Olivier Aubert

Advene: active reading through hypervideo

Active reading and hypermedia usage are an integral part of scholar daily practices, but the full exploitation of their potentialities still lies far ahead. In the search for new methods and tools, we focus in this article on the use of audiovisual material in a scholar context. One of the results of active reading applied to audiovisual material can be hypervideos, that we define as views on audiovisual documents associated with an annotation structure. The notion of hypervideo is useful to analyse existing video-based hypermedia systems as well as building new systems. The Advene project proposes an implementation of hypervideos through a framework that allows experimentations of new visualisation and interaction modalities for enriched videos.

Favorable radiological outcome of skeletal Erdheim-Chester disease involvement with anakinra.

Erdheim-Chester disease is a rare non-langerhans cell histiocytosis characterized by infiltration of foamy CD68-positive but CD1a-negative macrophages and fibro-inflammatory lesions as retroperitoneal, periureteral areas or bones. Interferon-α therapy has been used as treatment but it had variable efficiency and limited tolerance. More recently, a recombinant form of interleukin-1 receptor antagonist (anakinra) was used with success but no skeletal radiological improvement was recorded. We report here a case of interleukin-1 receptor antagonist in the treatment of refractory bones infiltration in Erdheim-Chester disease. After 1 year of treatment, the positron emission tomography-computed tomography showed an outstanding response of the skeletal involvement with clearly lower and smaller hypermetabolism images.

Advene: an open-source framework for integrating and visualising audiovisual metadata

The open-source Advene prototype offers a framework for integrating and visualising audiovisual metadata. It allows users to define by themselves, according to their specific tasks, the structure of the metadata as well as the different ways in which it should be visualised. By storing metadata and visualisation specifications independently from the audiovisual document, it allows to share analyses and comments on any audiovisual document. Its open nature and simple principles make it an ideal testbed for experimentation with new audiovisual metadata interaction modalities.

CHM: an annotation- and component-based hypervideo model for the Web

Hypervideos are hypermedia documents that focus on video content. While they have long been deployed using specialized software or even hardware, the Web now offers a ground for them to fit into standardized languages and implementations. However, hypervideo design also currently uses very specific models limited to a single class of documents, or very generic hypermedia models that may not appropriately express their specific features. In this article we describe such features, and we introduce CHM, an annotation-driven and component-based model to conceptualize hypervideos through a high level operational specification. An extensible set of high level components is defined to emphasize the presentation and interaction features modeling, while lower level components offer more flexibility and customization opportunities. Being annotation-based, the model promotes a clear separation between video content/metadata and their various potential presentations. We also describe WebCHM, an implementation of CHM with standard Web technologies that provides a general framework to experiment with hypervideos on the Web. Two examples are provided as well as a preliminary usage study of the model and its implementation to validate our claims and proposals.

Canonical processes in active reading and hypervideo production

Active reading of audiovisual documents is an iterative activity, dedicated to the analysis of the audiovisual source through its enrichment with structured metadata and the definition of appropriate visualisation means for this metadata, producing new multimedia objects called hypervideos. We will describe in this article the general decomposition of active reading and how it is put into practice in the Advene framework, analysing how its activities fit into the Canonical Media Processes model.

Advene as a tailorable hypervideo authoring tool: a case study

Audiovisual documents provide a great primary material for analysis in multiple domains, such as sociology or interaction studies. Video annotation tools offer new ways of analysing these documents, beyond the conventional transcription. However, these tools are often dedicated to specific domains, putting constraints on the data model or interfaces that may not be convenient for alternative uses. Moreover, most tools serve as exploratory and analysis instruments only, not proposing export formats suitable for publication. We describe in this paper a usage of the Advene software, a versatile video annotation tool that can be tailored for various kinds of analyses: users can define their own analysis structure and visualizations, and share their analyses either as structured annotations with visualization templates, or published on the Web as hypervideo documents. We explain how users can customize the software through the definition of their own data structures and visualizations. We illustrate this adaptability through an actual usage for interview analysis.

Component-based hypervideo model: high-level operational specification of hypervideos

Hypervideo offers enhanced video-centric experiences. Usually defined from a hypermedia perspective, the lack of a dedicated specification hampers hypervideo domain and concepts from being broadly investigated. This article proposes a specialized hypervideo model that addresses hypervideo specificities. Following the principles of component-based modeling and annotation-driven content abstracting, the Component-based Hypervideo Model (CHM) that we propose is a high level representation of hypervideos that intends to provide a general and dedicated hypervideo data model. Considered as a video-centric interactive document, the CHM hypervideo presentation and interaction features are expressed through a high level operational specification. Our annotation-driven approach promotes a clear separation of data from video content and document visualizations. The model serves as a basis for a Web-oriented implementation that provides a declarative syntax and accompanying tools for hypervideo document design in a Web standards-compliant manner.

Hypervideo and Annotations on the Web

Effective video-based Web information system deployment is still challenging, while the recent widespread of multimedia further raises the demand for new online audiovisual document edition and presentation alternatives. Hyper video, a specialization of hypermedia focusing on video, can be used on the Web to provide a basis for video-centric documents and to allow more elaborated practices of online video. In this paper, we propose an annotation-driven model to conceptualize hyper videos, promoting a clear separation between video content/metadata and their various potential presentations. Using the proposed model, features of hyper video are grafted to wider video-based Web documents in a Web standards-compliant manner. The annotation-driven hyper video model and its implementation offer a general framework to experiment with new interaction modalities for video-based knowledge communication on the Web.

Creating and sharing hypervideos with advene

The Advene pro ject aims at developing an open-source framework for hypervideo engineering, that allows to 1/ annotate audiovisual documents, i.e. to associate information to specific fragments of a video; 2/ provide augmented visualisations of the video that use the annotation structure; 3/ exchange the annotations and their associated visualisation modes independently from the original video, as documentary units called packages.