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Sant'Ambrogio di Torino, Italy

Rodriguez E.,Polytechnic University of Catalonia | Delgado J.,Polytechnic University of Catalonia | Boch L.,Polytechnic University of Catalonia | Rodriguez-Doncel V.,Center for Research and Technological Innovation
IEEE Multimedia | Year: 2015

Contract expression languages (CELs) let users represent business contracts in a digital and structured form. Examples include the Content Reference Forum format, the OASIS eContracts standard, and a proposed extension for MPEG-21 Part 5. These formats have influenced the MPEG-21 CEL design, which has been recently specified by modeling the most relevant clauses in audiovisual contracts. As the authors describe, the MPEG-21 CEL defines a language for representing media contracts as XML. It's structured in two schemas: a core defining a contract's structural elements, and an extension with vocabulary for specific applications. © 1994-2012 IEEE. Source

Armano G.,University of Cagliari | Giuliani A.,University of Cagliari | Messina A.,Center for Research and Technological Innovation | Montagnuolo M.,Center for Research and Technological Innovation | Vargiu E.,University of Cagliari
CEUR Workshop Proceedings | Year: 2011

Nowadays, Web is characterized by a growing availability of multimedia data together with a strong need for integrating different media and modalities of interaction. Hence, the main goal is to bring into the Web data thought and produced for different media, such as TV or radio content. In this scenario, we focus on multimodal news aggregation retrieval and fusion. In particular, we present preliminary experiments aimed at automatically suggesting keywords to news and news aggregations. The proposed solution is based on the adoption of extraction-based text summarization techniques. Experiments are aimed at comparing the selected text summarization techniques with respect to a simple technique based on part-ofspeech tagging. Results show that the proposed solution performs better than the baseline solution in terms of precision, recall, and F1. Source

Messina A.,Center for Research and Technological Innovation | Montagnuolo M.,Center for Research and Technological Innovation
Studies in Computational Intelligence | Year: 2010

In the modern age, cross-media production is an innovative technique used by the media industry to ensure a positive return on investments while optimising productivity and market coverage. So that, technologies for the seamless fusion of heterogeneous data streams are increasingly considered important, and thus research efforts have started to explore this area. After having aggregated heterogeneous sources, what has to be addressed as the next problem is efficiency in retrieving and using the produced content. Tools for personalised and context-oriented multimedia retrieval are indispensable to access desired content from the aggregated data in a quicker and more useful way. This chapter describes the problems connected with this scenario and proposes an innovative technological framework to solve them, in the area of informative content (news) distribution and retrieval. Extensive experiments prove the effectiveness of this approach in a real-world business context. © 2010 Springer-Verlag Berlin Heidelberg. Source

Di Massa R.,Polytechnic University of Turin | Montagnuolo M.,Center for Research and Technological Innovation | Messina A.,Center for Research and Technological Innovation
AIEMPro'10 - Proceedings of the 2010 ACM Workshop on Automated Information Extraction in Media Production, Co-located with ACM Multimedia 2010 | Year: 2010

This paper presents an implicit news recommender system based on the user's interests and multimodal content analysis. Multimodality is here intended as the capability of integrating multiple modes, e.g. radio-television channels and Web sites, and different media, e.g. written text and spoken content. Personal interests are inferred by natural language processing of the users' blogs. Latent semantic analysis is used to find the relationships between such interests and both online newspaper articles and broadcast news stories. The novelty of this system is the ability to treat equally and simultaneously online press reports and TV news streams. Experiments in a long-term real-world usage scenario demonstrate the quality of the proposed recommendations. Source

Cagliero A.,University of Turin | De Vita A.,Center for Research and Technological Innovation | Gaffoglio R.,University of Turin | Sacco B.,Center for Research and Technological Innovation
IEEE Antennas and Wireless Propagation Letters | Year: 2016

Following on from the increasing interest for electromagnetic waves carrying orbital angular momentum (OAM), different configurations of antenna systems able to generate such beams have been proposed. However, in our opinion, a traditional radiation pattern approach does not provide the right picture of an OAM-based communication link. For this reason, we propose a new general concept, the "OAM-link pattern," which takes into account the peculiar phase structure characterizing these waves. Focusing on OAM transmissions between antenna arrays, we introduce a formula for the link budget evaluation that describes the whole communication link and directly leads to a "classically shaped" main lobe pattern for a proper rephased reception in the case of uniform circular arrays. © 2015 IEEE. Source

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