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Today's construction industry relies heavily on high-performing building information modelling (BIM) systems. By deploying the Industry Foundation Classes (IFC) as a description language, these systems offer building information in a widely interoperable format, so that several applications are able to infer extra information. For a certain functionality, IFC shows limitations however. Existing semantic...
There's a gap in consumer communications on how networks, devices, and services handle and identify space & time in media resources in the Web. W3C's Media Fragments URI specification, which we edited and contributed to over the last couple of years, not only bridges this gap by homogeneously opening up time-related media to the Internet crowd, but also makes time-related annotation feasible for...
The current multimedia landscape is characterized by a significant heterogeneity in terms of coding and delivery formats, usage environments, and user preferences. This paper introduces a transparent multimedia content adaptation and delivery approach, i.e., model-driven content adaptation and delivery. It is based on a model that takes into account the structural metadata, semantic metadata, and...
Today, users often want to consume personalized versions of multimedia content (e.g., a selection of the most interesting video scenes). These user preferences can be fulfilled by performing semantic adaptations, which are typically guided by semantic metadata. In this paper, we discuss how high-level semantic adaptations along the temporal axis can be performed using format-independent adaptation...
News production is characterized by complex and dynamic workflows in which it is important to produce and distribute news items as fast as possible. In this paper, we show how personalized distribution and consumption of news items can be enabled by automatically enriching news metadata with open linked datasets available on the web of data, thus providing a more pleasant experience to fastidious...
Multimedia content adaptation is gaining importance because of the growing amount of multimedia content on the one hand and the growing diversity in usage environments on the other hand. Furthermore, to deal with the growing amount of coding formats for multimedia content, format-independent adaptation systems are desired. These systems support the exploitation of scalability to meet the usage environment,...
The role of metadata is gaining importance due to today's growth of multimedia content. Currently, XML is the standard for data interchange. However, as XML Schemas do not express semantics but rather the document structure, there is a lack of semantic interoperability regarding current (XML-based) metadata standards. By using semantic Web technologies, ontologies can be created to describe the semantics...
JPEG 2000 and HD Photo (JPEG XR) enable the coding of images with several adaptivity provisions. These provisions allow taking into account the capabilities and constraints of diverse usage environments. However, the actual adaptation of coded bitstreams requires additional system complexity. This paper investigates how JPEG 2000 and HD Photo can be used in a standardized and XML-based framework for...
Due to the increasing heterogeneity in the current multimedia landscape, the delivery of multimedia content has become an important issue today. This heterogeneity is not only reflected by a plethora of different usage environments, but also by the presence of multiple (scalable) coding formats. Therefore, format-independent adaptation engines have to be used within a multimedia delivery platform,...
In order to create a media resource adaptation engine that supports current and future coding formats, a generic (i.e., format-agnostic) solution is needed. One way to realize this is to rely on automatically created textual descriptions of the high-level syntax of binary media resources, which can be used to steer the adaptation of media resources. MPEG-21 generic bitstream syntax schema (gBS Schema)...
Due to the increasing heterogeneity in network and terminal capabilities, the delivery of multimedia content has become an important issue today. In order to avoid offering multiple versions of the same media resource, a transparent approach under the form of scalable coding is needed for multimedia delivery systems. This paper proposes a fully format agnostic adaptation engine for scalable bitstreams...
The use of Regions Of Interest (ROIs) is a useful concept for many application scenarios, especially for those applications that are deployed in heterogeneous multimedia environments. In this paper, we show how Flexible Macroblock Ordering can be used in the scalable extension of the H.264/AVC specification in order to define the ROIs in the coded bit- stream. Furthermore, we introduce an XML-driven...
Semantic video adaptation takes into account the relevance of the different fragments of the video content in order to create a tailored video stream based on the user's preferences. As a shot can be considered as the smallest semantic unit in a video sequence, metadata can be added to each shot using MPEG-7 descriptions. Based on these metadata and the user's preferences, the original bitstream can...
Bitstream structure descriptions (BSDs) allow taking the complexity of transforming scalable bitstreams from the compressed domain to the semantic domain. These descriptions are an essential part of an XML-driven video adaptation framework. The performance of a BSD transformation engine is very important in such architecture. This paper evaluates the efficiency of XML-based transformation languages...
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