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IRT
Rennes, France

Laabs M.,IRT
EBU Technical Review | Year: 2012

Some of the steps and required mechanisms needed to go 'all-(Internet Protocol (IP)' and leverage its possibilities are discussed. The first step to take involves achieving seamless switching between signals in the IP layer. The Serial Digital Interface (SDI) is a range of video interfaces standardized by SMPTE to achieve these objectives. SMPTE 2022 is a group of standards that specifies the wrappings of professional video into IP. SMPTE 2022-2 and SMPTE 2022-4 define the wrapping of the MPEG-2 Transport Stream with constant and variable bitrate. SMPTE 2022-6 is another standard which will define the wrapping for SDI along with compressed and wrapped media formats. It is based on the Real-time Transport Protocol (RTP) and adds another protocol layer for a high-precision clock and extra metadata known as the High-Bitrate Media Transport Protocol (HBRMT). Source


Biatek T.,IRT | Hamidouche W.,INSA Rennes | Travers J.-F.,TDF | Deforges O.,INSA Rennes
5th IEEE International Conference on Consumer Electronics - Berlin, ICCE-Berlin 2015 | Year: 2015

Scalable video encoders compress a single video sequence to produce a bitstream composed of several layers, corresponding to different temporal, spatial and quality representations of the input video sequence. This technique improves the coding efficiency compared to simulcast encoding of each representation by exploiting additional correlations through inter-layer predictions. The latest scalable video coding standard SHVC -the extension of the recent HEVC standard-announces up to 30% bandwidth reduction. However, this gain is valid under the common test conditions, established by the JCT-VC expert group, which are not necessarily relevant in broadcasting environment and do not include video sequences in UHD resolution. In this paper, we expose the results of an extended study about the optimum gains that scalability can bring in concrete broadcast use-cases. Indeed, we consider SHVC with HDTV/UHDTV as spatial enhancement layers. Then, we search the optimum balance of layers' dedicated bitratres in sense of coding efficiency and objective quality for different UHDTV video sequences and use-cases. © 2015 IEEE. Source


Van Deventer O.,TNO | De Wit J.,TNO | Vanattenhoven J.,Catholic University of Leuven | Guelbahar M.,IRT
CEUR Workshop Proceedings | Year: 2013

This paper presents insights and learning experiences on the development of an integrated group recommender system in the European FP7 HBBNext research project. The system design incorporates insights from user research and evaluations, media industry players, and European HbbTV standardization efforts. Important differences were found between providing content recommendations for HbbTV and e.g. on-line purchases. The TV user experience is very "lean back", so the user interface and interaction has to be minimalistic. The TV broadcast schedule changes continuously, so the system has to be continuously updated. TV is typically consumed with family or friends, so it should support group recommendations. Furthermore, an important challenge is the HbbTV business ecosystem, where the content originates from multiple broadcasters and the recommendations provider may be different from the HbbTV platform provider. The resulting system is a Java-based recommender framework with open interfaces for content metadata provisioning, user-profile and identity management, group recommender algorithms, and group recommendation retrieval. A metadata provision system was developed, automatically enriching EPG metadata with content metadata from open Internet sources. Users are identified via QR-code scanning and face recognition. The recommender uses a genre-based collaborative "least misery" group-filtering algorithm. The client side application is an HbbTV application. Whereas most requirements could be fulfilled, further study is needed to find acceptable solutions for collecting user preferences and user identification in the HbbTV context. Source


Berg M.,IRT | Jonsson L.,Sr.
EBU Technical Review | Year: 2010

Networks are everywhere in broadcast production, contribution and distribution, and network islands are becoming connected together. The use of high-bitrate file transfer is increasing and as HDTV "enters" the networks, 3D-TV will surely follow. While network traffic is increasing rapidly, the networks are getting more and more complex with more and more broadcasters operating their own networks. It was therefore only natural, in the re-organization process of EBU Technical, that the Expert Community on Networks and Infrastructure (ECN) was established... with a new mandate. Source


Lacoche J.,IRT | Duval T.,Telecom Bretagne | Arnaldi B.,INSA Rennes | Maisel E.,ENIB | Royan J.,IRT
2016 IEEE Symposium on 3D User Interfaces, 3DUI 2016 - Proceedings | Year: 2016

In this paper we propose D3PART (Dynamic 3D Plastic And Redistribuable Technology), a model to handle redistribution for 3D user interfaces. Redistribution consists in changing the components distribution of an interactive system across different dimensions such as platform, display and user. We extend previous plasticity models with redistribution capabilities, which lets developers create applications where 3D content and interaction tasks can be automatically redistributed across the different dimensions at runtime. © 2016 IEEE. Source

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