environment. We question this approach especially for the domain of computer games for two main reasons. Firstly we argue the following: When the absolute difference between reality and virtual environments decreases one would expect the latter to become increasingly believable for a spectator. Paradoxically often the opposite is true since the attention of the spectator gets drawn to the remaining differences to a greater extent. Secondly we ask ourselves why of all things computer games which are created for entertainment should be limited with real world constraints and are not used to experience features that are only possible in virtual environments. We conclude with a 'manifesto' for the renovation of computer games.

Innovations in hardware and network technologies lead to an exploding number of non-interrelated ... more Innovations in hardware and network technologies lead to an exploding number of non-interrelated parallel media streams. Per se this does not mean any additional value for consumers. Broadcasting and advertisement industries have not yet found new formats to reach the individual user with their content. In this work we propose and describe a novel digital broadcasting framework, which allows for the live staging of (mass) media events and improved consumer personalisation. In addition new professions for future TV production workflows which will emerge are described, namely the 'video composer' and the 'live video conductor'.

Lecture Notes in Computer Science, 2008

Recommender systems are a means of personalisation providing their users with personalised recomm... more Recommender systems are a means of personalisation providing their users with personalised recommendations of items that would possibly suit the users needs. They are used in a broad area of contexts where items are somehow linked to users. The creation of recommendations of interactive live TV suffers from several inherent problems, e.g. the impossibility to foresee the contents of the next items or the reactions of the user to the changing programme. This paper proposes an algorithm for building personalised streams within interactive live TV. The development of the algorithm comprises a basic model for users and media items. A first preliminary evaluation of the alogithm is executed and the results discussed.

2006 Second International Conference on Automated Production of Cross Media Content for Multi-Channel Distribution (AXMEDIS'06), 2006

Today's TV broadcasting companies are highly professionalized in the production of linear TV form... more Today's TV broadcasting companies are highly professionalized in the production of linear TV formats. Workflows and technologies for these linear formats are reliable, the production personnel is highly skilled and we can trust in well-known viewing habits of the consumers. The key issue of this paper is: how do we enable such a broadcasting working environment to produce by far more variable, multiperspective or interactive TV formats? We are especially interested in formats entailing a multitude of live audiovisual material like for example sport events or elections, which shall be transformed into an interactive TV event for the consumer at home. This paper is not concerned with the variety of technical problems the interactive TV paradigm leads to, but with questions of future tools and practices on the producers' side, levels of consumer personalization and the respective consumer interfaces to make digital content accessible.

2nd European Workshop on the Integration of Knowledge, Semantics and Digital Media Technology (EWIMT 2005), 2005

Television is undergoing a historical change. Interactive Digital Broadcasting will be reality in... more Television is undergoing a historical change. Interactive Digital Broadcasting will be reality in 2010+. Heaps of video material will be produced by TV broadcasters, which will overwhelm both the producers as well as the consumers. Current TV formats and forms of broadcasting do not satisfy the personal moods and interests of the consumer. We hence propose the development of a TV environment which allows for the establishment of 'virtual personalised channels'. To do so, (live) semantic annotation of video material as well as methods for live staging of media events have to be designed. The resulting drastically different process of content production and consuming will lead to the satisfaction of individual human needs. The approaches outlined in this extended abstract are the basis for our upcoming IST research project LIVE.

Proceedings of the seventh european conference on European interactive television conference - EuroITV '09, 2009

In this work we explore the usage of novel real-time feedback tools in the context of a new iTV p... more In this work we explore the usage of novel real-time feedback tools in the context of a new iTV production process, developed within the scope of the research project LIVE. The exploration is based on analysis of log-files, observations and interviews captured during a field trial at the Austrian broadcaster ORF. We work out characteristic usage patterns, as well as

Computer Animation Conference, 2002

For the management of a large number of motion data for humanoid virtual actors we propose to use... more For the management of a large number of motion data for humanoid virtual actors we propose to use a database system to store and retrieve motion data with additional in- formation. We show key questions lying behind the different classification schemes for human motion. Having obtained these criteria, we deduce the requirements a database has to fulfil for coping different

Lecture Notes in Computer Science, 2004

This paper introduces-the Mixed Reality Stage-an interactive Mixed Reality environment for collab... more This paper introduces-the Mixed Reality Stage-an interactive Mixed Reality environment for collaborative planning of stage shows and events. The Mixed Reality Stage combines the presence of reality with the flexibility of virtuality to form an intuitive and efficient planning tool. The planning environment is based on a physical miniature stage enriched with computergenerated props and characters. Users may load virtual models from a Virtual Menu, arrange those using Tangible Units or employ more sophisticated functionality in the form of special Tools. A major feature of the Mixed Reality stage is the planning of choreographies for virtual characters. Animation paths may be recorded and walking styles may be defined in a straightforward way. The planning results are recorded and may be played back at any time. User tests have been conducted that demonstrate the viability of the Mixed Reality Stage.

Third International Conference on Automated Production of Cross Media Content for Multi-Channel Distribution (AXMEDIS'07), 2007

This paper presents the concept of content recommendations for the production of multi-channel TV... more This paper presents the concept of content recommendations for the production of multi-channel TV shows. Within the 6 th Framework project "LIVE-Live Staging of Media Events" [3] we are developing a production support system which will have a functionality of content recommendations and will support production of multi-channels programs. The paper outlines a concept of a multi-channel show and presents a possible workflow scenario on how to use content recommendations in the production. The details of the semantic content annotations are given and an example on computation of personalized recommendation of archive content is presented.

Lecture Notes in Computer Science, 2007

For the production of interactive live TV formats, new content and new productions workflows are ... more For the production of interactive live TV formats, new content and new productions workflows are necessary. We explain how future content of a parallel multi-stream production of live events may be created from a design and a technical perspective. It is argued, that the content should be arranged by dramaturgical principles taking into account the meaning of the base material. To support the production process a new approach for content recommendation is described which uses semantic annotation from audiovisual material and user feedback.

Journal of Differential Equations, 2003

We consider control affine systems of the form ' x ¼ f 0 ðxÞ þ X m i¼1 u i ðtÞf i ðxÞ; uAU ¼ fu :... more We consider control affine systems of the form ' x ¼ f 0 ðxÞ þ X m i¼1 u i ðtÞf i ðxÞ; uAU ¼ fu : R-U : loc: integrableg on R d with compact control range U and a singular point x n AR d ; i.e. f i ðx n Þ ¼ 0; i ¼ 0; y; m: Control sets are maximal subsets of R d with nonvoid interior where the system is approximately controllable. We suppose that there is a periodic control functions u h such that linearized the system has positive and negative Lyapunov exponents for u h and a periodic control function u s such that the linearized system has only negative Lyapunov exponents for u s : Under an inner pair condition we show the existence of control sets near the singular point, by using local stable and unstable manifolds of the system corresponding to u h and its asymptotic phase.

ZAMM - Journal of Applied Mathematics and Mechanics / Zeitschrift für Angewandte Mathematik und Mechanik, 1998

Mehdi, Q. and Gough, N.,(Eds.). …, 2004

Stéphane Natkin and Liliana Vega Centre De Recherche en Informatique du CNAM Conservatoire Nation... more Stéphane Natkin and Liliana Vega Centre De Recherche en Informatique du CNAM Conservatoire National des Arts et Métiers 292, rue St Martin - 75003 Paris, France E-mails: {natkin, lvega}@cnam.fr ... Stefan M. Grünvogel* NOMADS Lab Nonlinear Media: Art, ...

After describing the conceptual background, which is necessary for the development of future live... more After describing the conceptual background, which is necessary for the development of future live staging TV formats, this document proposes both visionary as well as first concrete methods and design guidelines for online staging. In addition considerations on the respective future workflows and the results of a first survey on suitable live video performance tools are presented.

Ausgehend von den Beobachtungen eines Lehrenden zu den Herausforderungen seiner Studierenden in d... more Ausgehend von den Beobachtungen eines Lehrenden zu den Herausforderungen seiner Studierenden in der Studieneingangsphase wurde in einem gemeinsamen Entwicklungs- und Beratungsverfahren von Lehrendem und Hochschuldidaktiker/-innen ein Modul zum Selbstmanagement im Studium entwickelt. Hierbei sind die Weiterbildung von Lerncoaches und der Einsatz von Lernportfolios zentrale Elemente. Die Weiterbildung der Lerncoaches erfolgt – unter Beteiligung des Lehrenden und unter Einbindung verschiedener Rückkoppelungsprozesse – während der Durchführung der Lehrveranstaltung. Dadurch soll vor allem eine reflexive Haltung anregt werden, damit Studierende sich selbst und ihr Studienverhalten reflektieren und ihre Lernprozesse optimieren.